just got back from 5 days in Death Valley. Mostly cloudy so when there was a little sun during my breaks I took advantage of it. Yesterday, about an hour before sunset, the sun broke through the clouds and I saw I was only getting 1.9 amps on my trimetric. I made like a stinkbug with my 200w on the roof, leaned a 100w flexible against my chair and pointed it toward the sun, and went to 7.9 amps. It wasn't long enough to make a difference, more of an experiment that shows that direction of the panels makes a huge difference.