You are overloading the generator. You can NOT put a big load on any generator when it is in idle or ECO mode.
Either plug in a 100 watt light bulb to ramp up the generator before you use the microwave or take it out of ECO mode.
You must never use the water heater or fridge in VAC with the generator; always use propane
Lou and Laura with Bella - German Short Hair Pointer
2008 GMC Sierra 2500HD Crewcab SB Allison Duramax
2010 Flagstaff 8526RLWS - Superglide 3300
HAM CALLSIGN - KC3FFW