Should I install electric tankless hot water, a heat-pump water heater, or solar hot water?
So I’m in the process of specing out and finishing design on a Deep Energy Retrofit/Whole House Remodel on an old 1858 farmhouse.
We are in Zone 6a – NH.
PERSIST Technique is being used throughout.
R20 slab/R20 Sandwich Foundation walls/R40 above grade walls/R60 roof
We will have 9.3 kW of PV solar, and our current plans include two Solar Thermal Panels and and 80gallon Steibel-Eltron Water Heater/Storage Tank for our domestic hot water…..
That is until someone mentioned that I should consider a Heat Pump Water Heater. I’ve also considered Point of Source Tankless Electric Hot Water Heater by Steibel-Eltron (Tempra 20 & 24).
I like that my hot water would only be produced when needed.
We also go away a lot in the summer to visit family and I am concerned that the SHW will just be wasted.
With the large PV array won’t the Electric Tankless Steibel-Eltron Tempra 20 & 24 make sense?
The Tempra 24 is 100 amp, 240volts, and 24kW. The Tempra 20 is 80 amps, 240volts, and 24kW.
My utility is paying for my underground to my house whether it needs to be 200 amp or 400 amp service.
What should I do? Articulate, educated thoughts welcomed!!!!!!
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