Like others have said, unless you're running a MW, coffee maker or other high draw appliance, a 300W inverter and two GC's will be plenty. And I wouldn't even bother with more than a 200-250W panel either. IMO, if you want to pig out on power but not use the high draw stuff, get four 435Ah L16's instead of the 8 GC's. The L16's weigh less overall and take up less space. Yes, you'll lose some amp hours and they're taller than GC's but I have 4 of the 370Ah versions and have plenty of power. No solar either.