Adding more batteries
I'm fully in the grip of winter up here so contemplating spring projects. I have a truck camper with a battery box that only allows for 2 grp 27 batteries which I have installed now (2 x 12v) I ...
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wa8yxm wrote:Boon Docker wrote:
Bad idea, different charge/discharge parameters. Go with 2 more GP 27's then hook them all together.
Ah the old "All batteries must be identical" Myth.
I run a pair of GC-2 in parallel with 3 Group 29 MARINE/deep cycle.. I use the Sealed G-29's due to their location, if I ever get the system set up the way I want I'll go to 3 pair of GC-2 but in 11 years I've had to replace the batteries ONE time, 3 year ago (The anniversary date for the RV is MAY, the batteries lasted 9 years) No problems.
The only charging prameter that is seriously different is "Max Charge Current" is higher for The GC-2 but a slower charge rate means longer battery life (overall)
No offense intended, but shouldn't full disclosure be in force
You have been pretty much in place with shore power for three years
And before that mobile from place to place but primary shore power use, not significant dry camping use
If I'm incorrect I know you will fill in the correct info
Almost any battery will last years if very rarely used and mostly on float charge, doing standby duty
