SunDanzer Question [RE-wrenches]

[Allan Sindelar]

Thank you, David.

And to follow up on my original query: I also spoke with Billy at SunDanzer
tech support, who recommended that while it would work, it was likely
unnecessary. The Sundanzer load and surge are miniscule, and with the
electronic start delay in the freezer, the likelihood of a simultaneous
surge from pump and freezer is very unlikely. He added that an LVD
disconnection in any case is self-resetting, and told me how to connect a
jumper in the controller to reduce the LVD voltage from 22.5 to 21.3.

So the problem is pretty much nonexistent.

Allan

----- Original Message ----- 
From: "David Palumbo, Independent Power & Light" <ipl at sover.net>
>
> Allan,
> I have used a similar circuit for water pumps and washing machines with
good
> results.
> - Dave
>
> -----Original Message-----
> From: Allan Sindelar [mailto:allan at positiveenergysolar.com]

> Wrenches:
> We have a longstanding customer with a 24V offgrid home system. He is
adding
> a Sundanzer 5.8 cubic foot 24V DC chest freezer to his home. We will
locate
> it in a cool north porch for minimal power consumption. The porch is
> directly above a pit containing his 24V Booster Pump and pressure tank,
and
> I'd like to use the same DC circuit, rather than running new conduit and
> wires.
>
> My plan is to use a 24V coil relay in the pump pit. Normally closed
contacts
> would send power to the freezer, since it has both lower draw and longer
> runtime. The pressure switch would activate the relay coil to disconnect
> power to the freezer when there is a call for water. It looks like the
> freezer draws about 1.6-3.2A, and the pump 8-10A. I don't remember the
> conductor size, but it was sufficient for the application when installed.
>
> Anyone tried this? Any problems with this approach? Is it overkill?
> Sundanzer specs indicate minimum 22.8 V for the 24V models, but I don't
know
> if this is a hard number.
>
> Thanks for any responses.
>
> Allan at PosE


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