Compared assessment of selected environmental indicators of photovoltaic electricity in OECD cities (PDF)
Interesting facts about photovoltaics. via @doctorkarl
– The energy pay-back time (EPBT) of a complete PV systemÂ (not only panels, but also wires and electronic connexion devices)Â is, depending on the solar irradiation of its location, in the range Â Â of 19 months (just over one year and a half) to 40 monthsÂ (three years and 4 months) for a roof-mounted system, and fromÂ 32 months (2 years and 8 months) to 56 months (4 yearsÂ and 8 months) for a PV-faÃ§ade.Â
– Based on a commonly admitted 30 year-long commercialÂ life cycle, the energy return factor (ERF) is between 8 and 18Â for roof-mounted systems, and between 5.4 and 10 for faÃ§ades.
– Varying widely from one country to another, using the energy Â Â production mix from each country, 1 single kW of PV Â Â panels (roughly 10 square meters) can avoid up to 40 tonsÂ of Carbon dioxide (CO2) during its whole commercial lifeÂ cycle – 23.5 for a faÃ§ade.Â
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