[RE-wrenches] [EXTERNAL] LFP Battery Box Heating

[White, Will]

Why not skip the external heating problem and buy batteries with built-in heating like the Discover AES or Helios? I got the heated AES rack mount; it was $50 more per module, which seems worth it. The Helios has the heater built in and I believe it has higher energy density.
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From: RE-wrenches <re-wrenches-bounces at lists.re-wrenches.org> on behalf of Amanda Potter via RE-wrenches <re-wrenches at lists.re-wrenches.org>
Sent: Tuesday, November 25, 2025 2:58 PM
To: RE-wrenches <re-wrenches at lists.re-wrenches.org>
Cc: Amanda Potter <adirondackbattery at gmail.com>
Subject: [EXTERNAL] [RE-wrenches] LFP Battery Box Heating

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Hello all,
I’ve been reading past posts regarding Battery Box Heating & am trying to find a simple way to heat an OSB insulated box for various LFP type batteries.

One Battery Company’s tech support said he uses (at his own home) a 110vac incandescent bulb plugged in to a thermostat (inexpensive) that lets him heat between 32 & 50 degrees F.

I had somebody suggest the same thing with some Christmas lights.
The box & inverter & C.C. are in an un- heated garage on the Canadian border of NY. ( It can, & does get pretty cold up here.)

Any suggestions?

It’s Off-Grid & the owners want their Starlink & Security Cameras to be on year round.

Thanks ahead of time!
And, Happy Turkey Day!

Amanda Potter
Energy Storage Systems
NABCEP PVIP
Adirondack Battery & Solar, LLC
(315) 212-2114
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