Inverter - EP-3K-48-AU - User Manual - 091119
Inverter - EP-3K-48-AU - User Manual - 091119
Inverter - EP-3K-48-AU - User Manual - 091119
2018-10-13
Version V1.1
CONTENT
1. EP-3K-48-AU inverter Introduction ............................................................................................................................. 3
2. Safety Notes ................................................................................................................................................................. 4
2.1. Safety Notes ...................................................................................................................................................... 4
2.2. Installation and Maintenance Notes ................................................................................................................. 4
2.3. Signs on the inverter ......................................................................................................................................... 5
3. Installation ................................................................................................................................................................... 7
3.1. Product Overview ............................................................................................................................................. 7
3.2. Packing List ....................................................................................................................................................... 8
3.3. Installation Environment .................................................................................................................................. 8
3.4. Installation Tools ............................................................................................................................................... 9
3.5. Installation Position ........................................................................................................................................ 10
3.6. Mount inverter .............................................................................................................................................. 11
4. Electrical Connection ................................................................................................................................................. 12
4.1. Battery Connection ......................................................................................................................................... 13
4.2. PV Connection ................................................................................................................................................ 13
4.3. CT / CAN / RS485 / NTC connection ............................................................................................................... 15
4.4. Grid Connection .............................................................................................................................................. 17
4.5. Critical Load Connection (EPS function) ......................................................................................................... 18
5. Buttons and indicator lights ....................................................................................................................................... 19
5.1. Buttons: .......................................................................................................................................................... 19
5.2. Indicator lights and status of EP-3K-48-AU inverter ...................................................................................... 19
6. Operation ................................................................................................................................................................... 20
6.1. Double Check .................................................................................................................................................. 20
6.2. First Time Setup (IMPORTANT!) ...................................................................................................................... 20
6.3. Commissioning ............................................................................................................................................... 23
6.4. Menu .............................................................................................................................................................. 23
6.4.1. Basic setting ......................................................................................................................................... 24
6.4.2. Advanced setting ................................................................................................................................. 31
6.4.3. Event List .............................................................................................................................................. 34
6.4.4. System information interface .............................................................................................................. 34
6.4.5. Energy Statistic .................................................................................................................................... 35
6.4.6. Software upgrade ................................................................................................................................ 36
7. Technical Data ............................................................................................................................................................ 37
8. Troubleshooting ......................................................................................................................................................... 39
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1. EP-3K-48-AU inverter Introduction
The EP-3K-48-AU hybrid inverter is used in PV system with battery storage.
Energy produced by the PV system will be optimized for maximum self‐consumption.
The EP-3K-48-AU inverter can work in auto or time‐of‐use (TOU) mode, charge / discharge the battery when
needed. In auto mode, the EP-3K-48-AU inverter will charge surplus PV energy into the battery & discharge battery
to supply power to local load when PV energy is not enough.
In case of blackout, EP-3K-48-AU inverter can work in Emergency Power Supply (EPS) mode. EP-3K-48-AU inverter
will utilize power from PV panels & energy stored in the battery to supply power to critical load.
Fig. 1 EP-3K-48-AU Inverter schematic diagram
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2. Safety Notes
Before installation, please make sure you read & understand this manual. The EP-3K-48-AU inverter strictly comply
with safety rules of design and testing. During the installation, operation and maintenance, operators should abide
by local safety regulations. Improper operation may cause an electric shock or damage the equipment and
properties.
2.1. Safety Notes
Electrical installation and maintenance must be carried out by competent electricians according to local
regulations.
EP-3K-48-AU inverter can only be installed by qualified electrician, and only those who have appropriate
accreditation, as required by local authority.
Do NOT put explosives or flammable materials, e.g. gasoline, kerosene, diesel, oil, wood slab, cotton, or rag close
to batteries or EP-3K-48-AU inverter.
Disconnect AC connection first, then disconnect battery & PV(PV1&PV2), then wait at least 5 minutes (discharge
capacitors) before maintenance to prevent electric shock.
EP-3K-48-AU inverter shall be disconnected completely (BAT, PV & AC) while being maintained.
EP-3K-48-AU inverter can be very hot during working. Switch off EP-3K-48-AU inverter & wait EP-3K-48-AU
inverter to cool down before maintenance.
Keep children away from batteries & EP-3K-48-AU inverter.
It’s NOT allowed to open the front cover of EP-3K-48-AU inverter. This will void the product warranty.
EP-3K-48-AU inverter damaged by improper installation/operation is NOT covered by the product warranty.
2.2. Installation and Maintenance Notes
The battery has been charged more than 60% before being delivered and shall be prevented from short circuit
during transportation and installation.
EP-3K-48-AU inverter/batteries shall be placed in a well‐ventilated place. Do not put the inverter/batteries in
an airtight or badly ventilated place or cabinet. This can be very harmful to system performance & service life.
Keep inverter/batteries away from direct sunshine. Don’t put inverter/batteries close to a furnace or fire. The
can lead battery to leak even explode.
The current capacity of DC power cables (from battery to inverter) should be at least 90A. Use short DC power
cables to avoid high voltage drop & power loss.
Use a multimeter to check the batter voltage & polarity before switching ON batteries. Make sure connections
are correct according to this manual.
Use a multimeter to check the PV voltage & polarity before switching ON PV isolator. Make sure connections are
correct according to this manual.
If you want to store the batteries without using them, they should be disconnected from inverter, and be kept in
a cool, dry, and ventilated environment.
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Battery maintenance operators shall have the knowledge and technical skill for battery maintenance;
All batteries connected in parallel should be of the same model and have same firmware version. This is a design
issue needs to be considered by designer/installer, particularly when replacing batteries or modifying an existing
energy storage system.
This inverter is transformer‐less, therefore the positive pole and negative pole of the PV array are NOT
grounded. Otherwise it will cause inverter failure. In the PV system, all non‐current carrying metal parts (such
as: PV module frame, PV rack, combiner box enclosure, inverter enclosure) should be connected to earth.
Warning: Do not disassemble or break the battery. Its electrolyte can be toxic and damage your skin and eyes.
Warning: follow the following rules during battery installation/maintenance.
a) Take off your watch, ring, and other metal objects.
b) Only use tools with insulated handles.
c) Wear rubber gloves and shoes.
d) Do not put tools or metals above the battery.
e) Switch off inverter & batteries before connecting / disconnecting battery terminals.
f) Battery positive/negative poles should be isolated from ground.
