Solar Power DIY Handbook
Solar Power DIY Handbook
Solar Power DIY Handbook
Baiano Reeves
Table of Contents
Introduction
Testimonials:
Chapter 1: What Should You Know About Solar Power?
Chapter 2: Fundamentals Of Electric Circuits
Chapter 3: Mechanisms Of Solar Panels
Chapter 4: Choosing Batteries: Lead Acid or Lithium?
Chapter 5: How To Choose Your Wire And Fuse Box
Chapter 6: Types Of Switches
Chapter 7: Inverters And Charge Controllers
Chapter 8: Batteries Without The Solar Panel
Chapter 9: How To Split Several Devices In A Single Circuit
Chapter 10: Placement And Direction Of Panel
Chapter 11: Sourcing- Buy Premade Or Built
Chapter 12: Grid Tie Solar
Chapter 13: Off-Grid Solar Survivalists
Chapter 14: RVs And Solar Boats
Chapter 15: Upcoming Solar Technologies
Conclusion
Introduction
I want to thank you and congratulate you for downloading the book, "Solar
Power DIY Handbook: How to Connect Your Off-Grid Solar Panel to a
12Volts Battery".
This book has actionable information on how to connect your off-grid solar
panel to a 12 volts battery.
What is more; once you have successfully done it once, it is a lot like
learning how to ride a bicycle- you never forget, or have to relearn the
process again. If you are thinking about installing a solar panel for your
home or office, this book is especially handy, as it takes you through the
whole process from start to finish.
This book gives you explicit instruction on solar technology. It explains all
you ever need to know about solar power as well as solar panel installation.
By the end of this book, you would be able to look at solar panel
installation as a relatively simple process, with the prospect of a little fun
involved. Let's begin.
Thanks again for downloading this book. I hope you enjoy it!
© Copyright 2018 by Revisa Publishing LLC - All rights reserved.
The trademarks are without any consent, and the publication of the
trademark is without permission or backing by the trademark owner. All
trademarks and brands within this book are for clarifying purposes only and
are the owned by the trademark owners themselves, not affiliated with this
document.
Testimonials:
“This book was written as a guide for solar and clean energy enthusiasts to
navigate this novel technology and make informed decisions on
incorporating this technology to save money and energy at home, and in
other leisurely activities such as travelling(boats and RVs).”
Dave Litcum, Michigan
I read this book and walked away with at least the confidence of holding an
intelligent cocktail conversation and also felt brave enough to tackle that
secret desire I always had of being a survivalist who goes off-grid and free
myself from the trappings of today's society. I now have my home grid-tied
to Solar Panels and it saves me a bit of money monthly.
Jeffrey Hall, Atlanta
Ask yourself the following questions before you install solar panels.
If your roof is all right for panel installation, make sure that it is strong
enough. Consider renovation if the roof's shape is not as good as it should
be. If you have to conduct revisions on your roof a few years down the line,
it would cost you money to have the solar panels disconnected, and then set
up again.
#2: Can you say you have done all you can to
maximize efficiency?
Put simply, the solar energy amount that you intend to produce would
depend on the energy you use. It makes all the sense in the world to trim
your energy use as much as you can. Perform an energy audit at your home,
install as many energy efficiency upgrades as you can and then think about
drawing up those solar energy blueprints you are so itchy to draw up.
If you have known your home to use lots of energy, especially for heating,
or you live in the sort of place that comes with high heating fuel bill,
meaning an investment in solar thermal technology could save you much
money going forward. However, there is a reason why you perhaps did not
know there were two solar energy technologies: very few people ever have
solar thermal technology installed in their homes. This information deficit
means that you may have a much harder time installing this technology. If
you decide to go for a qualified installer, then you may end up throwing a
lot of dollars at him, or her.
If you have no idea what those last two sentences allude to, they are
referring to net metering. Utilities are supposed to reimburse solar at about
the same rate they charge electricity users. Before you start beaming,
understand that this particular area is rife with political shenanigans. Look
at the state of Nevada, for instance, which has policies in place that
reimburses peanut amounts, making it difficult to recoup installation costs.
