Low angle solar performance
Has my one seen data on performance by specific panel or general PV type for different incidence angles of solar radiation? All I can find so far is generic info. Jim
Forum Discussion
BFL13 wrote:
Don't forget that low angle sun is when it is in atmospherics up to say 15 degrees altitude, so even if your panel is great at low angle stuff, it doesn't matter because the light is going through haze etc.
That is why they usually define the solar day as from mid-morning to mid afternoon.
Looks like it is not the haze BFL. It's the losses from having glass in front of the photovoltaic cells. The first and last 20 degrees of daylight are drastically attenuated on flat panels by having a sheet of glass in front of the solar cells. Even just 5 degrees above sunset there are still 270 watts per square meter to catch compared to a nominal of 1000.
Jim