2.3. Signs on the inverter
There are some symbols which are related to security on the inverter. Please read and understand the content of the
symbols before system installation.
This symbol indicates a hazardous situation which could result in injuries, if not avoided.
Risk of Electric Shock and wait at least 5 mins after switching OFF EP-3K-48-AU inverter.
Be careful of high voltage and electric shock.
Be careful of hot surface.
Comply with the Conformity Europeanness (CE) certification.
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Earth terminal.
Please read this manual before installing EP-3K-48-AU inverter.
This indicates the degree of protection of the equipment according to IEC standard 70‐1
(EN 60529 June 1997).
Positive pole and negative pole of the DC voltage (PV & Battery).
This side up, EP-3K-48-AU inverter must always be transported, handled and stored in
such a way that the arrows always point upwards.
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3. Installation
3.1. Product Overview
EP-3K-48-AU inverter is 100% strictly inspected before package and delivery. It is forbidden to put the EP-3K-48-
AU inverter upside down during delivery.
CAUTION
Please check the product package and fittings carefully before installation.
Fig. 2 EP-3K-48-AU inverter overview
1 DC switch 6 Current transformer port
2 Battery input terminals 7 Load connection port
3 PV input terminals 8 Grid connection port
4 Wi‐Fi/GPRS stick 9 LCD
5 BMS communication port 10 breather valve
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3.2. Packing List
Inspect the package and fittings carefully before installation. You should have the following fittings:
Fig. 3 Accessories of the inverter
3.3. Installation Environment
Choose a dry, clean, and tidy place, convenient for installation
Ambient temperature range: ‐25℃ ~ 60℃
Relative humidity: 0 ~ 100% (non‐condensed)
EP-3K-48-AU inverter shall be installed in a well‐ventilated place
No flammable or explosive materials close to EP-3K-48-AU inverter
The AC overvoltage category of EP-3K-48-AU inverter is category III
Maximum altitude: 2000m
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3.4. Installation Tools
The following tools shall be prepared before installation:
Hammer drill
1 Used to drill holes on the wall
Recommend drill dia.6mm
2 Screwdriver wiring
3 Wire stripper Strip wire
Turn the screw to connect rear panel
4 4mm Allen Key
with inverter
5 Crimping tools Used to crimp power cables
6 Multi‐meter Used to check grounding
7 Marker pen Used to mark signs
8 Measuring tape Used to measure distances
Used to ensure that the rear panel is
9 Level
properly installed
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11 Safety goggles Operators wear
3.5. Installation Position
EP-3K-48-AU inverter should be vertically mounted (to ensure fast heat dissipation), please choose a position without
direct sunlight / snow accumulation to install EP-3K-48-AU inverter. Please the installation position is well‐ventilated.
NO
OK
Fig. 4 Installation Position of EP-3K-48-AU inverter
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3.6. Mount EP-3K-48-AU inverter
Step 1: Put the mounting bracket properly on the wall, mark these 8 drill holes using a marker pen. Drill 8 holes (drill
bit 6mm) on the wall.
Step 2: Insert the expansion screw vertically into the hole, note the insertion depth. (not too shallow or too deep)
Step 3: Fix the mounting bracket on the wall using bolts & flat washers.
Step 4: Put EP-3K-48-AU inverter on the mounting bracket.
Step 5: Earth EP-3K-48-AU inverter using the grounding hole on the heat sink.
Step 6: OPTIONAL: you can lock EP-3K-48-AU inverter to the mounting bracket.
Step 5 Step 6
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4. Electrical Connection
CAUTION
High voltages in power conversion circuits. Lethal hazard of electric shock or serious burns.
All work on the PV modules, inverters, and battery systems must be carried out by qualified
personnel only.
Wear rubber gloves and protective clothing (protective glasses and boots) when working on high
voltage/high current systems such as INVERTER and battery systems.
CAUTION
EP-3K-48-AU inverter is intended to be used in PV system with battery storage. If not used as
intended, the protection provided by the equipment may be impaired.
Fig. 5 Electrical connections
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4.1. Battery Connection
Fig. 6 Battery connection (Measure battery wires polarity/voltage before connection)
Step 1: Loosen 4 screws (A) using a screwdriver (Fig. 6);
Step 2: Remove the waterproof cover (B), loosen the cable gland (C), and then remove the stopper (G);
Step 3: Route the battery wires (F) through the cable gland, then connect battery wires using OT terminal (E);
Step 4: Fasten the waterproof cover using 4 screws.
4.2. PV Connection
Recommended DC input cable specifications
Cross‐Sectional Area (mm2)
External Cable Diameter(mm2)
Range Recommended Value
4.0~6.0 4.0 4.5~7.8
Procedure:
Step 1 Prepare PV positive and negative power cables
1. Positive metal contact 2. Negative metal contact
Fig. 7 prepare PV positive and negative power cables
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Step 2 Insert crimped PV positive and negative power cables into corresponding PV connectors
3. Positive connector 4. Negative connector
Fig. 8 prepare PV positive and negative connectors
Step 3 Make sure the DC voltage of each PV string is less than 600V DC and polarities of PV power cables are
correct. Insert the positive and negative connectors into EP-3K-48-AU inverter until you hear a "click" sound, as
shown in Fig. 9.
1. Bayonet
Fig. 9 Connect PV connectors
CAUTION
Before removing the PV positive and negative connectors, ensure that the DC
SWITCH is OFF.
Follow-up Procedure
Use a MC4 wrench to disconnect PV connectors, as shown in Fig. 10.
Fig. 10 Disconnect PV connectors
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4.3. CT / CAN / RS485 / NTC connection
CT (Current transformer) can measure the value and direction of AC current. Refer to Fig. 11 for the correct connection
of CTa.
Fig. 11 CTa connection
Step 1: Refer to Fig. 11 for correct position of CTa. Wrap the CT around L wire of incoming mains, make sure that the
CT arrow direction is “home → grid”.
Step 2: You can use network cable & terminal caps to extend CT wires if necessary, the maximum CT cable length is
200m.
CT wire Extension cable (network cable) EP-3K-48-AU inverter
Red Orange / white orange / brown / white brown CT+
Black Green / white green / blue / white blue CT‐
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Fig. 12 CT / CAN / RS485 / NTC connection
Step 3: Loosen 4 screws (part A) using a screwdriver (Fig. 12)
Step 4: Remove the waterproof cover (part B), loosen the cable gland (part C), then remove the stopper (part G)
Step 5: Route CT cable through the cable gland, connect CT cable to CT terminal, then insert CT terminal into
corresponding ports.
