Small PWM controllers fed from large grid-tie panels??
Is there any way I can run two small PWM controllers off my big Sharp panels just for the starting batteries, or will they need their own separate small "12V" panel? I have a 24" x 36" space that a small panel could fit in, but it seems silly that I would need another panel when I already have 2kW of panels on tiltable mounts on the roof!
The only other way I can think of keeping the starting batteries charged when off the grid for maybe weeks at a time is to use my present small 10A Schumacher charger off an inverter, but that's not an elegant way of doing things.
Any ideas, anyone?
40' Crown bus with 2kW of tiltable panels on the roof:
Eight Sharp 255W, two Morningstar TS-MPPT-60, Magnum MS2000, Champion C46540 generator converted to propane, eight golfcart batteries, and maybe a small Exeltech inverter for the fridger.