Attaching a fuse to a new set of batteries?

mlts22 wrote:
Due to various craziness in life, I let the batteries on my rig expire, so the only purpose they have is a core charge refund. This time around, I'm getting two 12 volt jars, using 36" 0 gauge cables with ring connectors to connect them in parallel, and fuse block with this fuse for it. The fuse will go on the positive side of the bank.

Other than going with 12 volt batteries, are there any downsides to fusing the battery bank with a 300 amp fuse? I can't think of any, and I'm doing this, mainly as catastrophic protection in case of a sh

Thanks for those two links you included! I've always wondered if something that simple and practical was available - of course I might have expected that the marine world would have fuse blocks and fuses like that.

One of those blocks and a 60 amp fuse will eliminate something I've been losing sleep over: I have two large 12V batteries in parallel and will use one of those fuse block setups in the negative paralleling cable that runs between the two batteries. This will protect from one battery every developing an internal short and the other battery dumping mega amps into the short for a possible nasty result.

A 60 amp fuse between the two batteries still permits the pair to deliver up 120 total amps into the RV's system. We don't use a super large inverter so only 120 amps from the pair should not ever be a limiting issue, but 120 total amps should still hopefully be plenty for starting of the Onan generator or emergency boost starting of the V10 chassis engine.

By the way .... this is an advantage of two 6V batteries in series - if an internal short develops in one of them the other won't mega-feed the short to create a hazardous situation.