camelot-forum.co.uk

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No problems here in the NE Aberdeenshire. Can see minus 6 at night here. Stack is in unheated garage with insulated roller door.

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Mine are in an uninsulated attic (well very insulated form the house! It get's cold in there!). I have seen the BMS report that max charge rate of 5A per battery in the very coldest conditions. This limits my stack to 1200W of charging. Not a problem from solar because I don't generally have 1200W spare to put in the batteries on those days! I charge from grid electric overnight but on those days the batteries charge at 5A (each) for the first 30 mins or so then revert to 25A per battery once the charge current has warmed them up.

Seeing as you're in the south-east, I wouldn't worry.

All my lithium batteries (including Pylontechs) make no noticeable heat, unlike my Lead Acid forklift cells which used to run 10 degrees above ambient.

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marshman wrote: ↑Mon Feb 07, 2022 10:52 am

Joeboy wrote: ↑Mon Feb 07, 2022 10:26 am No problems here in the NE Aberdeenshire. Can see minus 6 at night here. Stack is in unheated garage with insulated roller door.

Thanks Joeboy, do you know what the temp inside the garage goes down to? Is the garage attached to the house or detached?

Garage is attached and in extremes we will have frozen water bottles out there. Maybe 10 days of year? Maybe cast an eye over again and consider ventilation to keep the air dry?

I have some Growatt batteries and some Pylontech (temp install) in an unheated steel portal building with steel sheeting, uninsulated, the Growatts will not charge some days due to temperature but the Pylon have been ok.

Joeboy wrote: ↑Mon Feb 07, 2022 12:07 pm Maybe cast an eye over again and consider ventilation to keep the air dry?

I get condensation on my steel sheets internally, it's the nature of the construction and keeping the air dry enough is impossible. They do do sheets that have an anti condensation internal coating to help stop it. I have also heard of a paint product being used as well to help stop it.

Tinbum wrote: ↑Mon Feb 07, 2022 7:51 pm

Joeboy wrote: ↑Mon Feb 07, 2022 12:07 pm Maybe cast an eye over again and consider ventilation to keep the air dry?

I get condensation on my steel sheets internally, it's the nature of the construction and keeping the air dry enough is impossible. They do do sheets that have an anti condensation internal coating to help stop it. I have also heard of a paint product being used as well to help stop it.

You can get rack heaters: https://www.canford.co.uk/CANFORD-RACK-HEATERS Sorry to link to the same company for racks on another thread - no personal gain but I have used them myself for things.

I see on the Victron forum, many people with Lithium batteries have heating matts, and now you can control relays from temperature sensors with a Victron GX system.

I've just got a tonne of lead with a fan purely for gas removal and keeping cool during charging, but they're not fussy to charging when they're cold like lithium are.