power invertor and a coffee pot.

[jss06]

800 Watt inverter will be more than enough. Just make sure your battery can provide enough current to run it.

At 430 watts you are pulling 4 amps AC. That is 40 amps DC before you even account for converter inefficencies. It will be closer to 45 or 50 AMPS draw. that will quickly drain a normal battery. Make sure you have some way to recharge it.