I agree with everything Bruxiot has written although I would like to add that I run a 24v system with 4x 12v 250amp batteries, so effectively 24v 500amp/hr battery bank.
|I have 540 watts at 12v solar panels wired to give 270watts at 24v. This is enough to keep the battery bank at over 25volts all the time, and I have an A+ large fridge / freezer which only uses 100watts or 0.3 amps with a soft start.
I also have a 500watt 24v wind turbine, which is awaiting a new controller/charger, so isnt connected up yet.
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Steve