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Old 02-08-2021, 06:20 PM
CoachKandSportsguy CoachKandSportsguy is offline
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Default For those interested in Solar Panels Sales Pitches
See what the Sales rep says when you ask them about solar panels annual efficiency decay. .

https://www.nrel.gov/docs/fy12osti/51664.pdf

article on estimated annual efficiency decay

investment guy