MACHZER wrote:
I was thinking going to 3000 watts but the cable requirements must be outstanding and a quick battery killer for sure!
This statement shows you don't understand how the inverter and battery bank work. You should check out "12 volt side of life" and Handibob's blog for info about using 12v power.
Someone above posted info about the loads used by a toaster and coffee maker. Most small microwaves are 900 watts (higher than the toaster reference). Hopefully you've got a pair of batteries to provide the juice.