It doesn't run my 800w microwave

Running my 400 w heater easy,but 800w microwave just spins and doesn't heat. No overload lights

Answered! View the answer I have this problem too

Is this a good question?

Score 0


Hi and thank you! Yes,rigs usually use 4 batteries and that's what I have. 4×950 cranking amps.And all 12 volts parallel and generator is 12, but i get like 13.8 looking at the battery gage.Unfortunately I don't have the tools to mesure the output, but this is what happened. I brought my house counter microwave which is GE 1000W and this thing runs like at home. Surprise, no overloads,still get a steady green light on my inverter with no any noise what's so ever. Happy trucker . The one didn't work was made by whirlpool and that's 800 w . Home depot has them and I looked into customers reviews, this particular thing wan't work with inverters. If you have any questions don't hesitate. Happy Holidays to you and your family !


Add a comment

1 Answer

Chosen Solution


The information in this link explains the problems of running a microwave oven from an inverter.

It is mainly due to the applied DC voltage value and the fact that your inverter does not supply a pure sine wave AC output

Here is also a link from which the relevant specification for your inverter was taken

PV3000HF/ Output Waveform: Modified Sine Wave

Was this answer helpful?

Score 2


Hi, can you measure the DC voltage across the supply batteries with the rig running and also at the input to the inverter with the microwave turned on? I'm suggesting this to see if there is a voltage drop through the fuses and if there is how much. Also just to satisfy my curiosity, are you using your truck batteries? As I thought that trucks were 24V I'm interested in how you connected the inverter.

Also have you got a different microwave oven that you could try just to see if it is a compatibility issue. Plus check the power specifications on the back of your microwave to get a true indication of the power used by the microwave not the 'heating' power.


Hi, well ,thank you for your time! It is a powerful inverter and it runs on 4 batterys 950 amps each with my motor running a 900 rpm, just got this inverter for my big rig, I also followed all the instructions and used 2/0 welding cables. The only thing I'm confused is the fuses. I got ANL fuses and Im using a DB fuse holder. Do you think that my cause the problem?


Add a comment

Add your answer

Andrei Radu will be eternally grateful.
View Statistics:

Past 24 Hours: 1

Past 7 Days: 3

Past 30 Days: 22

All Time: 254