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From Wikipedia: "A 2015 review in Renewable and Sustainable Energy Reviews assessed the energy payback time and EROI of a variety of PV module technologies. In
by matthewdgreen 3y ago
From Wikipedia: "A 2015 review in Renewable and Sustainable Energy Reviews assessed the energy payback time and EROI of a variety of PV module technologies. In this study, which uses an insolation of 1700 kWh/m2/yr and a system lifetime of 30 years, mean harmonized EROIs between 8.7 and 34.2 were found." https://en.wikipedia.org/wiki/Energy_return_on_investment https://en.wikipedia.org/wiki/Energy_return_on_investment
Seems like the lower numbers come from older, obsolete PV technologies. Lots of improvement since even 2015.
- zdragnar 3y agoI'm a little skeptical of these numbers. At the area of land we're talking about (and the location of the land), dust (or cleaning), abrasive sand, lightning and hail are all going to be an issue for the panel lifetimes, if not their efficiency. They're mostly not in areas with tornadoes, which is nice, but I think 30 years is pretty optimistic.