your post aligns with my understanding with a slight correction. The individual
cells are ~2 volts in series (6 X 2 volts = 12 volts) . On some of the older
surette batteries you could actually change out individual cells. I am still
trying to figure out why promariner insists on only connecting the to a single
battery. In theory, it is transparent to the charger whether it is two
batteries in parallel or or a single battery of twice the size (capacity). The
only think that makes sense to me is that the charger cannot sustain the bulk
charge rate long enough to charge 2 full depleted group 27s.
Cheers,Doug
On Friday, March 4, 2016 5:35 PM, Frederick G Street via CnC-List
<[email protected]> wrote:
Peter — please remember that six-volt and twelve-volt batteries are made from
1.5-volt cells; the only difference is the number of cells wired in series to
make up the battery. Two six-volt batteries wired in series are functionally
equivalent to a twelve-volt battery.
I can understand if that particular ProMariner charger doesn’t have enough
current to charge a large battery; but "each leg of the charger attached to a
single battery” would apply to two six-volt batteries wired in series. There’s
no way for the charger to know the difference, and electrically there IS no
difference.
Fred Street -- Minneapolis
S/V Oceanis (1979 C&C Landfall 38) -- on the hard in Bayfield, WI :^(
On Mar 4, 2016, at 4:03 PM, Peter Fell via CnC-List <[email protected]>
wrote:
No. It won’t work. It will not charge two batteries in a bank either in series
or in parallel by spanning across the batteries. It will only work with each
leg of the charger attached to a single battery. That is very specifically
identified multiple times in the literature. 6V golf cart batteries are a
no-go. Full stop. End of discussion. See my previous posts. If someone at
ProMariner or a retailer is giving you other info then they are wrong. I admit
that ProMariner support is a bit daft ... I’ve had to re-ask questions several
times to obtain answers to all the questions that I asked. The Pro-Sports I
think are decent chargers at a great price-point with some rather unique
features, like distributed charging ... but they have their limitations. Peter
Fell
Sidney, BC
Cygnet
C&C 27 MkIII
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