No matter which part of the US you live, you get refunded for sure if you
connect to the grid: however don't get your hopes up too much.
Having answers to the questions above in mind, now you can begin getting
a bit technical with solar power installation. Let's start by learning the
fundamentals of electric circuits because it is the core of installing solar
power.
Chapter 2: Fundamentals Of Electric
Circuits
This chapter guides you through the fundamentals of an electric circuit:
#2: Capacitor
To correctly understand the capacitor, think of it as a battery that has
insufficient capacity. In simpler terms, this is an over-glorified battery, so to
speak, that gets charged and discharged in the same way a battery is. The
capacitor's work is to introduce a "time delay" in your circuit. A capacitor is
most commonly employed to remove electrical "noise." In other words, it
ensures that the circuit voltage is as stable as possible.
Diagram of a capacitor
Just a bit of current running through the base provides current amplified to
100 times (this is dependent on the transistor you are using). It is this effect
that is used to construct amplifiers.
Diagram of a transistor
#5: Inductor
The inductor is somewhat weird. The inductor is a coil of wire, and you can
quickly make one by making several loops on some wire. At times, the
inductor is wound around a metal core. Inductors act as filters in the circuit.
Diagram of an Inductor
Here is some technical information that, while not being too vital in the
general scheme of things, gives you some perspective on just how much
energy the sun has to offer. Every square meter of the earth's surface gets up
to 164 watts of energy from the sun. Look at it this way: you could set up a
very potent table lamp (say, a 150-watt lamp) on every square meter and
pretty much illuminate all of the earth using solar power. This is quite
impressive, is it not? However, if this looks a little too fancy to digest, then
consider this other example: if just 1% of the Sahara desert were to be
covered with solar panels, the solar energy produced would be sufficient to
power the entire world. What I am saying is simple; there is an awful lot of
the sun's energy to go around!
On its own, a solar cell is not much use; you could not derive enough
electricity from it. Solar cells are usually bundled together to form larger
electrical units known as solar modules. These modules are themselves
bundled together to form even larger electrical units that the world refers to
as solar panels. At times, they are "chopped" into portable chips so they can
power small-sized electronics, such as pocket watches and calculators.
What you have read up to this point is a very simplified illustration. Let us
take a closer inspection on the subject:
When you place a layer of the latter on a sheet of the former, a wall forms at
the junction. No electrons can pass this barrier. However, this ceases to be
the case when light shines on this silicon sandwich. As the photons, or light
particles, enter the silicon sandwich, they "give up" the energy they carry to
the silicon atoms. This incoming energy blasts electrons out of the lower
layer so that they leap across the barrier to the top layer and then flow out
and around the electrical circuit. The more light shone, the higher the
number of electrons that are knocked off, and the larger the current derived.
Scientists like to refer to this phenomenon as the photoelectric effect.
Now that you know how solar panels work and understand the different
terms you may come across in the book, let's look at batteries.
Chapter 4: Choosing Batteries: Lead
Acid or Lithium?
What is the superior battery type?
So very many off-grid energy systems have dead lead acid batteries around
the US that a documentary covering all of them would run for years before
exhausting them all. Moreover, it is difficult to blame the door of the lead-
acid batteries: they are designed to work for a few years, which is what they
do before fading and losing their charge depth. Lithium-ion batteries, on the
other hand, while considerably more complicated than their lead
counterparts, have some notable advantages. There is no argument that
lithium batteries are superior. Let us examine exactly why this is so:
Lithium-ion battery
Advantage #1: The size and weight of the lithium battery are superior
Lithium batteries are a lot smaller than a lead battery. In fact, lithium
batteries are only a third the size and weight of the typical lead battery. The
charge capacity is similar to that of the lead battery, something made
possible by the lithium battery's superior energy density. The higher energy
density improves deployment and installation to a considerable degree.
