Thanks Pete,
I'm hoping for a mild winter but expecting one not so mild. The extra panels should help.
I think you'll be pleased with the improvement in transformer cooling with it raised up. Hope your 8010 inverters work out well for you. Hearing about Lighthunter's success with his is making me think about trying another one myself.
Btw, did you put 2 turns around a ferrite core on each of the 2 low voltage leads of the transformer? Powerjack puts 1 turn and usually only on 1 of the leads instead of both. The difference might improve your transformer's running temp under light loads, as well as the idle current. Maybe yours is already setup like that, or if not, might be worth trying.