Originally Posted by garbonz
What's more important is how much you are going use in a typical day and how many days of low or no light you are designing for.
580 watts at 14 volts is 40 ish amps which is maybe around 200 AH a day in decent sun. That's quite a lot of capacity unless you are running a BIG inverter.
How many Amp Hours a day do you need.?
I don't need 200 AH per day. I'm going for overkill. But, there is always a but isn't there. I'm trying to design the solar infrastructure to be portable. In other words I'm wanting to be able to easily detach my solar panels and charger for use on a small cabin. If I so desire. Plus I want to be able to charge as quickly as possible when there is intermittent sunlight and maybe squeeze a little more out of a cloudy day. Overkill is better than underkill IMHO as long as everything plays nice together.
What I'd imagine I'll do when camping is spend to much time on my computers and watch a movie or two during the night on my 32" flat screen and blueray player. Additional wattage will be pulled by computer speakers (w\subwoofer) while watching a movie because sound quality is important. I have a xantrex 1000w pure sine wave inverter for this which I think will be just fine.
I don't plan on any heavy draws like microwave, vacuum, coffee maker, etc. But I'm hoping to purchase a Honda or Yamaha generator in the future for running the air conditioner if I'm too uncomfortable.