As you may well know, all batteries may be quickly and extensively
damaged when excessively discharged. The same is the case when the
battery is stored at extreme temperatures. However, the lead battery is a lot
less tolerating of this roughhousing and is inevitably damaged when
repeatedly discharged too quickly. If the lead battery is discharged below
half its State of Charge (SOC) or discharged faster than C/8A (C8 rating
means the battery is completely discharged over a period of 8 hours), it
loses potential cycles.
Let us talk battery prices. It is no secret that the lithium battery costs you a
lot more dollars than the lead battery. With time, this will change, and the
lithium battery will cost a lot less (projections say that in a few years, prices
will drop below $400 per kWh). As is the case with many things, a lower
price for a particular product (Lead battery)compared to another(Lithium
battery) does not always make it cheaper. Some wise fellow once said
"cheap is expensive": this is what we are alluding to.
Look at it this way: a lead battery, while costing less, will require lots of
maintenance and you will surely have to replace it after some time. A
lithium battery, while costing more, requires minimal maintenance; it is a
lot more tolerant to rough treatment and has a lifespan equaling that of, say,
3-4 lead batteries.
What do you do at this stage?
The lithium battery is undoubtedly the better battery. Still, the lead battery
has served the world for nearly two centuries, so it cannot be vilified. If
money is a problem, start out with the lead battery, while looking to move
to the lithium battery in the future.
Now that you know about batteries, solar panels and other valuable
information that you need to get started, let's talk about wires and the fuse
box that you need for the installation.
Chapter 5: How To Choose Your Wire
And Fuse Box
3 c) Choose the fuse amperage that falls near the midpoint of the
maximum and minimum fuse amperages. Midrange values provide you
with the best possible balance. While the wire protection is not as excellent
as it is with minimum fuse amperage, you do not have to deal with constant
nuisance blows. Along similar lines, while nuisance blows are not entirely
off the table, you get better wire protection compared to maximum fuse
amperage. Now we have to choose a Fuse housing.
#4 Fuse Box
Consider environmental factors: Fuse boxes that come with insulation
covers are great for protecting the fuse from accidental shorting. If you live
in a humid place and especially one where there are inflammable vapors
present, it is best to have a fuse box that comes with ignition protection.
Accumulated flammable vapors could well take out your fuse and the
electric circuit. Ingress protection (IP is an equipment rating of the
resistance to penetration by water or chemicals) on the fuse box protects
your fuse from wash down, spray and even humidity.
a) Fuse blocks mount easily on solid surfaces and have the capacity to hold
multiple fuses
b) In-line fuse holders are compact, and they are ideal as low-amperage fuse
holders
The toggle switch is actuated by a lever that angles in "one of two or even
more positions." The common light switches in your house are examples of
toggle switches. Most toggle switches come to rest in any of the lever
positions in their array. Think about your light switches: One you switch on,
the switch comes to rest at the "ON" position until you turn it off, at which
point it rests at the "OFF" position. Some toggle switches have an inbuilt
spring mechanism that returns the lever to a default "normal" position.
These switches get actuated via a rotary knob or a lever, to select one
position out of two or more positions. Like is the case with the toggle
switch, the selector switch may rest on any of the positions in the switch's
array, or have an in-built spring system that allows for momentary
operation.
The joystick switch has a lever that is free for motion in more than one axis.
Think about the analog button in a joystick, where you get to rotate it in
multiple directions without restriction. The flexibility is not quite at that
level here, but it gives you an idea. One or more than one switch contact
mechanism out of several gets actuated, and this is dependent on the
direction that the lever is pushed. At times, this is dependent on how FAR
the lever gets pushed. We are not ruling this switch type out entirely, but it
is unlikely that the joystick switch would be a fixture in your electric
circuit: these switches are mainly used to drive crane or robots
Proximity Switch
This switch type senses the shaft rotary speed, and they do this either by a
mechanism that senses centrifugal weight or by non-contact shaft motion
detection. This detection could be magnetic or optical.
