Energy consumption in Tonga

The most important figure in the energy balance of Tonga is the total consumption of

69.14 million kWh

of electric energy per year. Per capita this is an average of 661 kWh.

Tonga can completely be self-sufficient with domestically produced energy. The total production of all electric energy producing facilities is 75 m kWh, also 109 percent of own requirements. The rest of the domestically produced energy is either exported into other countries or unused. Along with pure consumption, the production, imports and exports play an important role.

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Energy Balance

Electricity	total/year	Tonga per capita	USA per capita
Own consumption	69.14 m kWh	660.97 kWh	12,325.52 kWh
Production	75.14 m kWh	718.34 kWh	12,814.53 kWh

CO₂ emissions

	CO₂ emissions in 2022/year	Tonga per capita	USA per capita
total	131,000.00 t	1.25 t	14.83 t
› of which diesel + gasoline	131,000.00 t	1.25 t	6.78 t

Development of CO₂ emissions from 1960 to 2022 in million tons
See also: CO₂ equivalents by country

Production capacities per energy source

The given production capacities for electric energy for the year 2022 have a theoretical value, which can only be obtained under ideal conditions. They are measuring the generatable amount of energy, that would be reached under permanent and full use of all capacities of all power plants.

In practice this isn't possible, because e.g. solar collectors are less efficient under clouds. Also wind- and water-power plants are not always operating under full load. All these values are only useful in relation to other energy sources or countries.

Energy source	total in Tonga/year	Percentage in Tonga	Percentage USA	per capita in Tonga	per capita USA
Fossil fuels	65.14 m kWh	86.7 %	16.7 %	622.80 kWh	2,133.66 kWh
Solar energy	6.99 m kWh	9.3 %	1.3 %	66.81 kWh	172.13 kWh
Wind power	3.01 m kWh	4.0 %	2.8 %	28.73 kWh	362.18 kWh

Usage of renewable energies

Renewable energy includes wind, solar, biomass and geothermal energy sources. This means all energy sources that renew themselves within a short time or are permanently available. Energy from hydropower is only partly a renewable energy. This is certainly the case with river or tidal power plants. Otherwise, numerous dams or reservoirs also produce mixed forms, e.g. by pumping water into their reservoirs at night and recovering energy from them during the day when there is an increased demand for electricity. Since it is not possible to clearly determine the amount of generated energy, all energy from hydropower is displayed separately.

In 2021, renewable energy accounted for around 1.8 percent of actual total consumption in Tonga. The following chart shows the percentage share from 1990 to 2021:

Renewable energy Tonga