Forum Discussion

horton333's avatar
horton333
Explorer
Aug 26, 2013

Air Conditioners and Generators

So I just got my first generator: $175 for an old 2kw no-name (PowerTek) inverter on Kijiji.
I have seen many posts about what capacity of generator is required to run an air conditioner, all saying it cannot be done with a 2 kw unit. This makes total sense, the surge is way beyond the surge rating (on mine it is only 2.2kw surge) and an inverter based generator should be very sensitive to an overload.
Being inquisitive I decided to try to see if the A/C would work on the low setting, mine has three. It did. Turns out it works even on the highest setting (13,500 BTU unit). I even left it running long enough to cycle on/off a couple of time to see if I was just 'lucky' on the first surge. Kept lasting cool air like I was on 'shore power'.
The trip circuit on the generator does work, in the early part of charging my three batteries (with two chargers) trying the A/C will trip the overload. This should not work, but so far it seem to?!
I am not planning on using this, on anything past idle this cheap generator is LOUD, I just find this result 'most puzzling' and was wondering if others had any comments?
  • I think you misread -- all the threads I've seen have said that a 2,000 watt generator is marginal, i.e., 2000 watts is right at the surge rating for a 13,500 btu AC, so maybe it would work, maybe not. A 2200 watt surge generator ought to work, but the kicker would be if your house battery was discharged and the converter trying to charge it up, there's no way a 2,000 surge genny would work, and a 2200 watt probably would not, because the battery charging function would take around 600 watts off the top.

    I am not a bit surprised your 2200 watt genny can do it. That extra 200 watts makes a difference when you are near "the line."

About Technical Issues

Having RV issues? Connect with others who have been in your shoes.24,193 PostsLatest Activity: Jan 27, 2025