At the storage lot an hour and a half before sunset in full low angle sun. One 68 W Unisolar is up on the roof and putting an amp into a battery at 12.7 v with an inverter on and a night light as the load, plus TT parasitics.
Looks close enough to begin testing.
The things we learn which are obvious in retrospect. The roof is slightly curved for drainage. No biggie if mounting a panel on brackets but something to consider for direct adhesive mounting of thin film units to EPDM. It of course means they will be not quite level.
Looks like the sun goes behind the trees at 4:05 or 4:10 where it hits the top of the RV. Still getting .18A in the shade, but production looks done for the day.
Jim
