[RE-wrenches] Fortress Battery Heater

[Jerry Shafer]

Pet heater have worked for me, I air gap a sealed heater box under the
battery, thermostat inside the top of the battery.  It's slow and low power
but does the trick
Fun times

On Wed, Feb 8, 2023, 3:05 PM Ray Walters via RE-wrenches <
re-wrenches at lists.re-wrenches.org> wrote:

> Hi All;
>
> I have a fresh Fortress Evault installation with a Solark inverter.  The
> batteries are indoors in the center of the house, but the customer is
> not there full time, so the battery is unfortunately going below
> freezing.  What are the best options for setting up a heating system for
> the E Vault?
>
> Here are ideas that I have not tried, but am considering:
> 1) add a 240 v, 1000 w baseboard heater in the room near the battery
> that is wired to only run off the generator.  Run the generator until
> the heat comes up, and then hopefully after 30 minutes, the battery
> would begin accepting a charge.
>
> 2) Add an 120 vac heating blanket under the evault that would be wired
> to a thermostat, but also have a relay control from the PV system, so
> that the heater would only operate when the sun was out, and the battery
> was below 50F.   I don't quite know how to set this up with the Solark's
> load controls.
>
> I've considered some DC options, but they don't make much sense, since
> the inverter has to be on to charge from PV anyway.
>
> The long term plan is for the client to finish the insulation, and sheet
> rock, and add a gas wall heater in there as needed.
>
> Thanks,
>
> Ray Walters
> Remote Solar
> in the Colorado mountain cold.....
>
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