Best place to fuse a battery bank?

[Frank B]

I have 6 GC-2's in battery bank in series parallel to give me a 12V system. In the event of a catastrophic short in one of the batteries, I want to put fuses in there. My thought is to put one in the series link between each pair of batteries. Right so far?

I do not have a separate buss to which all the batteries are connected.

Now, how big should those fuses be?

Thanks.

 

[Utclmjmpr]

All you need is one between the bank and the house feed,, my factory one is 300 amp fuse and I switched out to a resettable breaker of the same value..>>>Dan ( In 55 years of RVing, I have never seen or heard of one battery in a bank failing " catastrophically " )

 

[solarman]

I have 6 GC-2's in battery bank in series parallel to give me a 12V system. In the event of a catastrophic short in one of the batteries, I want to put fuses in there. My thought is to put one in the series link between each pair of batteries. Right so far?

I do not have a separate buss to which all the batteries are connected.

Now, how big should those fuses be?

Thanks.

The likely hood of that type of failure is extremely rare. I have only seen one case in a small system and that was due to abuse with overcharging and a bad plate assembly. For RV, I would suggest you not bother even though technically it might be correct, an RV is not subject to a plethora of city and electrical codes that an engineered system is. Here is a quick sketch of fuse placement assuming I have your battery setup right..