Diagram of a speed switch
The solar inverter works to convert solar power to 240 volt AC directly. To
put it simply, with an inverter, when the sun is shining outside, and the solar
panel is picking up its energy, you can use the power produced in your
house directly from the panels without having to cycle your batteries. To
charge your batteries, you need to pair the battery up with a battery inverter
that is compatible. This battery-battery inverter pairing is referred to as AC
coupling, seeing as the link is with AC electricity in this scheme.
The charge controller works to take DC solar power produced from the
solar panels and directs it to the batteries for charging. The primary function
of the charge controller is to regulate the power that gets to the battery, so as
not to overcharge them and risk damaging them. This regulatory function is
why some people refer to them as regulators.
The power thus stays in DC format all the way from the solar panels to your
batteries. It only goes through 240 volt AC conversion when the time to use
it in your house is nigh. This conversion is made possible via the battery
inverter we discussed above. This conversion coupling is called DC
coupling, seeing as the DC solar panels get coupled with the DC charge
controller, with the ultimate goal of charging up the batteries.
Charge Controller
The difference is that while the solar inverter is AC coupled, the charge
controller is DC coupled.
There are many reasons as to why anyone would prefer to opt for one and
not the other and the argument can be made that it is healthy to have both
options in your system.
Let us begin at the beginning: a 12-volt battery is… not a 12-volt battery.
The 12-volt tag is merely a nominal and convenient term that is used to
distinguish one battery type from another. A 12-volt battery that gets fully
charged and then allowed to sit or "rest" for several hours, even days, with
absolutely no load drawn from it and no charge going into it even out its
charge and measures around 12.6 volts between its terminals.
No 12-volt battery in the world will be able to stay at 14+ volts for more
than a few seconds unless you have hooked it up to the solar panel. Also,
while we have said that the useful limit is 10.5 volts, you are merely asking
for trouble if you consistently allow your battery levels to fall below 12.5
volts. If the resting voltage reaches 12.1, you have a deep discharged one
cycle, and the battery's life only gets shorter. Here is a tip for you: If you
have some friends who have picked up RV experience or especially own
RVs, ask them everything you would like to know about battery usage.
They are, more often than not, significant resources for battery knowledge
seeing as they depend on batteries to watch TV and have light at night.
Water your batteries AFTER charging, unless the plates had been exposed
before charging. If the plates are exposed, ensure around 1/8 height of water
covers the plates.
Check the water level after charging and ensure that it is ¼ below the fill
tube bottom in the cell cover. Moreover, you should not just top up with
water from any place: it means a lot to your battery that the water you top it
up with is distilled and does not exceed 200TDS (TDS stands for total
dissolved solids.)
The image below gives a summary of what some of the different items we
have discussed above do.
1: Hook them all up into a series circuit, where the current flows from one
device to the next or
2: Connect them in a parallel circuit where the current flows via several
different paths, with each one having its circuit.
For ease of understanding, this chapter will not illustrate how to hook up
your solar connection to various devices in your house; instead, it shows
you how to hook up several simple devices in a simple circuit. This way,
you can quickly understand how to set up a parallel circuit, and transfer this
knowledge when setting up your home circuit.
Let us explore how to set up a parallel circuit, with multiple devices split in
a single circuit:
Step #1: Gather the primary components of your parallel circuit
You only need a few things to complete this simple project. You need a
power source, naturally, two loads (loads are the items that use electricity),
conducting material (wires) and a switch.
A switch is not much work to find. Any hardware store will have some.
Cut your 35-40 inch wire into five pieces. Each piece should be around 6 to
8 inches.
Remove around 1.5 cm of insulation from both ends of the pieces. Use wire
strippers or scissors for this. You could still attempt to "skin" the wire ends
using your fingernails, or burn the insulation off as many people do, but you
risk damaging the wire.
