Club 80-90 Forums

Mocki wrote:yes it is lighter than air.... however proper leisure batterys have vent tubes, and i assumed they were proper leisure batterys, and so a drop vent would be ok as the gasses can only go where the tube takes them, down through the drop vent. This is one reason why you should have leisure batterys over normal cranking batterys.(although with a petrol t25 its mostly irrelvent as the cranking batttery is also in the living area anyway.
But lead acid batterys produce minimal hydrogen unless over charged, ie you keep charging when battery is at max.

have a read here and

Thanks Steve.

They are proper leisure batteries and appear to have a small breather hole on each end, but weren't supplied with any tubes of any kind. Shouldn't be any problems with over charging because the system is designed to sense full capacity then go into trickle charge mode.

72BUG wrote: They are proper leisure batteries and appear to have a small breather hole on each end, but weren't supplied with any tubes of any kind.

What size is the connection for the tube on the batterys, might be able to help! text me the size (number in sig) as off to work in a bit!

jamesc76 wrote:

72BUG wrote: They are proper leisure batteries and appear to have a small breather hole on each end, but weren't supplied with any tubes of any kind.

What size is the connection for the tube on the batterys, might be able to help! text me the size (number in sig) as off to work in a bit!

Hi James.

It's not really a connection, just a hole with an od of about 8mm. Would need some sort of insert to connect a tube to it.

i measure some stuff up at work might be able to push um in then can just drill a few holes to poke the pipe out the bottom?

jamesc76 wrote:i measure some stuff up at work might be able to push um in then can just drill a few holes to poke the pipe out the bottom?

Cheers James.

Sounds like the way to go. If I get some 4mm T connectors I can T off each battery and run the pipe out of the same holes I've already made for the cables. Saves me cutting another hole in the locker.

72BUG wrote:

jamesc76 wrote:i measure some stuff up at work might be able to push um in then can just drill a few holes to poke the pipe out the bottom?

Cheers James.

Sounds like the way to go. If I get some 4mm T connectors I can T off each battery and run the pipe out of the same holes I've already made for the cables. Saves me cutting another hole in the locker.

72BUG wrote:. If I get some 4mm T connectors I can T off each battery and run the pipe out of the same holes I've already made for the cables. Saves me cutting another hole in the locker.

erm, no, that wont work, you need a completely seperate breather tube for each battery, or it would be possible for one battery to push gasses into another...... there must only be one path the gas can take ....

but if you are going to box the battery section in, make it gas tight and you only need one drop vent for the whole locker.....

Mocki wrote:

72BUG wrote:. If I get some 4mm T connectors I can T off each battery and run the pipe out of the same holes I've already made for the cables. Saves me cutting another hole in the locker.

erm, no, that wont work, you need a completely seperate breather tube for each battery, or it would be possible for one battery to push gasses into another...... there must only be one path the gas can take ....

but if you are going to box the battery section in, make it gas tight and you only need one drop vent for the whole locker.....

Oh b@ll@cks. I've just ordered a load of T connectors now.

I don't see why it wouldn't work. Even i the gas flows too and fro between the batteries it would always ultimately vent before building up to dangerouse levels, which is the whole point.

Mocki wrote:

72BUG wrote:. If I get some 4mm T connectors I can T off each battery and run the pipe out of the same holes I've already made for the cables. Saves me cutting another hole in the locker.

erm, no, that wont work, you need a completely seperate breather tube for each battery, or it would be possible for one battery to push gasses into another...... there must only be one path the gas can take ....

but if you are going to box the battery section in, make it gas tight and you only need one drop vent for the whole locker.....

I'm not saying you are wrong Steve but consider that each battery is in effect 6 batteries and those 6 batteries only have one vent (6 seperate cells with 1 collective vent hole)
6 cells / 30 cells, same difference, as all should be venting at the same rate etc. Each battery is sealed apart from it's vent so the gas being produced can only go one way, out to atmosphere surely.
Martin

i thought we were worried about safety here?
ok, yes, i know each battery is multiple cells, but its all within one case, under one lid, but not gas seperate.

If one battery starts failing and produces more gas than the one next to it, and it is closer to the outlet of the vent than 3 others, the gas from the three others wont exit.

like i said, it very much doubt that the charging system would be capable of over charging anyway, unless its had a bank charger and control fitted.

Mocki wrote:If one battery starts failing and produces more gas than the one next to it, and it is closer to the outlet of the vent than 3 others, the gas from the three others wont exit.

I still can't see why steve?
As long as the pipe is of sufficient diameter to carry the amount of gas being produced why are over gassing cell/cells further along the vent line, going to restrict other batteries from venting?

I would have thought this was a simple case of the gas finding the only route out the battery (otherwise it would pressurize the battery casing).
The gas from an 'overgassing' cell cannot go back up the vent to another battery as that would mean it would be acting against pressure (like blowing into a bottle with you lips sealed around the neck)

Having said all of this, one central vent in the base of this outside locker is probably the best bet anyway.

Martin

I got 2 6v Trojan traction batteries together.

It beats me why people paying out and hooking a load of leisure batteries together, which probably takes more space! I think Kev the rev be with me on this!

In 2009 I paid out £220 for both. Massive amount of power minimual space required. Never ever need hook up! Saves me £4 everynight every where I stay (so batteries have paid for themselves). Oh and never had to ever take them off and recharge them either!

Did Scotland last year and about to do Wales. Power sorted!

nesty wrote:I got 2 6v Trojan traction batteries together.

It beats me why people paying out and hooking a load of leisure batteries together, which probably takes more space! I think Kev the rev be with me on this!

In 2009 I paid out £220 for both. Massive amount of power minimual space required. Never ever need hook up! Saves me £4 everynight every where I stay (so batteries have paid for themselves). Oh and never had to ever take them off and recharge them either!

Did Scotland last year and about to do Wales. Power sorted!

You have a t25, Martin has a massive yank motor home! For £220 i can buy loads of batterys ! Plus is £220 really better value than £4 a night for a hook up? By my maths that dont add up!

Didn't know he had a yank mobile home it's a T25 site I was commenting for a T25. If then you have the space then go for it. I trialed both ways for a T25 and found that paying for the trojans worked out.

I've done 60 nights without paying a £4 (perhaps more for hook up) & will be for many years to come. So far = £240 saving. Works out to me!

nesty wrote:Didn't know he had a yank mobile home it's a T25 site I was commenting for a T25.

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