Dana,
I am no expert with ground source heat pumps, but I suspect that the
measurement you took was when the resistance heat strips were on, which will
only be used very infrequently in a properly designed and operated GSHP system.
Despite that, GSHP can be used off-grid with the heat strips off, but add a
couple more KWs to the array and insulate the heck out of the structure, plus I
suggest a LPG back-up.
GSHP's are not a slam-dunk install. It is very important to find
someone that will take a careful look at the particulars of a job (house,
climate zone, soil type, etc....) to be sure the final product is efficient in
its operation, esp for off-grid.
Bill
Feather River Solar Electric
----- Original Message -----
From: "Dana" <d...@solarwork.com>
To: "'RE-wrenches'" <re-wrenches@lists.re-wrenches.org>
Sent: Tuesday, May 26, 2015 7:53 AM
Subject: Re: [RE-wrenches] Water Heater Heat Pumps
> What kind of power draw do you see on this unit? & what kind of duty cycle do
> you see for 2 people or 4 people?
>
> I amp clamped a 1800 sqft house heat pump for DHW & house heat in full power
> and measured 4338 watts & have a rough time recommending heat pumps for off
> grid.
>
> ----------------------------------------------------------------------------
> Dana Orzel
> Great Solar Works, Inc - NABCEP # 051112-136
> E - d...@solarwork.com - Web - solarwork.com
> O - 970.626.5253 C - 208.721.7003
> "Responsible Technologies for Responsible People since 1988"
> Please consider the environment before printing this email.
>
>
> -----Original Message-----
> From: RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org] On
> Behalf Of Tom Lane
> Sent: Monday, May 25, 2015 3:59 PM
> To: re-wrenches@lists.re-wrenches.org
> Subject: [RE-wrenches] Water Heater Heat Pumps
>
> Water heater heat pumps make excellent sense in a garage in HOT HUMID
> SOUTHERN CLIMATES and about 700 square feet of garage space is necessary AND
> you must run a condensate line like an air conditioner . DO NOT PUT THEM IN
> CLOSETS AND OR SMALL LAUNDRY ROOMS UNLESS YOU CAN VENT 700 square feet of
> unconditioned air space to them . They are noisy , but a garage in a humid
> hot southern climate is a good choice and with a time clock set for 11:00 AM
> to 4: 00 PM when the air in the garage is hot AND solar grid tied system is
> operating is a great strategy . GatorTom
>
> Sent from my iPad
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