This post came at a very opportune time for me, I had the exact same question as the OP. Now I would like to know if the standby current (no load) is additive to the consumed current of a running appliance, I.e. a microwave?
Also that standby current could be prohibitive if the inverter is left on 24/7 for a camping weekend to power a small residential freezer or fridge!
I presently have a sunforce 1000 watt psw that has a no load draw of just slightly more than 2 amps measured with a trimetric. 2 - 6 volt Costco GC batteries. 300 watts roof mount solar plus 100 watts portable. Victron mppt 100/30 controller.
Now shopping for that next inverter.