Assuming you simply want to double your storage capacity, put the batteries side by side, wire positive to positive and negative to negative.  You now have 12 volts with 2ce the ampacity. Others may offer some advice on charging...but I think you should be reasonably ok, except it will take a bunch longer to charge as you have 2ce the capacity that you
need to fill.

On 2022-07-04 10:41, Hoyt, Mike via CnC-List wrote:

Actually is for an RV but I can think of no better place to get answer to this type of question than this list.

Came with one group 27 deep cycle battery.  Wish to add a second and have been told that nothing needs to change re the charging systems, etc … What is involved in adding a second group 27 battery?

Thanks

Mike Hoyt

Persistence

Halifax, NS


--
Cheers,
  Jeff Nelson
  Muir Caileag
  C&C 30 - 549
  Armdale Y.C.

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