Hi KJ.
Yes, if I start over I have enough room for 1250 watts on the roof.
The Morning Star string sizing tool, if I remember correctly, says that, with a 12 volt bank, the Tristar MPPT 60 can do 1250 in series, and 1000 in parallel.
Since I rarely (one deployment in 4 years) use the awning I'm considering panels on the passenger's side, while getting rid of the awning. That would allow me to leave the system that has served me so well, but which is too small for full time, in place.
Hi SMK,
Unfortunately I've purchased the Magnum 3012 hybrid inverter so I'm committed to a 12 volt bank.