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down_home's avatar
down_home
Explorer II
Aug 11, 2020

Drop in voltage with increase in heat

Right now at 9:30 pm it is 91 outside ad 75 inside and voltage meter is right at 115. It will go up to118-120 later....but in the heat of the day 110 or so the voltage goes down to 110 or so and we won't use the convection/microwave oven etc as it drops down to 105 or so.
That is on the generator or on 50 amp plug in.
Anyone have an idea what to investigate, a fix?
I'm not sure how long this has been the situation...but I don't remember encountering it in years past.
We did replace the front roof heat pump late last year with a little larger capacity pump.

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  • pianotuna's avatar
    pianotuna
    Nomad III
    Aug 11, 2020
    Hi down home,

    There is nothing to fix. It is perfectly normal for demand from the air conditioner to increase as temperature rises outside.

    Mine start off at 1200 watts. By mid afternoon, on a hot day that increases to 1900 watts.

    At the local campground, that causes the voltage to be lower than I'm comfortable with. I solve that with an autoformer.

    You could, in theory, add one. But 110 is quite adequate to run the roof air. I've always believed that is better to not fix something that is not broken.

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