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Old 12-29-2014, 04:17 PM   #1
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Microwave doesn't work on inverter

On our 2014 DS 4018 we are unable to use our microwave oven or even get the lights or fan on it working while we are on battery/inverter power. Can anyone offer suggestions on what to alter in our approach, or what to do trouble shoot this? The microwave works fine when we are on shore power.

The fridge, lighting, and TV's all work whether we are on inverter or shore power.
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Old 12-29-2014, 04:27 PM   #2
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Originally Posted by TinMan Trvlr View Post
On our 2014 DS 4018 we are unable to use our microwave oven or even get the lights or fan on it working while we are on battery/inverter power. Can anyone offer suggestions on what to alter in our approach, or what to do trouble shoot this? The microwave works fine when we are on shore power.

The fridge, lighting, and TV's all work whether we are on inverter or shore power.
TinMan Trvlr
In many, (most?), RVs the microwave can not be run on battery/inverter power....only with shore or generator power.
Mel
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Old 12-29-2014, 04:47 PM   #3
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Because a microwave uses more power then many inverters can supply. Unless you have lots of batteries, they will run down fast.
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Old 12-29-2014, 04:49 PM   #4
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TinMan Trvlr
In many, (most?), RVs the microwave can not be run on battery/inverter power....only with shore or generator power.
Mel
'96 Safari
Yep... X2 Not all electrical outlets are wired to be fed by the inverter.

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Old 12-29-2014, 04:55 PM   #5
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You might have something else going on there. My microwave lights up and flashes when inverter is on but never tried to use. Would draw to much juice but the front lights should come on
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Old 12-29-2014, 05:37 PM   #6
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Hi TinMan Trvlr,
It could depend on the options that were in the coach from the factory. The standard DSDP has:
1. 4 coach batteries
2. 2000 WATT inverter (16.6 AMPS at peak power)

All electric coach has:
1. 8 coach batteries
2. 2800 WATT inverter (23.3 AMPS at peak power)

There are also several independent option choices that can cloud this issue. Like others have posted, the standard layout, most likely, does not power the micro wave. The all electric option, most likely, does power the micro wave.

The lights and fan run through the same circuit as the oven. They will work when the oven is powered.

If the wife needs the micro, I just turn on the generator.
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Old 12-29-2014, 06:35 PM   #7
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Tell us the make, model, type (TSW/MSW) and capacity (watts) of your inverter.

Mine is a Xantrex Prosine 2.0, 2,000 watts true sine wave, Runs the microwave nicely provided I have enough battery power.
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Old 12-29-2014, 07:45 PM   #8
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I have 2300w inverter, powers the MW just fine. Use it on battery for quick heating at breakfast, etc.
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Old 12-30-2014, 07:07 AM   #9
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You might have something else going on there. My microwave lights up and flashes when inverter is on but never tried to use. Would draw to much juice but the front lights should come on
tomusaf
Like in your Safari, the receptacle for the the GE over-the-range microwave/convection oven in my Safari is inverter powered, (because we have inverters capable of operating a microwave).

If/when a coach builder uses an inverter that is not capable of operating a microwave it's NOT unusual for that receptacle to be powered only when the coach has shore or generator 120VAC power.

Most likely that's whats "going on" with the OPs microwave.

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Old 12-30-2014, 07:20 AM   #10
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08 Dutch Star w/magnum 2200 Ithink. Might be a 2500. The microwave will work on inverter but it makes a buzzing noise - like it really does not want to be doing this! So, I've decided just not to use it. Might be we have the older MSW type. Maybe the Full Sine Wave would not make the noise?
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Old 12-30-2014, 06:29 PM   #11
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MCJ, is your inverter TSW or MSW (If MSW try it on a TSW)

What is the difference.. Well MSW is a stepped waveform, There is a word, Stile, it has 3 meanings that I know of.

One is a character in a series of fiction novels, Citizen Blue, nickname Stile, because back when he was a slave, instead of a citizen he looked at a pile of horse dung (The second meaning of Stile) and diagnosed an illness in one of his master's horses, Thus saving the master much money, also the horse's life, and earning a higher ranking among the slaves.

The remaining meaning is the set of steps that a farmer may use to cross over a fence without needing to open the gate, He can climb up/down but the livestock can not (Pig farmers use this I know, grew up on a half and half farm, I usually give my dad's half (Dairy) credit cause that means I've shoveled tons of Political Promises, but Grandpa was a swinheard).

And that is also the waveform of a MSW inverter, same as those steps.

A true sine wave inverter (Think Flute) is the sweetest sounding waveform there is, it is also the ideal wave form for shore power,, Shore power is rarley as clean as a TSW inverter (though it can be). so anything that works on shore power, and does NOT overload the inverter, should work on the inverter just fine.
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Old 12-30-2014, 06:52 PM   #12
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I will second Gary's post. Many coaches are wired differently so it depends on how yours is wired.

My microwave works off of the inverter BUT I will not use it on inverter power now will I use ANY device that draws a significant amount of amps. I fire up the generator when those devices are needed.

There have been numerous people who have had to replace their microwaves and I will speculate that it could have been from using in on inverter power.

Mine is 13 years old and gets used multiple times everyday and it still works fine.

Dr4Film ----- Richard
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Old 12-30-2014, 08:37 PM   #13
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Quote:
Originally Posted by mel s View Post
TinMan Trvlr
In many, (most?), RVs the microwave can not be run on battery/inverter power....only with shore or generator power.
Mel
'96 Safari
Even our "old" 2002 DSDP 2000 watt MSW inverter will run our Advantium microwave/convection oven. The Advantium really doesn't like the MSW wave form but it still runs and works but it does take longer.
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Old 12-31-2014, 07:16 AM   #14
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Check the Inverter breaker box and make sure the breaker in on for the Micro Wave. If it appears on then reset it.

My MW works fine on the Inverter.
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