Adding batteries in parallel

[mik]

I want to even out the weight distribution in my 2019 R-23. Is there any issues I should be concerned about if I add 1 or 2 more batteries to the house bank? All are currently 110aH AGM. I would be adding the same batteries that are currently installed and installing them in the starboard lazarette. Thanks, Mike.

 

[Jared Dunning]

Yes, you can add them. However, you will need to make sure the battery charger and inverter are properly configured for AGM batteries. Which they should be already, but verify.

You will also want to install an appropriately sized fuse between the two house battery banks for circuit protection. This fuse is intended to protect the wiring between the battery banks, not the entire house electrical system. Therefore, the fuse should be sized according to the wiring and expected current load, rather than simply matching the existing main house battery fuse rating.

Edit: 100a fuse will work for the wiring between the two house bank batteries.