Step 6: One communication cable (between battery BMS & EP-3K-48-AU inverter) is provided in the EP-3K-48-
AU inverter accessory bag. One inverter end, one BAT end.
Route the communication cable (inverter end) through the cable gland, insert the 4P4C connector to
EP-3K-48-AU port. Insert the 8P8C connector (BAT end) to PYLONTECH battery CAN port.
Communication cable between battery & EP-3K-48-AU inverter CAN communication
EP-3K-48-AU inverter
CAN port CANH‐‐‐pin1 CANL‐‐‐pin2
RS485 port 485A‐‐‐‐pin3 485B‐‐‐‐pin4
PYLONTECH US2000 PLUS / US2000B
CAN Port CANH‐‐‐pin4 CANL‐‐‐pin5
485A‐‐‐‐pin2 & pin7
RS485 port
485B‐‐‐‐pin1 & pin8
Step 7: Connect NTC for lead acid batteries only: make the NTC to the battery surface with the tape, NTC can't close
to the positive and negative of the battery, As shown in figure 13
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Fig. 13 NTC connection
Step 8: fasten the waterproof cover using 4 screws.
4.4. Grid Connection
Step 1: Loosen 4 screws (part A) using a screwdriver (fig. 14)
Step 2: Remove the waterproof cover (part B), loosen the cable gland (part C), then remove the stopper (part G)
Step 3: Route a 3‐core cable through GRID cable gland, then connect 3 wires to corresponding terminal blocks.
(BROWN – L, BLUE – N, YELLOW/GREEN – PE)
Step 4: Fasten the waterproof cover using 4 screws.
Fig. 14 Grid & Load connection
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4.5. Critical Load Connection (EPS function)
Critical load: in case of grid outage, if EPS function is enabled, EP-3K-48-AU inverter will work in EPS (Emergency
Power Supply) mode, utilize the PV power & energy stored in the battery to supply power to critical load via LOAD
connection port.
LOAD connection port is only for critical load connection. The power of critical loads must be less than 3000VA.
The connection procedure of LOAD port is the same as grid connection (Fig. 14).
Change-over positions
CAUTION
The changeover switch is necessary.
While checking/repairing critical load, make sure change‐over switch is at position 0.
While checking/repairing EP-3K-48-AU inverter, make sure change‐over switch
is at position 0 & EP-3K-48-AU inverter is disconnected from grid.
Under normal conditions: change‐over switch is at position 1. EP-3K-48-AU inverter can supply power to critical
load in case of blackout.
If the EP-3K-48-AU inverter is faulty, manually change the switch to position 2. Grid will supply power to critical load.
Fig. 15 Change‐over Switch connections
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5. Buttons and indicator lights
Fig 16. Buttons and indicator lights
5.1. Buttons:
press “Back” to the previous screen or enter the main interface;
press “Up” to the upper menu option or value plus 1;
press “Down” to the lower menu option or value minus 1;
Press “OK” to select the current menu option or switch to the next digit.
Alarm ON
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6. Operation
6.1. Double Check
Please double check the following before operation.
1. EP-3K-48-AU inverter is firmly fastened to the mounting bracket on the wall;
2. PV+/PV‐ wires are firmly connected, polarity and voltage are correct;
3. BAT+/BAT‐ wires are firmly connected, polarity and voltage are correct;
4. DC isolator is correctly connected between battery & EP-3K-48-AU inverter, DC isolator: OFF;
5. GRID / LOAD cables are firmly / correctly connected;
6. AC circuit breaker is correctly connected between EP-3K-48-AU inverter GRID port & GRID, circuit breaker: OFF;
7. AC circuit breaker is correctly connected between EP-3K-48-AU inverter LOAD port & critical load, circuit breaker: OFF;
8. For lithium battery, please ensure that the communication cable has been correctly connected;
9. For the lead‐acid battery, please ensure that the NTC wire has been correctly connected.
6.2. First Time Setup (IMPORTANT!)
IMPORTANT: PLEASE FOLLOW THE FOLLOWING PROCEDURE to switch ON EP-3K-48-AU inverter
1. Make sure there’s no power generation in EP-3K-48-AU inverter’s phase.
2. Turn ON DC switch.
3. Switch ON the battery. Turn ON DC isolator between battery & EP-3K-48-AU inverter.
4. Turn ON AC circuit breaker between the EP-3K-48-AU inverter GRID port & GRID.
5. Turn ON AC circuit breaker between the EP-3K-48-AU inverter LOAD port & critical load.
6. EP-3K-48-AU inverter should start to operate now.
You need to set the following parameters before EP-3K-48-AU inverter starts to operate.
1)Set system time 8)*Set min discharge voltage
2)Set country 9)*Set max discharge current
3)Select battery type 10)*Set min protect voltage
4)*Set battery capacity 11)*Set discharge depth
5)*Set max charge voltage 12)*Set empty discharge voltage
6)*Set max charge current 13)*Set full charge voltage
7)*Set max protect voltage
Note: 4)* to 13)* settings are only for DEFAULT battery type.
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1)Set system time
System time format is “20YY‐MM‐DD‐HH‐MM‐SS”, press “Up” or “Down” to change the 1st digit, press “OK” to switch
to next digit, press “Ok” to complete setting. When system time setting is complete, “Set country” will pop up.
2)Set country
Press “Up” or “Down” to select a country, press “Ok” to complete the country setting. When country setting is
complete, “Set battery type” will pop up.
Code Country Code Country Code Country
00 Germany VDE4105 11 France 22 Europe General
01 CEI‐021 Internal 12 Poland 23 CEI‐021 External
02 Australia 13 Germany BDEW 24 Cyprus
03 SpainRD1699 14 Germany VDE0126 25 India
04 Turkey 15 CEI‐016 Italia 26 Philippines
05 Denmark 16 UK G83 27 New Zealand
06 Greece Continent 17 Greece island 28 Brazil
07 Netherland 18 EU EN50438 29 Slovakia VSD
08 Belgium 19 IEC EN61727 30 Slovakia SSE
09 UK G59 20 Korea 31 Slovakia ZSD
10 China 21 Sweden 32 CEI0‐21 In Areti
CAUTION
It’s very important to make sure that you have selected the correct country code
according to requirements of local authority.
Please consult qualified electrical engineer or personnel from electrical safety
authorities about this.
