Question on battery gassing

bgrasspkr wrote:

1. Is it hydrogen gas that is produced by the battery.
2. Is the discharge highest during charging?
3. How concentrated can this get in the front basement of a 5th wheel trailer, ie enough to be dangerous?

So should I try to either design an enclosed area with a vent cover, or do they sell them in different sizes?

1: Hydrogen, oxygen in the ideal ratio of 2h to 1o, plus a bit of sulfur just to make it nasty.

2: During over charging, (Equalization) I believe its during charging in all cases though.

3: Varies with the degree of overcharge, and how fast the charge is, If you charge too fast it can get quite heavy.

When I stored batteries in the house I always set them on scrap wood, Now,, there are myths about "You should never set a lead acid battery on this or that kind of floor due to this or that mythical reason. But I ignore those,, I set it on wood, scrap wood at that, because if any acid got on the outside of the battery scrap wood was real easy to replace,, Unlike the floor below it, and by the time it ate through all that wood, not much acid (or for that matter any acid) left. And the floor was thus undamaged.

Should you try to design an enclosed box? I would build your wooden box as tightly as possible and then use a good sealing paint inside and out, You can use a good grade of sealant (GOOP?) on the joints to seal them, weather stripping is also good, Weatherstrip the lid and vent it like the original box, also provide a drain (PVC works well here) so you can easily rinse the box out.

And if you have room for two grop 27s You might see if you have room for a pair of GC-2,, Two 27s is just under 200 amp hours at the c/20 rate, two GC=s 220-230. More power as Tim Allen might say.