Solar cells in series sum voltage and current? Answered
I am very confused!
I built a 10-cell panel (laid out on corrugated plastic for testing). They were rated at 1.8W and .5V. In the sun, putting the volt meter on a SINGLE cell yields about .55 V and 136mA. This is the same for every one I tested, on the panel and individual cells.
What the heck? Shouldn't they be about 3.6A?
So I soldered 10 in series and put the leads across the final terminals- sure enough I get about 5.5 volts! But I also get about .96A. And current is negative.
WHAT THE HECK?!
Am I understanding it wrong? I have to be. I thought putting cells in series adds voltage but current is going to be the same as whichever cell is producing the least. Somehow I'm going from .55V/ea to 5.5V/panel. and 136A/ea to .96A/panel.
10 cells. Should have had an 18W panel. Each cell should be giving me 3.6A. "This should be fairly simple" I thought.