Differences

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--- electrical:solar:panels [2023/07/12 11:17]
frater_secessus [Solar panels]
+++ electrical:solar:panels [2023/09/05 21:44]
frater_secessus [efficiency]
@@ Line 141: / Line 141: @@
-===== Efficiency =====
+===== efficiency =====
+The forumula for panel efficiency is simply rated watts / square meter.  A 20% panel will make 200w per square meter under lab conditions (ie, 20% of the lab's 1000w standard).
 Higher efficiency doesn't mean the panel makes more power;  it means it makes more power from a given area.  100w is 100w, but you might be able to fit a 110w panel high-efficiency panel in the same space as a regular-efficiency panel.
@@ Line 150: / Line 153: @@
-> At zenith, sunlight provides an irradiance of just over 1 kilowatt per square meter at sea level. Of this energy, 527 watts is infrared radiation, **445 watts is visible light**, and 32 watts is ultraviolet radiation. -- [[https://en.wikipedia.org/wiki/Infrared|wikipedia]]
-Mono panels can capture about 15-20% of this visible light energy.  Poly panels capture 13-16%, and film panels capture 9%.
+===== longevity =====
+Framed panels are often warranted to make 80% of their rated output for 25+ years.
+There is [[https://web.archive.org/web/20220703094223/https://www.sciencedirect.com/science/article/pii/S2211379716301280|some evidence]] that panels with a load connected degrade slower than those stored unconnected (open circuit)
 ===== Specifications =====

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