I did a simulated flat mount series test today with the 3 250w panels. I figure it's best not to get addicted to the power of tracking before it's too late. The house shaded most of one of the panels and the affect on the array was bad. The voltage took a dump and the amps were squat. I don't care what the wire cost for parallel, the two exposed panels should have been good for over 30a. That debate is over.
Once the sun did clear the house I used the 600w setting on a heater as a load. The controller was in absorb at 14.4v and I saw 23a before the controller switched over to MPPT at 13.8v. Like running the AC on two panels, the system was almost keeping up with the heater. The system peaked at 45a and 626w in the 30 minute test.
Output in bright light would be fine with series and thinner wire. The impact of full or even partial shading of even one panel is too much to even consider.