3)Select battery type
Press “Up” or “Down” to select your battery type, then press “Ok” to complete the battery type setting.
If you’re using “1. PYLON”, “2. DARFON”, “4. General Lithium”, “5. Alpha. ESS” or “6. SOLTARO” battery types,
congratulations, inverter’s first‐time setup is complete. Please press “OK” to enter the main interface.
But if you’re using “3. DEFAULT” battery type. We need more information regarding your battery.
MENU Compatible Batteries
1.PYLON PYLONTECH US2000 PLUS / US2000B
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Note: Please confirm with representative of PYLONTECH that your battery
is compatible with EP-3K-48-AU
2. DARFON DARFON 14S31P ESS
3.DEFAULT LEAD ACID / LEAD CRYSTAL / AQUION battery
4. General Lithium All batteries that comply with SOFAR’S BMS CAN communication protocol.
5. Alpha. ESS M48112‐P / SMILE‐BAT
6. SOLTARO SL‐3KWH / SL‐1KWH
4)*Set battery capacity (only for DEFAULT battery type)
Press “Up” or “Down” to change the 1st digit, press “OK” to switch to next digit. After changing the battery capacity
per your battery specification, press “Ok”, then “Set max charge voltage” will pop up.
5)*Set max charge voltage (only for DEFAULT battery type)
Press “Up” or “Down” to change the 1st digit, press “OK” to switch to next digit. After changing max charge voltage
per your battery specification, press “Ok”, then “Set max charge current” will pop up.
6)*Set max charge current (only for DEFAULT battery type)
Press “Up” or “Down” to change the 1st digit, press “OK” to switch to next digit. After changing the max charge current
per your battery specification, press “Ok”, then “Set max protect voltage” will pop up.
7)*Set max protect voltage (only for DEFAULT battery type)
Press “Up” or “Down” to change the 1st digit, press “OK” to switch to next digit. After changing the max protect voltage
per your battery specification, press “Ok”, then “Set min discharge voltage” will pop up.
8)*Set min discharge voltage (only for DEFAULT battery type)
Press “Up” or “Down” to change the 1st digit, press “OK” to switch to next digit. After changing the min discharge
voltage per your battery specification, press “Ok”, then “Set max discharge current” will pop up.
9)*Set max discharge current (only for DEFAULT battery type)
Press “Up” or “Down” to change the 1st digit, press “OK” to switch to next digit. After changing the max discharge
current per your battery specification, press “Ok”, then “Set min protect voltage” will pop up.
10)*Set min protect voltage (only for DEFAULT battery type)
Press “Up” or “Down” to change the 1st digit, press “OK” to switch to next digit. After changing the min protect voltage
per your battery specification, press “Ok”, then “Set discharge depth” will pop up.
11)*Set discharge depth (only for DEFAULT battery type)
Press “Up” or “Down” to change the 1st digit, press “OK” to switch to next digit. After changing the discharge depth
per your battery specification, press “Ok”, then “Set empty discharge voltage” will pop up.
12)*Set empty discharge voltage (only for DEFAULT battery type)
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Press “Up” or “Down” to change the 1st digit, press “OK” to switch to next digit. After changing the empty discharge
voltage per your battery specification, press “Ok”, then “Set full charge voltage” will pop up.
13)*Set full charge voltage (only for DEFAULT battery type)
Press “Up” or “Down” to change the 1st digit, press “OK” to switch to next digit. After changing the full charge voltage
per your battery specification, press “Ok”.
Congratulations, Inverter first‐time setup is complete. Please press “OK” to enter the main interface.
6.3. Commissioning
The main interface:
Fig 17. Main interface
If you didn’t change the work mode of inverter, which means EP-3K-48-AU inverter is working in “Auto Mode”:
While “PV Production” > “Home Consumption”
If the battery is not full. EP-3K-48-AU inverter will charge the battery. While “PV Production” < “Home
Consumption”
If the battery is not flat. EP-3K-48-AU inverter will discharge the battery.
6.4. Menu
In the main interface, press “Down” button to enter grid/battery parameters page:
Main Interface Press “Down”
1.Grid(V)
2.AC Current(A)
3.Frequency
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4.Batt(V)
5.Batt Chrg Curr.
6.Batt DisChrg Curr.
7.State of Charge
8.Batt Cycles
9.Batt Temp.
In the main interface, press “UP” button to enter PV parameters page:
Main Interface Press “UP”
1.PV1 Voltage
2.PV1 Current
3.PV1 Power
4.PV2 Voltage
5.PV2 Current
6.PV2 Power
7.Inverter Temp.
In the main interface, press “back” button to enter main menu. The main menu has the following five options:
Main Interface Press “Back”
1.Basic Setting
“Up” ↑ 2.Advanced Setting
3.Event List
4.System Information
“Down”↓
5.Energy Statistic
6.Software Update
6.4.1. Basic setting
1.Basic Setting Press “OK”
1.Language
2.Time
Up” ↑ 3.Energy Storage Mode
4.PV Input Mode
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5.EPS Mode
“Down”↓ 6.Communication Addr.
7.Auto Test
1. Set Language
Select “1. Language”, press “OK”. Press “up” or “down” to select the language and press “OK”.
Easier Way: press “Back” & “OK” at the same time to change system language.
2. Set Time
Select “2. Time”, press “OK” to enter time setting interface, system time format is 20YY‐MM‐DD HH:MM:SS
Press “Up” or “Down” to change the 1st digit, press “OK” to switch to next digit, after inputting the current time, press
“OK”.
3. Energy Storage Mode
Select “3. Energy Storage Mode”, press “OK” to enter energy storage mode setting interface.
3.Energy Storage mode
1. Self‐use Mode
“Up” ↑
2. Time‐of‐use Mode
3.Timing Mode
“Down”↓ 4. Passive Mode
1) Set Auto Mode
Select “1. Set Auto Mode”, then press “OK”.
In auto mode, EP-3K-48-AU inverter will automatically charge & discharge the battery.
1) If PV generation = LOAD consumption (ΔP < 100W) 2) If PV generation > LOAD consumption, the surplus
EP-3K-48-AU won’t charge or discharge the battery. power will be stored in the battery.
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3) If the battery is full(or already at Max Charge Power), 4) If PV generation < LOAD consumption, it will
excess power will be exported to the grid. discharge the battery to supply power to load.
2) Set Time‐of‐use Mode
Select “2. Set Time‐of‐use Mode”, and then press “OK” to enter Set Time‐of‐use mode interface.
