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Subject Topic: low voltage micro wave Post Reply Post New Topic
Personneverenoughtime
05/1/2017 at 7:04pm
 Location: uxbridge middlesex
 Outfit: swift kontiki motorhome View neverenoughtime's Profile View Profile   Reply to neverenoughtime Reply   Quote neverenoughtime Quote  
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What wattage would be deemed a low voltage micro wave.Thanks for any help.


PersonCapt Lightning
05/1/2017 at 8:08pm
 Location: Turriff Aberdeenshi
 Outfit: Romahome R30 Dimens View Capt Lightning's Profile View Profile   Reply to Capt Lightning Reply   Quote Capt Lightning Quote  
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Don't confuse voltage and wattage of an appliance. There will probably be a range of wattages. What you need to worry about is the current that it will draw.

Please don't even think of using a microwave from a liesure battery or through an inverter. You will knacker the battery very quickly. Additionally a low voltage microwave would need heavy duty wiring, switches etc..

A 500 Watt unit after allowing for inefficiencies will probably draw 70-80 Amps.



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Personneverenoughtime
05/1/2017 at 9:34pm
 Location: uxbridge middlesex
 Outfit: swift kontiki motorhome View neverenoughtime's Profile View Profile   Reply to neverenoughtime Reply   Quote neverenoughtime Quote  
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Thanks Capt I was confused.Going in for a 700 watt but have been advised not to use any other equipment so not to trip the ehu.


PersonCapt Lightning
06/1/2017 at 9:23am
 Location: Turriff Aberdeenshi
 Outfit: Romahome R30 Dimens View Capt Lightning's Profile View Profile   Reply to Capt Lightning Reply   Quote Capt Lightning Quote  
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Low voltage microwaves seem in many cases to be simply 'mains' units with a built in inverter, so generally they come in the same sort of wattage range - 500 to 750 ish.

These will only draw 3 - 4 amps from the EHU, so depending on the site supply, there should be a couple of amps spare. I've never used a microwave in a van - I don't believe in carrying round anything more than I need, but I'd check up if any 'switch-on surge' would trip the EHU. I've seen some units described as 'soft start' which should eliminate this.

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PersonNightrider
07/1/2017 at 11:50am
 Location: Wirral
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We have a Daewoo Compact QT1 it's a 14ltr 600W Microwave.
Never had any problems on site EHU and when we are off grid it runs off a 1000W/2400W Peak Invertor supplied by 2x 110Ah leisure Battery's in parallel.


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PersonMonty15
04/2/2017 at 1:09am
 Location: London
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Just to add to your confusion! The 600W (or whatever rating it claims) is the Microwave OUTPUT power (the cooking power if you like), the input power (the actual power drawn from the supply) can be a third or more higher (600W output, 850W input!).
No hard and fast 'rules' as to the difference between input and output power, generally you have to find the rating plate on the actual appliance to find it's power consumption as it's rarely stated in any of the 'figures' on the box or adverts etc.
600/850W (around 4 Amp load)is not usually a problem with 240v EHU, but pushing the boundaries for powering from a modest leisure battery/inverter set up (around 80 Amp load on 12v battery), you could run the batteries stone dead very quickly (a good inverter should stop you actually damaging the batteries by over discharge).


Persondinx
06/2/2017 at 8:22pm
 Location: north east
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hi I also have the Daewoo compact qt microwave never had any problem using this with on site electrics. also use halogen oven as don't like the gas fitted oven don't use both at same time tho.



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