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amortisation, energetic

The energetic amortization time (EAT) is the period of time taken for all energetic expenditures involved in the construction of an energy-producing facility to be compensated by the energy production. Traditional power stations can never amortize because they continuously burn fossil fuels. By contrast, systems that use renewables, such as solar or wind energy, have a finite EAT which may be as short as a few years in the case of an efficient domestic solar heating system.

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