Connecting this should be easy enough: Attach a wire to the positive battery
terminal and wrap the other end around the left side of one light bulb.
Take a separate wire switch and then connect it to the negative battery
terminal. Proceed to take the other wire end and hook it up to the switch.
Take your 4th wire piece and then wind it around the left light bulb side,
then wrap the other wire end around the 2nd light bulb's left side.
You should have at least one remaining wire piece. Wrap this wire around
the right side of your first light bulb and then take the other end and wrap it
around the right side of your second light bulb.
This is elementary stuff: turn your switch on: both light bulbs should get
turned on.
The above is a simple circuit with simplistic devices in it. However, by and
large, parallel connections take up this format.
There is a general rule here: if you reside in the US, or just about anywhere
else in the Northern Hemisphere, you want your panels to face true south.
True south enables your solar panels to pick up the maximum amount of
sunlight, helping you generate more electricity and in so doing, save money
on those pesky electricity bills.
When you look at your compass, the south direction it points to is the
magnetic south. It is not the true south.
The compass points to the Earth's geomagnetic field's south. If you did
grade school geography, you likely know that the Earth's inner core is fluid.
The nickel and iron components of this fluid outer core pull the compass
needle a little way from the true south.
If your roof does not face south, where do you install your panels?
Suppose your roof faces east-west? Well, if you go ahead and install your
panels, you would have to live with less light reaching your panels. You
have a few options, however:
You can increase the solar collection area, either by shopping for more
panels or increasing the collector area.
You may also use racks that orient your panels southward. About these
racks: the thing is that they add to installation costs, most times to the point
of inefficiency. Racks are rarely if ever, used in the installation.
You can mount your panels in another area that is not your roof. There are
some who opt to mount their panels on, say, a southward facing wall. If
your yard has ample space, you can install your panels on the ground. This
latter method makes maintenance easy. You can even place your ground
panels on trackers which adjusts your panels' orientation throughout the
year, maximizing their collection of sunlight.
There is something called the "ideal solar panel tilt." This angle is
calculated based on the latitude of the site. A simple rule that you can
follow in the US is to multiply the latitude by 0.76, and then add 3.1
degrees.
Let me take the discussion a little further by talking about sourcing for
premade or building the solar power systems from scratch.
Chapter 11: Sourcing- Buy Premade
Or Built
The DIY solar panel kit is appealing as far as costs go. Moreover, in truth,
many people have found a lot of success and joy from DIY solar panel kits.
However, before you overlook premade solar panels and go full DIY, read
this chapter carefully, then make your decision.
The truth is that it is scarce for a solar panel DIY kit to include all the parts
that are necessary for full installation. You will need to make an extra trip to
the shop for wires, breakers, conduit fittings, AC/DC disconnects, sub panel
and junction boxes. The deficiencies do not stop here: the parts that you
find in your kit rarely ever boast of the same efficiency levels as those
found in pre-built panels. This book does not mean to slight any regions,
but the truth is that the bulk of DIY parts are, in some capacity or other,
sourced from China. Make of that what you will. Efficiency levels, it
follows, are mediocre and underwhelming. Moreover, if you believe that
efficiency is something that you can overlook, think hard: the better the
panel efficiency, the more likely it is that your electric bills get lighter. Also,
with low-efficiency panels, well, the only way to fight the efficiency
problems is to stack as many of them on your roof as is possible. Do you
have that much roof at your disposal?
It is time to consider cost versus value. These days, the dominant solar
power companies out there will not only handle shipping issues, but they
also provide personnel to install the panels for you. You will have a
warranty to prop you up, a superior product on your rooftop and all round
assurance that your product will hold up and do so well.
DIY solar panels call for you to hire an installer or install it yourself. You
may also need to stack more panels on your roof to produce enough
electricity. Both of these require money or time. The upfront costs may
seem sweet with DIY kits, but the installation costs and maintenance
headaches mean that you would not be saving up on much, compared to
buying premade panels. It is best to purchase premade panels from
reputable companies: you would be grateful for this decision 5 years down
the line.
