Cold Battery Protection Box

[merango]

Hi everyone,

Following on from some others here that had the issue of cold batteries not charging below 15 degrees, I took the plunge and built a nice insulated box for the garage and the batteries are now sitting at 22 degrees on a winters night. I was getting 10-11 degrees on a night and the 3-phase charge was limited to 1.7Kwh which was a massive issues to night time fast charging on 3-phase.

It's not 100% finished but a lot better and good for the colder nights in the UK as we head into winter.

I used 11mm board with 50mm PIR bonded to the board. PIR for the floor with an airgap underneath and around battery feet. 300mm airgap all around with a 120mm top air gap.

I'll tape the edges once its all locked down, have the lid fixings to install and then it's completed. But I'm rather happy for 4-5 hours work. Pictures 1-20 in order

Just sharing the pictures if people are interested.

[merango]

More pics

[CDubbs]

Good work, that looks good.

I’ve knocked up today a cover for an EP11 heated battery that’s outside, I have a cover over the battery so this encloses the cover. Advice from the installers is that there is no issue enclosing the battery for winter use.
Run out of Gorilla tape, so can’t put the waterproof membrane over the box until tomorrow.
Used 50mm insulation board.
Appears to work, temp has risen 3C in 4 hours since putting it over the battery to 16.5, will be interested what it will be in the morning after force charging tonight.

[merango]

Looks good, this is the way to go right, just wish my batteries came with a internal heater for the price I paid!

Getting a good temp now, 19 - 21 degrees depending on outside temps but works well.