OP here.
The Morningstar MPPT controller would be a second choice if I cannot get useful output from 12-volt panels, but I would like to pair up the Trimetric SC2030 with my Trimetric 2030 monitor, and panels wired in parallel, if practical to do so.
I have 100 watts of solar on the roof now, a 25 watt panel and a 75 watt panel, both OEM on a 1997 coach. IMO, it is not well designed, as the cable runs seem far too long. The panels are just behind the center of the 35’ coach, the controller (PWM) is in the very front, and the battery bank is almost at the rear. All connected with AWG 10.
In spite of this, I get measurable output to the batteries even on very overcast days. I think the current panels are monocrystaline, although I need to take another look at them to confirm.
I’m trying to guesstimate what I can do with the most efficient reasonably affordable panels for less than ideal conditions.
Wayne
