Re: Small cooking appliances off an inverter?
It isn't the inverter that will strain: an inverter capable of 'X' Watts is capable of 'X' Watts.
The batteries, on the other hand ...
The (nearly) constant draw of the resistance heating element may add up to a greater number of Watt hours than the larger draw of the microwave over a shorter time. What's really important is when you use it. If the batteries are at "Float" stage and the panels are "idle" you can use lots of power and still have your over-night reserve (providing the system is designed properly). This is when I run the water pump, digester, and yes microwave.
When we talk about electric heating being not very efficient, we mean in relation to an alternate energy source such as propane.
Some microwaves don't like MSW. It messes up their control mechanisms. I guess they don't put very good power supplies in them. Also, the magnatron will use greater power and function less efficiently on MSW. Been there, done that, bought the True Sine Wave!
1220 Watts of PV, OB MX60, 232 Amp hrs, OB 3524, Honda eu2000.
Ohm's Law: Amps = Volts / Ohms
Power Formula: Watts = Volts * Amps