Comment Comment by yazr What do we mean by "high efficiency" PV panels in the context of commercial roof tops ?AFAIK thin film are around 10%, standard PVs around 20% and the multi junction are 30% but cost x10 for special uses only.. parent yazr 8 years ago
AFAIK thin film are around 10%, standard PVs around 20% and the multi junction are 30% but cost x10 for special uses only..