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Old 02-06-2019, 11:30 AM   #1
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Running Microwave with 3000 watt Inverter

Hi - I'm planning to install a 3000 watt Victron inverter/charger and the biggest item I want to run off of it is my 1200 watt microwave/convection oven. Will that be a problem?

Thanks for your help.


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Old 02-06-2019, 11:31 AM   #2
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How many and what type of batteries do you have ?

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Old 02-06-2019, 11:35 AM   #3
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I do it all the time, but as mentioned, if you do not have the battery capacity, voltage could fall enough to trip off inverter.
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Old 02-06-2019, 01:02 PM   #4
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You can run a 1200 watt microwave on a 1200 or 1500 watt inverter, if thats all that your running at that time. Run 2 of them on a 3000 watt inverter.

Watts are watts, whether at 120 or 12 volts.

1200 watts is 100 amps at 12 volts. If you have one 100 AH, 12 volt battery, it will be dead in about 45 minutes, but the inverter would have shut down before that.
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Old 02-06-2019, 01:58 PM   #5
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I plan to have 3 or 4 100ah lithium batteries. Thanks for the info.....it's very helpful. I was concerned that it wouldn't work at all.

Still not sure how many panels will fit on my roof. I hope to measure it soon.

I plan to just go 12 volts with solar and batteries. Is there any good reason to wire to 24 volts?
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Old 02-06-2019, 02:12 PM   #6
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Running a 24 volt system is more effecent as far as voltage drop and cable size. Twice the volts = 1/2 the amps.

The problem is, you still need 12 volts for the rest of the RV systems.

With solar, using a MPPT controller allows you to use higher voltage solar panels and still charge 12 volt batteries.

You get a little better low light charging and again, higher voltage means less voltage drop and a savings on wiring costs.
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Old 02-06-2019, 02:21 PM   #7
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I run my microwave off my 3000w Magnum and two Lifeline AGM golf cart batteries all the time. Also run my coffee maker, sometimes at the same time.

I can run my air conditioner for about 30 minutes too before I hit 50% SOC, but that requires a Micro-Air Easystart.
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Old 02-06-2019, 02:33 PM   #8
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I run a microwave off of a 2000 watt inverter. I have 800 ah of battery bank and 800 watts of solar. No issues so far. Over size your cables and keep them as short as you can to minimize voltage drop.
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Old 02-06-2019, 02:53 PM   #9
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Thanks to everyone. Great information.
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Old 02-06-2019, 03:33 PM   #10
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Im also under the impression some microwave ovens need pure sine wave inverter id recommend pure sine if u haven’t purchased already.
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Old 02-06-2019, 06:14 PM   #11
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I use a 2000 watt inverter and just plan on recharging the batteries at the time I may need to use the microwave.

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inverter, microwave

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