Awesome info on the DC compressors, wish they made one in the 3,000-7,000 btu range. A VFD could be used if it is in fact 3 phase.
UPDATE ON THE WATER HEATER 194 kwh used in 2135 hours
Math on that is
89 days
2.18kwh a day x .11 cents per kwh = 24 cents a day x 31 days = $7.44 a month.
Soon I will be using only one tank and will decrease the temp to around 110 F - 112F
BTW I lost ALL of my bore hole temp data in a DON'T USE RECHARGEABLE BATTERIES IN YOUR DATA LOGGER incident.
I have only seen it go as low as 33.4F and that was when it ran ALL day trying to supply 7 people with hot water at 122F.