Forum Discussion

KenNTennessee's avatar
KenNTennessee
Explorer
Mar 15, 2014

Is it okay to link two batteries of unequal size?

We just bought a new travel trailer and it came with a dealer installed new 24MS battery, which does not have enough capacity for us as we do dry camping up to three days at a time. I am going to ins...
pianotuna's avatar
pianotuna
Nomad III
Mar 16, 2014
Hi,

You can do it while discharging at a high rate. Doing it while charging doesn't work too well as each chemistry type wants a different charge voltage. Connecting them in parallel while resting is a bad idea as one will act as a parasite on the other.

It is definitely not "best practise".

Lowsuv wrote:
Is it okay to parallel an AGM battery with a conventional battery ?

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