Quite a lot of people is concerned because photovoltaics and other regenerative technologies need some time to earn back the energy which was necessary to build the facility.
But if you see it from a private investor you see that this is nearly irrelevant.
If we analyse the typical spendings like new car, holiday trip or pool instead of solar panels we see that those investments all consume energy. having invested in solar panels I'm saving the fuel which would have been burned during the flight and I'm using the energy free of CO2 after the energetic y back period. So make energy saving your hobby, you might also find methods with very short energetic pay back time and enjoy solar powered activities instead of solar burned bodies...
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