Keeping air dry in a shelf of batteries?


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Oleksii

Member
Joined
Mar 18, 2020
Messages
74
Keeping air dry in a shelf of batteries. How to reach that?

Imagine that I have a cold (no heating) garage, where I can put by shelf (a box which can be closed actually) with batteries.
The temperature in the garage can drop up to +1-2C. Sometimes it can be freezing too, so I'm planning to heat air inside the shelf (@Wolf showed us how that is possible to implement efficiently).

But, the issue is that air in the garage is far to be dry. It's actually quite wet (snow melting from car wheels ....) which makes me hurt.

Question is - does anyone has experience of making air dry in an enclosure?
On Aliexpresee (and everywhere) are cheap (~30$) and compact dehumidifiers. I'm thinking to buy one to try.
Wolud be happy to hear other opinions before I waste some $$ to something useless :)
 

OffGridInTheCity

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Dec 15, 2018
Messages
2,125
I don't do anything about humidity for my battery bank. It's under the house / open (via vents) to the outside and reaches 60% relative humidity at times.

What's your concern with humidity?

Would a dehumidifier work for you?
 

Korishan

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Jan 7, 2017
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Firstly I'd put some kind of tarp or other cover over the rack if it can get wet. If the garage area is high humidity, you could enclose the rack and something like DampRid. It's a moisture absorbing material. It can last quite a long time before it needs to be replaced.
Enclosing the rack wouldn't be a temperature issue if the garage temps are that low.
 

Oleksii

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Joined
Mar 18, 2020
Messages
74
The garage is one option (it could get frozen at winter and has increased humidity at winter). So it needs heating and dehumidifier on winter time only.

But I had another space to choose for batteries shelf - "cellar" (don't know is it correct term).
In made from concrete walls and siling. In winter time it can reach +2 at the lowest possible temp, so it does not get frozen. So heating shelf there is not mandatory, but of course, it's better to have it. Good thing for this space it's safer to keep Li-Ion batteries and less hot in the summertime (+20C at max).
But the cellar is half underground and has open ground on floor, so humidity there is higher than normal and it's 365/24/7.
So a dehumidifier there is really required.
 

Korishan

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Jan 7, 2017
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6,943
Pretty much if you want to keep the batteries dry, just have them inside of an enclosure and then remove moisture from there. You'll use a lot less power keeping the moisture out that way.
So kind of make a room inside the room. Maybe something like a large wardrobe that's mostly sealed (still need a little air flow)
 
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