Set Time‐of‐use Mode
Rules. 0: Enabled
From To SOC Charge
02h00m ‐ 04h00m 070% 1000W
Effective date
Dec. 22 ‐ Mar. 21
Weekday select
Mon. Tue. Wed. Thu. Fri. Sat. Sun.
If electricity is more expensive in high demand time (peak rate) & electricity is much cheaper in low demand time (off‐
peak rate).
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You can select an off‐peak period to charge your battery. Outside the off‐peak charge period, EP-3K-48-AU
inverter is working in Auto Mode.
If your family normally go to work/school on weekdays & stay at home on weekends, which means the home electricity
consumption is much higher on weekends. Thus, you need to store some cheap electricity on weekends only. This is
possible using our Time‐of‐use mode.
In summer, if your PV system can produce more electricity than your home electricity consumption. Then you don’t
need to set an off‐peak charge period to charge your battery in summer at all. You can select an effective date
(normally winter) for Time‐of‐use mode in this case. Outside the effective date, EP-3K-48-AU inverter is working in
Auto Mode.
You can set multiple Time‐of‐use rules to meet your more complex requirement. Right now we support 4 rules
maximum (rule 0/1/2/3).
3) Set Timing Mode
Select “3. Set Timing Mode”, and then press “OK” to enter Set Timing mode interface. The interface of Set Timing
Mode is shown as below. You can select a charge time/power & discharge time/power in this mode.
Charge Start 22 h 00 m
Charge End 05 h 00 m
Charge Power 2000 W Note: normally this mode is used to test whether EP-3K-48-AU
DisCharge Start 14 h 00m inverter can charge & discharge correctly or not. So basically, this
mode is used for testing purposes only.
DisCharge End 16 h 00m
DisCharge Power 2500 W
4) Set Passive Mode
Select “4. Set Passive Mode”, and then press “OK”.
For more detailed information, please ask representative of the Supplier to get a copy of passive mode
communication protocol.
4. PV Input Mode
PV input mode selection: EP-3K-48-AU inverter has 2 MPPT channels. The 2 MPPT can operate independently, also
can operate in parallel. If the PV strings are connected in parallel outside the inverter, you should choose the “in
parallel mode”, otherwise use the default setting (independent mode).
5. EPS Mode
1.Enable EPS Mode
1.EPS Mode Control
5. Set EPS Mode 2.Disable EPS Mode
2.Set EPS Changeover Time(default 20ms) ***S()
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1) If PV generation > LOAD consumption (ΔP > 100W), 2) If PV generation = LOAD consumption, HYD‐ES
EP-3K-48-AU inverter will charge battery. inverter wont’ charge or discharge battery.
3) If PV generation < LOAD consumption (ΔP > 100W), 4) If PV generation is normal,but LOAD consumption=0,
the surplus power will be stored in the battery.
EP-3K-48-AU inverter will discharge battery.
6. Communication Addr.
Select “6. Set Communication Addr.”, press “OK”. Press “Up” or “Down” to change the 1st digit, press “OK” to switch
to next digit, after changing the 485‐communication address (default :01), press “OK”.
7. Auto Test (ONLY for Italian Market)
Select “7. Auto Test”, press “OK” to enter autotest interface.
7.Auto Test
1.Autotest Fast
“Up” ↑ 2.Autotest STD
3.QF Time Setting
4.QV Time Setting
“Down”↓
5.Control 81.S1
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1) Autotest Fast
Select “1. Autotest Fast”, then press “OK” to start Auto test Fast.
Start Autotest
↓ Press “Ok” to start
Testing 59.S1...
↓ Wait
Test 59.S1 OK!
↓ Wait
Testing 59.S2...
↓ Wait
Test 59.S2 OK!
↓ Wait
Testing 27.S1...
↓ Wait
Test 27.S1 OK!
↓ Wait
Testing 27.S2...
↓ Wait
Test 27.S2 OK!
↓ Wait
Testing 81>S1...
↓ Wait
Test 81>S1 OK!
↓ Wait
Testing 81>S2…
↓ Wait
Test 81>S2 OK!
↓ Wait
Testing 81<S1...
↓ Wait
Test 81<S1 OK!
↓ Wait
Testing 81<S2...
↓ Wait
Test 81<S2 OK!
↓ Press “Ok”
Auto Test OK!
↓ Press “Down”
59.S1 threshold 253V 900ms
↓ Press “Down”
59.S1: 228V 902ms
↓ Press “Down”
59.S2 threshold 264.5V 200ms
↓ Press “Down”
59.S2: 229V 204ms
↓ Press “Down”
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27.S1 threshold 195.5V 400ms
↓ Press “Down”
27.S1: 228V 408ms
↓ Press “Down”
27.S2 threshold 92V 200ms
↓ Press “Down”
27.S2: 227V 205ms
↓ Press “Down”
81>.S1 threshold 50.5Hz 100ms
↓ Press “Down”
81>.S1 49.9Hz 103ms
↓ Press “Down”
81>.S2 threshold 51.5Hz 100ms
↓ Press “Down”
81>.S2 49.9Hz 107ms
↓ Press “Down”
81<.S1 threshold 49.5Hz 100ms
↓ Press “Down”
81<.S1 50.0Hz 105ms
↓ Press “Down”
81<.S2 threshold 47.5Hz 100ms
↓ Press “Down”
81<.S2 50.1Hz 107ms
2) Autotest STD
Select “2. Autotest STD”, then press “OK” to start Auto test STD.
The test procedure is same as Autotest Fast, but it’s much more time consuming.
3) PF Time Setting
Select “3. PF Time Setting”, then press “OK”. The following will be shown on the display:
Set: *. *** s
Press “Up” or “Down” to change the 1st digit, press “OK” to switch to next digit. After changing all digits, press “OK”.
4) QV Time Setting
Select “4. QV Time Setting”, then press “OK”. The following will be shown on the display:
Set:** s
Press “Up” or “Down” to change the 1st digit, press “OK” to switch to next digit. After changing all digits, press “OK”.
5) Control 81.S1
Select “5. Control 81.S1”, press “OK”. Press “up” or “down” to select “Enable 81.S1” or “Disable 81.S1”, press “OK”.
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6.4.2. Advanced setting
2.Advanced Setting Input Password 0001
1.Battery Parameter
2.Clear Energy Data
Up” ↑ 3.Clear Events
4.Country
5.Anti Reflux
“Down”↓
6.IV Curve Scan
7.Battery Active
8.DRMs0 Control
9.Safety Param.
