I live off the grid in northern Canada (Yellowknife). I live off of eight 190 watt (24 volts each) solar panels for most of the summer.
If you were to purchase four 6 volt "golf cart" batteries and a couple of solar panels you could have more power than you will ever use (other than running the AC all day!)
The guys at Sun Electric are great to talk to and very helpful.
Lowest Prices in Solar Panels, Systems & Inverters
You will notice that it is actually cheaper to purchase a 190 - 200 watt panel than the smaller 50 watt panels (especially when you consider $/watt)