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
From: Josh Muckley via CnC-List
Sent: Friday, March 04, 2016 10:29 AM
To: C&C List
Cc: Josh Muckley
Subject: Re: Stus-List Soliciting Advice on 33-2 Battery Complement
6v would be fine in series but from what I can tell from the manufacturer's
written and verbal guidance, the charger is limited to a certain maximum
battery size (group 31)... I assume Amp-hr limit. A group 31 is about 105 AH.
So if you are using two 6v @ 105 AH batteries then it seems you would be fine.
OTOH, I believe most golf cart batteries are upwards of 200 AH.
Some smart chargers have software that monitors the charge profile. If the
battery being charged deviates from the prescribed profile then it is deemed
bad.
Josh Muckley
S/V Sea Hawk
1989 C&C 37+
Solomons, MD
On Mar 4, 2016 12:56 PM, "Frederick G Street via CnC-List"
<cnc-list@cnc-list.com> wrote:
Golf cart 6V batteries should still be okay, as long as they’re connected in
series pairs to get the voltage up to 12V.
Fred Street -- Minneapolis
S/V Oceanis (1979 C&C Landfall 38) -- on the hard in Bayfield, WI :^(
On Mar 4, 2016, at 11:50 AM, Peter Fell via CnC-List
<cnc-list@cnc-list.com> wrote:
I asked ProMariner for some clarification on the battery situation with 2
house connected in parallel as one bank and a separate start as a second bank.
I also asked if there was any issue with using smaller than Group 24 batteries
with the charger. For example, the OP has a Group 22NF. Another poster
identified they were using a U1 AGM battery for a start (I’m assuming starting
something small like an Atomic 4 .... and I’ve heard of that before).
Answer from ProMariner tech support was that there is no issue with
connecting the ProSport 20 Plus (3-leg) charger to this battery configuration
provided you do 1 leg of the charger per battery and that there is no issue
connecting to any battery that is smaller than the amp-hour size of a typical
Group 31.
So there you have it.
If you want to go golf-cart 6V or 12V batteries larger than Group 31 or if
you want to mix battery technology (i.e. flooded + gel or standard AGM + gel or
standard AGM + premium AGM or ....) then look to another charger. Otherwise,
fill your boots.
Peter Fell
Sidney, BC
Cygnet
C&C 27 MkIII
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