Venting batteries

[jeroen]

I've ordered a metal trailer tongue box (https://www.etrailer.com/Toolbox/MaxxTow/MT80350.html) to hold my batteries. (Tip: they're really cheap now: 65 dollars). It seems like it's water tight so I assume I need to add a vent to it to keep it safe. How much vents do I need? I've ordered two of these: https://www.etrailer.com/RV-Vents-an...RoCQlgQAvD_BwE. Is that enough/too much?

[floyd]

One of those near the top would be overkill.
In fact, you could simply cut small section of the seal from each end of the box and you would have plenty of vent especially for an outside box.
You could also consider drilling a couple of holes around the top of the box under the lip.

[Ed Harris]

Originally Posted by jeroen

I've ordered a metal trailer tongue box (https://www.etrailer.com/Toolbox/MaxxTow/MT80350.html) to hold my batteries. (Tip: they're really cheap now: 65 dollars). It seems like it's water tight so I assume I need to add a vent to it to keep it safe. How much vents do I need? I've ordered two of these: https://www.etrailer.com/RV-Vents-an...RoCQlgQAvD_BwE. Is that enough/too much?

I ran out and snagged one of these Today as they seemed like a pretty good deal for the money and just a caution,they are pretty thin skinned.
I am not sure I would place a battery on there much less multiples without reinforcing the floor of the box somehow first.

I will either run Strut under the floor or plywood or thick High TechPoly material(cutting board)inside on the floor but I am a little afraid that without this the batteries may find their way to the ground in some time?

Let me know what you think when you get yours.

[k0wtz]

I use the black battery cover its vented and its mounted outside behind my propane tank.

cheap and works!

bob

[gordon2]

I believe you will want a vent at the high point in the box for the lighter-than-air hydrogen to escape, and a vent at the low spot for an air inlet and to drain water. They do not have to be very big. I am not aware of any engineering studies or standards on the subject but I'll bet they are out there somewhere.

[jeroen]

Mine came in today. A few small scratches but not bad. I like it a lot for the price, but I will put down some 3/4" ply at the bottom before I store a battery in it.

It's great to store my 30amp cord, and spare propane/butane canisters for cooking and the Mr. Heater. I don't use a large tank.

Originally Posted by Ed Harris

Let me know what you think when you get yours.