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Size of Generator needed

staker

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timmins
What size of genset would I need to run a 12 foot shelter with 18,000 BTU/HR air conditioner and lights and all. Thanks
 

155mm

Chief and Indian
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Is it a military shelter prewired? If yes, what is thesize of the main breaker?
 

staker

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timmins
Yes prewired has a small panel but no main breaker. 100 amp panel I think. It was made as a Dental LaboratoryIMG_2134.jpg
 
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98G

Former SSG
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Ok thanks alot.
How much stuff do you plan on running at once?

10kW is generally plenty/overkill for a largish house. For 18,000BTU AC and some lights I doubt very seriously you'll need that much.

Count up the amps of the largest combination of things you plan to ever have on all at the same time....

Edit to add example -

An 18,000BTU AC may draw from 12-20 amps of 120v single phase AC current, depending on efficiency. Assume 20 amps just for purposes of discussion. That's 2.4kW. Running ten 100Watt incandescent bulbs adds another kW (3.4kW total). With all this on and running, want to run a power tool? Say an angle grinder? Maybe another 11 amps (1.3kW) for 4.7kW total.

I'm betting the lights are not incandescent. If they're LED this will take off almost all your lighting load. (If they're incandescent change them to LED and save thousands on genset cost)

Even without load management a 5kW MEP802 covers everything easily....
 
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Daybreak

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Howdy,

Since it was military, look at what the wire plug looks like. That should have a sticker nearby, or the type of plug, and how many wires are there.
 

staker

New member
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timmins
The only cable outside is a 2 prong plug. i'm thinking for 12 volt. but on my S250 I have a generator and 12 volt hookup panel 230 volt box mounted on the outside.IMG_2144.jpgIMG_2147.jpgIMG_2148 (1).jpg
 

Daybreak

2 Star Admiral
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Howdy,

If it is military, then it will have a plug somewhere. That is how the shelter is powered. The plug will lead you to what you will need.

Example below. Military 3 phase power plug.
3 phase plug.jpg
 

staker

New member
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Location
timmins
I believe it was never used NOS becuase paint is still like new on the inside and the items in it are new looking, it is Canadian military. I plan on a 2 burner electric stove top the new kind and already has a stove top vent fan installed. And have not looked at the lighting yet but will probably change to led. And it has the diesel heater also.
 
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Coug

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It all depends on what you want to do.
As others have said, the aircon will take a bit, mostly for the startup surge. I have a 3 ton ECU (so 36000 BTU I believe) that I easily run on a 5KW MEP802A. It sits at about half load, or a little less in aircon mode. In heat mode it's 10KW so my 5kw won't pull it.
Then it's all about whatever else you plan to run. A few LED bulbs will be negligible, incandescents will be significantly more.

You could probably toss in a couple batteries, a solar panel or two on the roof, and then use DC lighting, add an RV fan for ventilation, and not even worry about the generator.
 

staker

New member
11
3
3
Location
timmins
It has a vent fan like for a stove in it. And I have four 1.something amp hour batteries and 2 250 watt solar panels and that is the plan to put the panels on the roof.
 
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