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Old 04-24-2010, 01:53 AM   #11
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Re: Microwave Wattage


It wouldn't be fun if one didn't get to play with toys.
I'm gonna try out my stove-top Coleman oven tomorrow.


baglo
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Old 04-24-2010, 02:45 AM   #12
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Re: Microwave Wattage

We've the same situation as some others -- a Danby micro in the closet over the fridge in our 17A. It runs only on shore power.
Since volts X amperes = watts, I figure that a 1500 watt inverter would draw about 125 amperes from the battery. You'd need a cable 1/2" thick, much thicker than your normal battery cable (or the lead to the starter in your car) to pass that much current, and it would kill the battery almost instantly. I believe that powering a 120 volt household micro, even a small one, from an inverter is a non-starter. Sorry.
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Old 04-24-2010, 07:01 AM   #13
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Re: Microwave Wattage

Hi: tjryce...We have created a generation of "Instant Gratification" children!!! Anytime we took the children to visit, where there wasn't a micro. with a 60 sec. bottle warmer... it was bedlam Alf p.s. Don't they have 12V. bottle warmers that use a cig.lighter/power port in a car
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Old 04-24-2010, 11:13 AM   #14
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Re: Microwave Wattage

Quote:
Originally Posted by majaross
We've the same situation as some others -- a Danby micro in the closet over the fridge in our 17A. It runs only on shore power.
Since volts X amperes = watts, I figure that a 1500 watt inverter would draw about 125 amperes from the battery. You'd need a cable 1/2" thick, much thicker than your normal battery cable (or the lead to the starter in your car) to pass that much current, and it would kill the battery almost instantly. I believe that powering a 120 volt household micro, even a small one, from an inverter is a non-starter. Sorry.
I guess Reace would know about the wiring & possible use of the inverter.. He's pretty much the expert.. I would hate to see you fry your wiring..
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Old 04-24-2010, 11:56 AM   #15
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Re: Microwave Wattage

Thanks so much for the replies and info, everyone. Sounds like the first thing to do is nail down the 'starting' wattage of the microwave, to determine just what sort of beast I'm trying to deal with. The local library lends out Kill-a-Watt meters that will do this work for me; off to the library!

I'm not sure the power consumption calculation is as straightforward as majaross worked out. On the DonRowe site that gbaglo passed along, there's a basic calculator for inverter runtimes from batteries:
http://www.donrowe.com/inverters/inv....html#how_long

Another forum is grappling with a similar challenge, though these guys have much bigger RV's:
http://www.motorhomefacts.com/ftopic...190646ddab04ed

I'm also not concerned about frying the wiring in the Escape. I recently rewired a '76 Trillium from scratch, so am familiar with DC wiring. I'll not be tying the inverter into the 'regular' AC system; rather, I'll completely isolate the inverter behind the appropriate DC fuses (at the battery), and run dedicated AC wiring to new receptacles for inverter-based power.

At least, that's what I have in my head right now....

~T
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Old 05-02-2010, 11:56 PM   #16
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Re: Microwave Wattage

Hi Tim,

The microwave in your Escape was installed by Escape trailers, but supplied by the previous owner of your Escape. Have a look in the pile of documents I left in the kitchen drawer and you'll fund the owners manual of the microwave. I don't remember the Wattage, but I am sure it was listed under Technical Specifications or similar in the manual. I seem to think it was 700W. My experience with the inverters is that the listed Wattage of the inverter does need to be a lot higher than the rated wattage of the equipment. In other words: it is not inconceivable that you need a 1000W inverter to run a 700W appliance. A 1000W inverter will however probably draw in the order of 80 Amp which will a) not be available from the 12VDC outlets, b) will be a large drain on your battery and c) due to a) would have to be connected directly to the battery and d) you will have to unplug the micro wave from the built-in outlet or re-wire the micro wave outlet to the inverter.

Aside from the fact that this is not an entirely positive response, I feel I would do you a disservice if I would not provide a realistic response.

Gr8Escape
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