Select “2. Advanced Setting” and press “OK”, “input password” is shown. Input the password ”0001”, press “Up” or
“Down” to change the 1st digit, press “OK” to switch to next digit, when “0001” is shown on the screen, press “OK” to
enter “2. Advanced Setting” interface.
If “Incorrect, Try Again!” is shown on the screen, press “Back” and input the password again.
1. Battery Parameter
1.Battery Parameter
1)Battery Type 7)Max Discharge (A)
2)*Battery Capacity 8)*Low (V) Protection
“Up” ↑ 3)Discharge Depth 9)*Min Discharge (V)
4)Max Charge (A) 10)*Empty Discharged (V)
“Down”↓
5)*Over (V) Protection 11)*Full Charged (V)
6)*Max Charge (V) 12)Save
Note: 2)*, 5)*, 6)*, 8)*, 9)*, 10)* and 11)* settings are only for DEFAULT battery type.
1) Battery Type (refer to Set battery type)
Select “1. Battery Type” and press “OK”. Press “up” or “down” to select the battery type. Press “OK”.
2) *Battery Capacity (only for DEFAULT battery type)
Select “2. Battery Capacity” and press “OK”. Press “up” or “down” to change the 1st digit, press “ok” to switch to next
digit. Input the value of battery capacity. Press “OK”.
3) Discharge Depth
Select “3. Discharge Depth” and press “OK” to enter discharge depth interface.
Discharge Depth
50%
EPS Discharge Depth
80%
EPS Restore Depth
20%
st
Press “up” or “down” to change the 1 digit, press “ok” to switch to next digit. Input the value of Discharge Depth &
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EPS Discharge Depth per battery specification. Press “OK”.
For example: if Discharge Depth = 50% & EPS Discharge Depth = 80%.
While grid is connected: EP-3K-48-AU inverter won’t discharge the battery when its SOC is less than 50%.
In case of blackout: EP-3K-48-AU inverter will work in EPS mode (if EPS mode is enabled) & keep discharging the
battery till battery SOC is less than 20%.
4) Max. Charge (A)
Select “4. Max. Charge (A)” and press “OK”. Press “up” or “down” to change the 1st digit, press “ok” to switch to next
digit. Input the value of Max. Charge (A) per battery specification. Press “OK”.
5) *Over (V) Protection (only for DEFAULT battery type)
Select “5. Over (V) Protection” and press “OK. Press “up” or “down” to change the 1st digit, press “ok” to switch to
next digit. Input the value of Over (V) Protection per battery specification. Press “OK”.
6) *Max. Charge (V) (only for DEFAULT battery type)
Select “6. Max. Charge (V)” and press “OK”. Press “up” or “down” to change the 1st digit, press “ok” to switch to next
digit. Input the value of Max. Charge (V) per battery specification. Press “OK”.
7) Max. Discharge (A)
Select “7. Max. Discharge (A)” and press “OK”. Press “up” or “down” to change the 1st digit, press “ok” to switch to
next digit. Input the value of Max. Discharge (A) per battery specification. Press “OK”.
8) *Low (V) Protection (only for DEFAULT battery type)
Select “8. Low (V) Protection” and press “OK”. Press “up” or “down” to change the 1st digit, press “ok” to switch to
next digit. Input the value of Low (V) Protection per battery specification. Press “OK”.
9) *Min. Discharge (V) (only for DEFAULT battery type)
Select “9. Min. Discharge (V)” and press “OK”. Press “up” or “down” to change the 1st digit, press “ok” to switch to
next digit. Input the value of Min. Discharge (V) per battery specification. Press “OK”.
10) * Empty Discharged (V) (only for DEFAULT battery type)
Select “10. Empty Discharged (V)” and press “OK”. Press “up” or “down” to change the 1st digit, press “ok” to switch
to next digit. Input the value of Empty Discharged Voltage per battery specification. Press “OK”.
11) * Full Charged (V) (only for DEFAULT battery type)
Select “11. Full Charged (V)” and press “OK”. Press “up” or “down” to change the 1st digit, press “ok” to switch to next
digit. Input the value of Full Charged Voltage per battery specification. Press “OK”.
12) Save
Select “12. Save” and press “OK” to complete setting battery parameters.
2. Clear Energy Data
Select “2. Clear Energy” and press “OK”, “input password” is shown. Input the password “0001”, press “Up” or “Down”
to change the 1st digit, press “OK” to switch to next digit, when “0001” is shown on the screen, press “OK”. If “Incorrect,
Try Again!” is shown on the screen, press “Back” and input the password again.
3. Clear Events
Select “3. Clear Events”, press “OK” button twice to clear all the events.
4. Country (refer to Set country)
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Select “4. Country”, press “OK”, current country setting is shown, input new country code & press “OK”
5. Anti Reflux
5.Anti Reflux Control
1.Anti Reflux Control
“Up” ↑ Enable
Disable
“Down”↓ 2.Reflux Power
***KW
The user can enable “Anti Reflux Control” to limit the max export power to grid.
Select “2. Reflux Power” to input desired max export power to grid.
6. IV Curve Scan
6.IV Curve Scan
1.Scan Control
“Up” ↑ Enable
Disable
2.Scan Period
***min
“Down”↓
3.Force Scan
The user can enable “IV Curve Scan” (MPPT scan) to make EP-3K-48-AU inverter to find the global max power
point periodically to deliver max power from a partially shaded PV array.
The user can input scan period or make EP-3K-48-AU inverter to perform a scan right away.
7. Battery Active
7.Battery Active
1.Auto Active Control
“Up” ↑ Enable
Disable
“Down”↓ 2.Force Active
EP-3K-48-AU inverter can activate flat batteries when needed.
The user can enable “Auto Active Control” to allow EP-3K-48-AU inverter to activate flat batteries automatically. Or
make EP-3K-48-AU inverter to activate the battery right away.
8. DRMs0 control
Select “8. DRMs0 Control”, press “OK”, press “up” or “down” to select “Enable DRMs0” or “Disable DRMs0”, press
“OK”.
9. Safety Param.
9.Safety Param.
1.Set START Parameters
2.Set Safety Voltage
3.Set Safety Frequency
4.Set Insulation
Copy the TXT file to the root directory of SD card.
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Select “9. Safety Param.”, press “OK”, press “up” or “down” to select “1. Set START Parameters”, “2. Set Safety Voltage”,
“3. Set Safety Frequency” or “4.Set Insulation”, then press “OK”.Please
contact technical support for more
information.
