battery box for golf cart batteries

[newcruiserP10M]

Does anyone know of a commercial battery box designed to house 4 or 6 golf cart batteries? I am planning to install my housbank in my starboard rear quarterberth as I could never envision snuggling up with my engine in what feels like a cat scan machine. Does anyone know of some internet plans to custom make such a housing out of wood? I could probably slap something together to secure the batteries in the event of a roll but it would be like a plywood box bolted down to the quarterberth. Would have to figure out how to seal it from acid and make it airtight so I could vent the fumes out of the main cabin. (Or are fumes only really created if you overcharge by not having a good charge controller?). Heard seawater will create chlorine gas. Currently have two unvented 'marine' batteries in the engine compartment which is essentially in the cabin - run the blower frequently - how worried should I be about batteries? Is securing them physically enough or should I treat them like toxic gas machines?

[SVCetacea]

http://www.dynobattery.com/BoxGC2.pdf

I tried the above but it was just a bit too big for my boat, so ended up making my own from 3/4" plywood.

[whroeder]

Originally Posted by newcruiserP10M

Would have to figure out how to seal it from acid and make it airtight so I could vent the fumes out of the main cabin. (Or are fumes only really created if you overcharge by not having a good charge controller?). Heard seawater will create chlorine gas. Currently have two unvented 'marine' batteries in the engine compartment which is essentially in the cabin - run the blower frequently - how worried should I be about batteries? Is securing them physically enough or should I treat them like toxic gas machines?

You want them secured in case of roll over.
You put only distilled water in batteries. (sea water would kill them)
They give off H2 during any charging so don't put a lit match near them.
Don't seal the box, the H2 must get out.
Don't worry about the H2, the amount is small, it's lighter than air so not a explosion hazard. The blower is for gasoline fumes (heaver than air)

[mitiempo]

You don't really need a complete box. You do need a tray to catch any spills and the posts covered - positive at least. And they have to be strapped down so they don't move. If you build a plywood tray and epoxy the inside it will be acidproof. Best to not store anything that can move around in the same compartment.