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Old 10-21-2021, 01:02 PM   #1
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232ESP - Winter Lithium Battery Use

Planning some winter snow camping with the 232ESP. Has anyone addressed using Lithium batteries in the winter. The good one have temperature sensors that stop the charging if too cold/hot.

Was thinking of moving the batteries inside and place them on the dining slide-out floor. Adding wires to connect to a common bus bar.

Thanks
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Old 10-21-2021, 05:53 PM   #2
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If you locate the Lithium batteries in the living (heated) space there will be no issues with cold weather. Even if the temp drops below freezing and you need to run the furnace, they will discharge down to ~-4 F. If the living space is above freezing, so will the battery be.

The "winter charging" issue is more for then the batteries are mounted in battery boxes on the tongue or in an area more directly exposed to outside temps.

Charging can take place as long as the BATTERY is above freezing.
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Old 10-22-2021, 06:50 AM   #3
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Welcome to the forum its a great place to get your questions answered. I don't know squat about lithium batteries but the first thing that came to mind was a charging battery in a living space, but I guess these are sealed and don't gas off. TM would know for sure.
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Old 10-22-2021, 10:52 AM   #4
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Leaning To A Heater

A little more investigating has revealed for folks with the same concerns. A better approach appears to use one of the holding tank heaters. There are a number with auto thermostats that have the pad going on/off based on the temperature. Installing with a on/off switch and you can restrict their use during warmer weather.

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Originally Posted by TitanMike View Post
If you locate the Lithium batteries in the living (heated) space there will be no issues with cold weather. Even if the temp drops below freezing and you need to run the furnace, they will discharge down to ~-4 F. If the living space is above freezing, so will the battery be.

The "winter charging" issue is more for then the batteries are mounted in battery boxes on the tongue or in an area more directly exposed to outside temps.

Charging can take place as long as the BATTERY is above freezing.
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Old 10-28-2021, 11:22 AM   #5
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I moved my LiFePo batteries into conditioned space and further back on the tongue. (Moving to LiFePo was easy choice: more capacity, less temperature sensitivity, no venting required, lighter than lead acid AND further back in the coach (but ahead of the axle(s) plus all the other benefits of LiFePo over lead acid, even $ in the long run). Using a tankwarming pad seems odd as (1) it'd be self-consuming and (2) you already are heating a space (of which the battery could take advantage). Just my .02.
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Old 10-28-2021, 12:18 PM   #6
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Originally Posted by Rhumblefish View Post
I moved my LiFePo batteries into conditioned space and further back on the tongue. (Moving to LiFePo was easy choice: more capacity, less temperature sensitivity, no venting required, lighter than lead acid AND further back in the coach (but ahead of the axle(s) plus all the other benefits of LiFePo over lead acid, even $ in the long run). Using a tankwarming pad seems odd as (1) it'd be self-consuming and (2) you already are heating a space (of which the battery could take advantage). Just my .02.
Tank warming pads would typically only be turned on prior to charging. LiFePo4 batteries can be discharged down to below zero, it's only charging that is the issue.

BMS will prevent charging (on good LiFePo4 batteries) until temp is above freezing. Turn on heating pad, start generator, and when batteries warm enough actual charging will commence. The heating process is powered by the charging source.

This of course would only be necessary if bateries are in unheated space.
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Old 10-28-2021, 02:15 PM   #7
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"Prior to charging" precludes solar, good buddy.

We're of the same mindset.
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Old 10-28-2021, 02:54 PM   #8
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"Prior to charging" precludes solar, good buddy.



We're of the same mindset.
If one is conceren about solar attempting a LiFePo4 battery a switch in the feed from the PV panels can solve that.

If one forgets to shut it off then the BMS handles the task.
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