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.


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