Still Don't Get It (Solar)
What will charge 2 6v golf cart batteries better, a single 270 watt high voltage panel with mppt or two 135 watt 12v panels (parallel) with PWM and why???? Thanks. Gman
Forum Discussion
pianotuna wrote:
Hi jrnymn7,
Losses when the panel is at 50 C are about 12%. Raising the panels so that air can flow beneath them easily makes sense because it is a passive fix.
This is my 230w panel where it gets to 44C when ambient is 16C and to 51C when ambient is 25C. Hate to think what panel temp would be if flat on a roof like most installations
BTW photo taken in morning with panel facing Easterly. When twirled to Southerly I lower the tilt, then raise it again for Westerly mid-afternoon. My contraption has some tilt angle options for that reason. The wire across the top is to keep robins off. They poop down the panel.
I laugh at those guys who post they don't have to climb on their roofs once they install the solar. They must not have seagulls bombing them, or else they just don't know what is happening. You don't see any graphs of panel loss vs seagull activity in those insolation guides. Might be bad for the solar business. "Basil, don't mention the seagulls!"
