by Warpspeed » Thu Sep 14, 2017 10:34 pm
That is a geometrical problem that you can solve yourself with a scale drawing.
Imagine you are the sun looking down on a solar panel. How many square metres can you actually see ?
If looking straight down on a panel from directly in front, you will "see" the whole actual area.
Completely edge on, you will see nothing, just a thin non working edge.
Viewed at some angle, the panel surface might appear to you as a thinned down rectangle narrower in one dimension than it actually is. If you make a scale drawing its possible to make a reasonable estimate of how much the power drops off, think of it as a decreasing aperture as the sun angle becomes less effective.
I am sure this is not completely accurate, but its probably close enough.
If you work this out for two panels propped up to form an equilateral triangle with three sixty degree angles, you will find the area the sun "sees" hardly changes at all throughout the day, and you can get an almost flat power curve equal to the full rated power of one panel, or half the total combined rated panel capacity. That is probably the optimum mounting angle for a virtual tracker if you can do it that way.
A typical roof might be more like forty to forty five degrees, so there will be a mid day power hump, and power will fall off at both sunrise and sunset. Not optimum, but still pretty useful.