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by soundsop
3688 days ago
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Electricity derived from solar panels and stored in batteries is neither free from cost nor free from carbon emissions. The monetary cost and emission of carbon coincides with the manufacture of the solar panels and batteries rather than the generation and storage of the energy unlike many other technologies. The costs and emissions of solar-derived electricity may be lower than alternatives but they are most certainly not free. |
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This is somewhat justifiable for the panels since they have a 25+ year life.
Less so for the batteries, which have maybe an 8 year life with good care. We try to burn power as much as possible (e.g. running the water pump) when the sun's up, so it doesn't have to pass through the batteries.