With what we have discussed in mind, let's now move on to talking about
grid tie solar.
Chapter 12: Grid Tie Solar
This chapter examines how a grid-tied system works. As far as your solar
connection goes, you have the option of either getting hooked up to the
grid, in this case having a grid-tied system or going full Kaczynski mode
and having it off-grid.
There is nothing complicated about this one: this is merely a solar system
that is hooked up to the electrical grid. Therefore, you can use electricity
from your solar panels as well as that from the electrical grid. If you cannot
afford to have as many solar panels as are required to run everything in your
home even after doing a usage efficiency evaluation, then having a grid-tied
system is ideal. So if anything, winter would not have to bring a scowl on
your face, seeing as so many days have little to no sunlight available.
Reliability: Solar power systems are not perfect power systems. There are
days when efficiency is reduced, or when the weather is so bad that your
electrical appliances may well be running on fumes. An off-grid system is
likely to run out of power, leaving you in the dark. This is not so for a grid-
tied system. If your solar system is not providing sufficient power, power
gets pulled from the electrical grid. The grid is your back up, in case of
power failure.
Costs: For you to function at optimal levels, off-grid systems require you to
install specialized equipment. This equipment often gets expensive fast. It is
also simple math that less equipment means fewer costs directed toward
equipment purchase. Such is usually the case with most grid-tied systems.
Not only will battery costs not be your concern, but you would not have to
deal with such issues as battery maintenance and deep cycling.
Net metering: There would be days when your system produces way more
electricity than you could use. With a grid-tied system, you are in a position
to feed this excess electricity to the grid. Enter the net metering concept: net
metering is a billing system that compensates you for supplying your power
to the grid. Since most grid-tied systems are net metered, the power meter
then tracks the "power exchanges" between your home and the grid. With
excess power production and the feeding of this excess power to the grid,
the power meter, rather than spin forward, spins backward. The result is
some credit that you can either pocket or use to handle future power-based
payments.
Also, if you do not want to go through the headache of paying the utility
company, you could go off grid. Let's discuss that next.
Chapter 13: Off-Grid Solar
Survivalists
This chapter covers the necessary steps to set up your off-grid system. In
truth, the bulk of these steps feature even when installing a grid-tied system.
However, you have to be a lot more vigilant with an off-grid system. In case
of malfunctioning, you would not have the handy backup that is the
electrical grid. So if you set up your system poorly, well, you then have to
suffer in silence for a long time.
Here are the necessary steps when setting up your off-grid system:
Step #1: Figure out just how much power you need
Would you plan a Kazakh road trip without understanding how many miles
you to get that and by extension, how much gas you need? It is a bit
foolhardy, is it not? You cannot only declare that you would invest in 4
solar panels and two batteries and hope that it is all you need. Remember
that everything gets powered by your system. Understand exactly how
much power you need. You can refer to this resource, this resource and this
resource for help on how to determine your home power requirements.
Once you know how much power you need, it is necessary to figure out the
number of batteries required to store this power.
Do you need to only store power for two days at most or would you like to
have enough power stored for 4 days and beyond?
Take your location as well as times of the year into consideration. It is well
and good to know how much power you require but it is just as important to
know how much sun is available to harvest. Use the worst case scenario for
your particular location. This way, you are in no danger of ever running out
of power. You can refer to (https://us.sunpower.com/blog/how-many-solar-
panels-do-you-need-panel-size-and-output-factors/), this resource
(https://solarpowerrocks.com/square-feet-solar-roof/), and this resource
(https://home.howstuffworks.com/green-living/question418.htm) to
determine how many solar panels you need.
This book has already covered both the solar charge controller and inverter.
To have your system as efficient and optimal as possible, it is necessary to
have both. You can refer to this resource and this resource to determine the
solar charge controller to purchase. As for the inverter, you can refer to this
resource and this resource.
