Math formula for calculation of solar power?

[russ]

No idea Cris - I would like to have a better idea as well.

If you use insolation for a location and stated panel efficiency the numbers come way off from what people seem to get.

[crisliu]

Thanks Russ.
I am curious what is the algorithm behind the solar power calculator on the web.Does any one have a clue?

[russ]

The losses are substantially higher for off grid due to the use of batteries.

The panel output is identical.

[fafau]

Wondering calculation for both off-grid and grid-tie? Are they same or not??

[russ]

All that you mention plus cell temperature, actual insolation, panel orientation (in regards to due south), haze, clouds and the characteristics of a particular panel manufacturers models.

I have seen no detailed calculation - only the results.

[crisliu]

Does anyone know if there are some mathematical formula for calculation of solar power? Or at least what parameters the electric energy depends on if produced by solar panel, like angle, days of sunny day, sunshine hour,latitude and longtitude,etc.?