Microwave not working.

A 1200 watt microwave does not use 1200. It cooks at 1200. It can take more then 2000 to make it work. You have to read the specs. That 1200 is just the cooking wattage

 

Lol....I don't think so unless your arc welding with it also

 

I have a clamp-on Fluke meter... it pretty much agrees with the internal shunt in the inverter. 110 running amps x 13.5 voltage equals 1485 running watts. It takes about 140 amps to start.

 

BTW... I am talking about the DC side, not AC. 1485 watts divided by the 135 volt output equals 11 amps AC. (yes the voltage is too high and yes... it is a true RMS meter)

 

The inverter is too small to run the microwave.
you need a higher wattage inverter.
Look for something in the 3000 watt range.

Some microwave units will not work on a modified sine wave.

I have used units from this place. they seem to be a good source. theinverterstore

 

Like I said above. 1200 watts is the cooking value not what is required to run the microwave!!!!

 

And I just looked... mine in the pic is a 900 watt according to the label in the door. So, we know it uses 1485 while running... that's 585 watts over and above the cooking watts.

 

Wow midnight, it is the inverter. There is an overhead with microwaves as already mentioned, so if you want to use the right one, get one at least 2.5 times the microwave consumption.

 

He probably can't change the inverter--it's a company truck.

I have that same inverter and it works with that microwave pictured, which Walmart still sells. I'd spend $59 on a microwave before dropping money on a new inverter.