This final step is more like several final steps that you need to take:
Do you have the best possible fuse and fuse box? There is no room for
gambling with an off-grid system. This book has already covered the fuse
and fuse box issue.
How are you going to mount your panels? Will you have them on a rooftop
or the ground? Will you do it yourself or will you have somebody else to do
it for you?
Note: Much of what we have discussed up to this point should help you to
set up an off-grid solar power system. As I already stated, it is often best to
work with professionals (I already gave my reasons). As such, to ensure
you do not void your warranty and experience different other problems with
solar panel installation, it is best to involve a professional, even if for
consulting purposes only.
The other thing we will address is powering your RV or boat using solar.
Chapter 14: RVs And Solar Boats
To get as close to living a healthy life as an RV enthusiast as possible, you
will need to have electricity in the RV. The same applies to boats. While
some eccentrics like to lug generators around in their RV, most people with
sense know that solar panels are the way to go. As long as the installation is
done competently and you do not park your RV in the shade all the time,
solar panels give you all the power that you need. This chapter covers the
most necessary elements, as far as RV and solar boat panels go.
There are 3-panel types for you to choose from if you are the proud owner of
an RV or solar boat:
These panels are made from a single crystal. The individual cell in this panel
is a wafer-thin crystal of silicon.
#2: Poly-crystalline
#3: Amorphous
These panels are thin panels of film. The cells are composed of a thin silicon
layer and fix to the backing material.
What is the best RV or boat panel for you?
The smart RV/boat owner looks upon his roof as though it were prime real
estate deserving of only the best kind of panel for it. Moreover, there is more
to this than the simple nature of that sentence suggests. Let us examine all 3
options:
Flexible panels for the RV: What is the difference between flexible RV
panels & rigid solar panels?
This is the latest solar technology. Some people like to call them "thin film
panels" which has to be okay considering that is precisely what you think of
them once you lay your eyes on one.
Advantages
They are light- exceptionally so, actually, and you can stack a lot of them on
your boat or RV roof without being afraid that the C.O.G of your vehicle
gets raised up too much.
You can install these panels directly on the RV roof, due to their thin and
lightweight nature, which allows more streamlined form for your RV or boat.
Also, the whole setup ends up looking very aesthetic indeed.
Disadvantages
The paragraph above says that you can install them directly on your roof. If
you do decide to install them directly on the RV roof, then you would have
to walk on them at some point. The flexible solar panel manufacturers like to
tell you that no harm will be done from walking on the solar panel but in
truth, they will eventually develop tiny cracks that will affect the output and
cut the panel lifespan.
These solar panels come with a 10-year warranty. Are you impressed? Well
if you are, you really shouldn't be. Their counterparts come with 30-year
warranties.
Heat buildup is always a factor with solar panels. The more space you have
between the solar panel and the roof, the cooler the panels will stay. This
will enable them to generate maximum power as conditions will be close to
optimal. Flexible panels are fixed to your roof, and heat buildup will go right
into the roof interior. During winter months, this can have a significant effect
on power production. You may have to be content with less power
production in the summer months.
Installation of your flexible panels will mean that you glue them to your
roof. It is not so hard to glue them onto the roof, but you will have a difficult
time taking them off the RV or boat roof once you decide to change vehicles.
Flexible panel
These panels are hard, and they are usually fixed firmly. Their construction
is one of the glass panes within an aluminum frame. They are far more
conventional than their flexible counterparts.
Advantages
We will start with the most obvious one: these panels are far more durable.
They can take multiple beatings that come with RV or boat travel. If you are
looking to own your RV or solar boat for a long time, these will be ideal.
If you are the sort that is very conscious about the environment, silicon, the
material the solar cells of these panels are made of, is more friendly to the
environment and poses fewer problems when disposal/recycling time comes.
Disadvantages
They do stick out above your roof and maybe an eyesore if you are into
aesthetics.
At the end of the day, glass is breakable. The panels are made to withstand
harsh climatic conditions, sure enough, but this fact still stands.