6.4.3. Event List
3.Event List
1.Current Event List
“Up” ↑
2.History Event List
“D ”↓
Event list of EP-3K-48-AU inverter, including current event list and history event list.
1) Current Event List
Select “1. Current Event List”, press “OK” to check the current events.
2) History Event List
Select “2. History Event List”, press “OK” to check the historical events. Press “up” or “down” to check all historical
events if there’re more than 1 page of events.
6.4.4. System information interface
4.System Information
1.Inverter Info
Inverter Info (1) Product SN
Software Version
Hardware Version
Power Level
Inverter Info(2) Country
PV Input Mode
Energy Storage Mode
Inverter Info (3) RS485 Address
EPS Mode
IV Curve Scan
Anti Reflux
Inverter Info (4) DRMS Control
PF Time Setting
“Up” ↑
QV Time Setting
Power Factor
2.Battery Info
Battery info (0) Battery Type
Battery Capacity
Discharge Depth
“Down”↓ Max Charge (A)
Battery Info (1) Over (V) Protection
Max Charge (V)
Max Discharge (A)
Min Discharge (V)
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3.Safety Param.
Safety Param.(0) OVP 1
OVP 2
UVP 1
UVP 2
Safety Param.(1) OFP 1
OFP 2
UFP 1
UFP 2
Safety Param.(2) OVP 10mins
6.4.5. Energy Statistic
5.Energy Statistic
Today
PV ***KWH
Load ***KWH
Export ***KWH
“Up”↑ Import ***KWH
Charge ***KWH
Discharge ***KWH
Week
PV ***KWH
“Down”↓
Load ***KWH
Export ***KWH
“Up”↑ Import ***KWH
Charge ***KWH
Discharge ***KWH
Month
PV ***KWH
“Down”↓
Load ***KWH
Export ***KWH
“Up”↑ Import ***KWH
Charge ***KWH
Discharge ***KWH
Year
PV ***KWH
“Down”↓ Load ***KWH
Export ***KWH
Import ***KWH
Charge ***KWH
Discharge ***KWH
Lifetime
PV ***KWH
Load ***KWH
Export ***KWH
Import ***KWH
Charge ***KWH
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Discharge ***KWH
Charge ***KWH
Discharge ***KWH
Select “5. Energy Statistic”, press “OK” to enter Energy Statistic interface, it shows the energy generation and
consumption within a certain range of time. Press “Up” or “Down” to check the daily / weekly / monthly / yearly /
lifetime energy statistics.
6.4.6. Software upgrade
Copy the firmware folder to the root directory of SD card.
Select “6. Software Update”, press “OK”, “input password” is shown. Input the password (”0715”), press “Up”
or “Down” to change the 1st digit, press “OK” to switch to next digit, when “0715” is shown on the screen, press
“OK”. EP-3K-48-AU inverter will start to upgrade the software automatically.
Detailed Firmware Upgrade Procedure:
Step 1 Turn OFF AC circuit breaker (grid & load), then turn OFF DC isolator (battery) and PV switch, then remove
communication waterproof cover. If communication cables (CAN/RS485/NTC/CT) have been connected, loosen their
cable glands before removing cover.
SD card
Step 2 Press the SD card and take it out. Insert the SD card into a micro‐SD card reader, then insert micro‐SD card
reader into a PC;
Step 3 Format the SD card. Copy the “firmware” folder to the SD card.
Step 4 Insert the SD card back to the SD card slot.
Step 5 Turn ON AC circuit breaker (grid), press “Back” to enter main menu. Press “Down” to select “6. Software
Update”, then press “Ok”.
Step 6 “input password” is shown. Input the password (“0715”), press “Up” or “Down” to change the 1st digit, press
“OK” to switch to next digit, when “0715” is shown on the screen, press “Ok” to start firmware update.
Step 7 After finishing firmware upgrade, turn OFF AC circuit breaker (grid), lock the communication waterproof
cover with four screws, then turn ON AC circuit breaker (grid), turn ON DC isolator (battery), turn on PV switch,
EP-3K-48-AU inverter will start to operate automatically.
NOTE: If “DSP communicate fail”, “Update DSP1 Fail” or “Update DSP2 Fail” is shown on the screen, which means the
firmware upgrade is unsuccessful, please turn OFF AC circuit breaker (grid), wait 5 minutes, then start again from
“Step 5”
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7. Technical Data
MODEL EP-3K-48-AU
AC INPUT
OUTPUT
Idle-Consumption < 5W
Efficiency (Peak) 94 %
10 ms ( default)
Transfer Time
Waveform Pure sine wave, THD <3%
DC INPUT (BATTERY)
MPPT number 2
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MODEL EP-3K-48-AU
Monitoring
PHYSICAL
ENVIROMENT
Overvoltage, Deep discharge, Over temperature, Reverse polarity, Output voltage low, Output
Protections
voltage high, Frequency error, Short circuit, Output overload, Reverse power
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8. Troubleshooting
Code Name Description Solution
If the alarm occurs occasionally, the possible cause
is that the electric grid is abnormal occasionally.
ID01 GridOVP The grid voltage is too high EP-3K-48-AU inverter will automatically return to
normal operating status when the electric grid’s
back to normal.
If the alarm occurs frequently, check whether the
ID02 GridUVP The grid voltage is too low grid voltage/frequency is within the acceptable
range. If yes, please check the AC circuit breaker
and AC wiring of the EP-3K-48-AUinverter.
If the grid voltage/frequency is NOT within the
ID03 GridOFP The grid frequency is too high acceptable range and AC wiring is correct, but the
alarm occurs repeatedly, contact technical support
to change the grid over‐voltage, under‐voltage,
over‐frequency, under‐frequency protection points
ID04 GridUFP The grid frequency is too low after obtaining approval from the local electrical
grid operator.
If the alarm occurs occasionally, wait a while to see
if the problem is solved.
The battery voltage is too
ID05 BatOVP If the alarm occurs frequently, check whether the
high
battery overvoltage setting is inconsistent with the
battery specification.
ID07 GridLVRT fault
Check whether too many PV modules are series
connected in a PV string, thus the PV string voltage
(Voc) is higher than the maximum input voltage of
inverter. If yes, adjust the number of series
ID08 PVOVP The PV voltage is too high
connected PV modules to decrease the PV string
voltage to fit the input voltage range of inverter.
