Water heater improvement (Timer)

[Xringer]

Originally Posted by MN Renovator

"Only uses 1.130 kW. Making 3856 BTUh of warmed up water.."

Umm 3.412 * 1.13 = 3.855.6
You've got the same efficiency as power hog mode, except with a long recovery time? ..or you've made a mistake somewhere along the line with the output or the input number.

I don't use the 4.5kW elements, I just tested them, using 120vac.
I only use the A7 ASHP to heat my hotwater. Which is super efficient. <1kWh per day .

I do use some resistive electrical heating in the old oil burner.. But it's all from PV.. (DC @ 800W max).

[MN Renovator]

Originally Posted by Xringer

I don't use the 4.5kW elements, I just tested them, using 120vac.

Ok, I saw your link with the Airtap title and put the two together. I see what you are saying now.