How many solar panels do you need for your RV?
Panels come in varied watt sizes. Depending on the size of your RV or boat
space, if you cannot fix one big solar panel, you have the option of getting
two panels with the same wattage. For example, if you have calculated that a
120-watt panel will well handle your power needs, you can get one 120 watt
panel or two 60 watt panels.
Chapter 15: Upcoming Solar
Technologies
Solar technology made its cameo in 1905, and since then, there has been
much evolution with regard to it. Today, there are a series of new
developments that have filled the solar landscape with much promise. If the
same innovative pace is maintained, much of the world will move to solar
technology in the future. Solar technology, already clean and abundant, will
present a package far too attractive to ignore or even downplay.
This chapter will look at some of the most recent solar technology
developments. Some of the technology is a bit on the sophisticated side, but
this book will do a job in presenting it in the most straightforward manner
possible. However, first, a bit of preamble:
Solar panel efficiency has long been the elephant in the room. Every time
scientists converge in an attempt to make solar technology superior; you
can bet your house that improvement of efficiency levels is their main bone
of contention. A solar PV (Photo Voltaic) system comprises hundreds of
solar cells. Sometimes, there are thousands of them. A typical solar cell
only has a 15% efficiency level meaning that 85% of the sunlight that hits
the cell goes to waste. Scientists are keen on making the light capture to
conversion ratio more favorable- whichever way you read it, 15% is
unimpressive.
This one has its home in the University of Toronto. Recently, scientists at
the University unearthed a light-sensitive nanoparticle, which they referred
to as "colloidal quantum dot." If this technology is expounded on, the result
will be a far more efficient solar capture material at a less expensive price,
at least compared to the conventional solar panel. Light sensitive
nanoparticles do not precisely constitute breakthrough technology so why is
this here, considering that this particular University of Toronto project is
still at the infancy stage? Well, nanoparticle tech breakthroughs of the past
have always been trapped in the straitjacket of being non-functional in the
outdoors. This particular project has brought forth nanoparticles which can
indeed work outdoors. Read the paragraph below to understand further:
The colloidal quantum dot, unlike other nanoparticles, does not bind to air
(well, the binding is often with the oxygen part of air, if you like specifics).
This quality allows for it to maintain stability outdoors and still do its job.
Scientists have already attempted to make some panels using this new
technology, and since they are not ready to be commercialized yet,
efficiency levels have been recorded at 8% more than the conventional
panel.
A research team at the Imperial College, London, believes that they have
come across the future of solar technology. They have discovered gallium
arsenide; a material they firmly believe will multiply efficiency levels by up
to 3 times. Solar cells made from this material have been christened the
same "triple junction cells," and their bloated efficiency levels is as a result
of chemical alterations that allow maximum sunlight capture an electric
conversion.
The result is that solar plants can operate at far higher temperatures- up to
500 C- which would naturally lead to much higher power output. Solar
storage costs would be significantly reduced with this technology, and the
utility companies would finally be able to employ solar power plants as the
base load plants, as opposed to giving them the usual auxiliary "top up"
role.
The secret to this cheap, albeit more efficient design, is that the battery is
built into the solar panel, as opposed to being a different entity from the
solar panel, as is the case with most setups today. By having the two come
as one package, these scientists have determined that costs will be lowered
by up to 25%, compared to what is available today.
Conclusion
We have come to the end of the book. Thank you for reading and
congratulations on reading until the end.
This book has done way more than teach you how to hook up your solar
panel to your 12-volt battery. In truth, this book's primary objective was to
illustrate that solar technology and solar panel installation is not as
complicated as so many people make it. An installation professional will
still likely put up a more refined setup than you are capable of but the truth,
as this book outlines ever so candidly, is that you could very well install
your system by yourself.
If you found the book valuable, can you recommend it to others? One way
to do that is to post a review on Amazon. I also enjoyed writing this as my
first book. I need the encouragement if I can be honest.