EP-3K-48-AU inverter will automatically return to
normal status after correcting adjustments
LLCBus voltage is too high ID09‐ ID12 are internal faults of EP-3K-48-AU
ID09 HW_LLCBus_OVP and has triggered hardware inverter, switch OFF EP-3K-48-AU inverter, wait
protection for 5 minutes, then switch ON EP-3K-48-AU
inverter. Check whether the problem is solved.
Boost voltage is too high and
ID10 HW_Boost_OVP has triggered hardware If no, please contact technical support.
protection
BuckBoost current is too high
ID11 HwBuckBoostOCP and has triggered hardware
protection
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The battery current is too
ID12 HwBatOCP high and has triggered
hardware protection
If the fault occurs occasionally, the possible cause is
that the external circuits are abnormal occasionally.
EP-3K-48-AU inverter automatically returns to
The GFCI sampling value normal operating status after the fault is rectified.
ID13 GFCI OCP between the master DSP and
slave DSP is not consistent If the fault occurs frequently and lasts a long time,
check whether the insulation resistance between
the PV array and earth(ground) is too low, also
check the insulation conditions of PV cables.
The PV current is too high
ID14‐ID15 are internal faults of EP-3K-48-AU
ID14 HWPVOCP and has triggered hardware
inverter, switch OFF EP-3K-48-AU inverter, wait
protection
for 5 minutes, then switch ON EP-3K-48-AU
The grid current is too high inverter. Check whether the problem is solved.
ID15 HwAcOCP and has triggered hardware
If no, please contact technical support.
protection
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high
Check whether the input current is higher than the
maximum input current of EP-3K-48-AU inverter,
ID32 SwBOCPInstant The input current is too high
then check the input wiring, if both are correct,
please contact technical support.
Check the PV input mode (parallel mode/
ID33 PvConfigSetWrong Incorrect input mode independent mode) setting of EP-3K-48-AU inverter.
If it’s incorrect, change the PV input mode.
The GFCI sampling value
ID48 ConsistenFault‐fault between the master DSP and
slave DSP is not consistent
The grid voltage sampling
value between the master
ID49 ConsistentFault_Vgrid ID48‐ID51 are internal faults of HYD‐ES inverter,
DSP and slave DSP is not
switch OFF EP-3K-48-AU inverter, wait for 5
consistent
minutes, then switch ON EP-3K-48-AU inverter.
The grid frequency sampling Check whether the problem is solved.
value between the master
ID50 ConsistentFault_Fgrid If no, please contact technical support.
DSP and slave DSP is not
consistent
The Dci sampling value
ID51 ConsistentFault_DCI between the master DSP and
slave DSP is not consistent
Make sure the battery you’re using is compatible
with EP-3K-48-AU inverter.
Make sure you’ve selected the correct battery type.
EP-3K-48-AU inverter Check the communication cable between battery
BatCommunicaton
ID52 can’t communicate with & EP-3K-48-AU inverter.
Flag Lithium battery BMS It’s recommended to use CAN communication.
correctly.
For PYLONTECH US2000 PLUS battery, and you’re
using RS485 communication, the ADD DIP switch
should be all down.
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Please make sure EP-3K-48-AUinverter is
OverTempFault_ The temperature of heat sink installed in a cool / well‐ventilated place.
ID58
HeatSink is too high
Make sure the inverter is vertically installed & the
The environment temp is too ambient temperature is less than the temperature
ID59 OverTempFault_Env upper limit of EP-3K-48-AU inverter
high
ID60 PE connectFault Check the grounding of AC output PE wire.
The grid current is too high
ID65 unrecoverHwAcOCP and has cause unrecoverable
hardware fault ID65‐ID67 are internal faults of EP-3K-48-AU
The bus voltage is too high inverter, switch OFF EP-3K-48-AU inverter, wait
ID66 unrecoverBusOVP and has cause unrecoverable for 5 minutes, then switch ON EP-3K-48-AU
fault inverter. Check whether the problem is solved.
UnrecoverIpv The input current is Check the PV input mode (parallel mode/
ID68 unbalance, and has triggered independent mode) setting of EP-3K-48-AU inverter.
Unbalance unrecoverable fault If it’s incorrect, change the PV input mode.
The grid current is too high,
ID70‐ID73 are internal faults of EP-3K-48-AU
ID70 unrecoverOCPInstant and has cause unrecoverable
inverter, switch OFF EP-3K-48-AU inverter, wait
fault
for 5 minutes, then switch ON EP-3K-48-AU
The input current is too high, inverter. Check whether the problem is solved.
ID73 UnrecoverIPVInstant and has triggered
If no, please contact technical support.
unrecoverable fault
Check the PV input mode (parallel mode/
UnrecoverPvConfigSet
ID74 Incorrect input mode independent mode) setting of EP-3K-48-AU inverter.
Wrong
If it’s incorrect, change the PV input mode.
Unrecoverable EEPROM
ID75 unrecoverEEPROM_W ID75‐ID77 are internal faults of EP-3K-48-AU
write
inverter, switch OFF EP-3K-48-AU inverter, wait
ID76 unrecoverEEPROM_R Unrecoverable EEPROM read for 5 minutes, then switch ON EP-3K-48-AU
inverter. Check whether the problem is solved.
Relay has triggered If no, please contact technical support.
ID77 unrecoverRelayFail
permanent fault
Please make sure EP-3K-48-AU inverter is
installed in a place without direct sunlight.
Please make sure EP-3K-48-AU inverter is
Internal temperature is too
ID81 Over temperature installed in a cool / well‐ventilated place.
high.
Make sure the inverter is vertically installed & the
ambient temperature is less than the temperature
upper limit of EP-3K-48-AU inverter
ID82 Over frequency AC frequency is too high
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Long dist Load EP-3K-48-AU inverter receives a remote
ID83 Remote power derate
Shedding signal to decrease its power.
Switch OFF EP series HEP-3K-48-AU inverter receives a remote signal to
ID84 Long dist OFF
inverter remotely switch OFF.
For example, if you set DOD to 30%, when SOC is
less than 70%, you will see ID85 in the event list.
SOC <= 1 ‐DOD EP-3K-48-AU inverter won’t discharge the battery
ID85 or when ID85 is present.
Battery voltage is low Or this is an indication of low battery voltage.
EP-3K-48-AU inverter won’t discharge battery in
this case to ensure long battery cycle life.
Software version is Contact technical support to upgrade
ID94
not consistent software.
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