Typical last mile battery runtime (protecting against power cuts)
Mark Tinka
mark at tinka.africa
Sun Feb 5 09:18:35 UTC 2023
On 2/5/23 08:56, Roy wrote:
>
> I don't know how much the pumps require. The water well is about 100
> feet from the house and the pressure tank.
>
> The septic pump has to pump uphill to the drainage field. Distance is
> about 250 feet and elevation gain of 100 feet or so.
>
> The heat pump doesn't seem to be a problem but the aux heat is on two
> 20amp 220v circuits. There is a switch on the fan enclosure to
> disable the aux heat.
>
> Another biggie is the electric hot water heater.
>
> On 1/30 it never broke 32 degrees and the house used 145KWHR (average
> was 6KWH). Thank goodness I am not far from the Columbia River and
> the BPA has a major substation about 5 miles away so I pay less than
> 10 cents per KWH
>
> Over 2022, I lost power about 8 times. The longest outage was 15 hours.
I would suggest having your generator checked by a professional, because
it sounds like even if it's rated at 20kW, it is under-performing.
It sounds like it may have lost some of its spark, over the years.
Mark.
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