Odyssey PC680 Battery
Discussion
Any help/suggestions from the electrical gurus would be gratefully appreciated.
I have a Griffith with 2 Odyssey PC680 batteries wired in parallel, they are connected to an onboard Optimate battery charger.
The charger shows two green light strips which I take to mean that both batteries are charged. In between the green lights there is
an orange strip light that I think shows when lit that the batteries are being charged. The issue I have is sometimes the green lights are steady,
sometimes one green light strip is lit and the orange strip is lit and sometimes the unlit green strip turns red, so one green one red.
My suspicion is that one battery is breaking down, anyone able to suggest what is going on?
Do you know which optimate model you have? There are pictures of them here if it helps to narrow it down https://www.optimate.co.uk/manuals/
Belle427 said:
That`s a strange set up having 2 in parallel, there isn`t any need for it really but I suspect that`s the issue the charger is having.
I think that's because they used the PC680 ... it only delivers 170 CCA compared to the PC1100 with 500 CCA which most have used in the past.Thanks for the replies, I've been thinking about the issue so I looked on the Optimate website, I know, which is
where I should have started. Anyway the charger is an Optimate 4 which has, as I said, two light indicators left and right
as you look at it. I wrongly assumed that left and right lights equaled my two batteries, they don't! Left is battery charging
the right indicates ability to hold a charge. I now have to figure out if one or both batteries are failing to hold a charge.
The reason for two parallel batteries was to clear the footwell and move the batteries to one behind each seat.
Safer than the boot, easier access, more legroom and better weight distribution.I have run the batteries like that
for at least 5 years with no issues. I get double cold cranking amps 340a which starts the LS3 engine every time, even now
with them not able to hold a charge.
where I should have started. Anyway the charger is an Optimate 4 which has, as I said, two light indicators left and right
as you look at it. I wrongly assumed that left and right lights equaled my two batteries, they don't! Left is battery charging
the right indicates ability to hold a charge. I now have to figure out if one or both batteries are failing to hold a charge.
The reason for two parallel batteries was to clear the footwell and move the batteries to one behind each seat.
Safer than the boot, easier access, more legroom and better weight distribution.I have run the batteries like that
for at least 5 years with no issues. I get double cold cranking amps 340a which starts the LS3 engine every time, even now
with them not able to hold a charge.
The Three D Mucketeer said:
I have a PC1100 behind the drivers seat and the fuse box behind the passengers , gives easy access to both....admittedly in a Chim with a small modification. Been there for 14 years now IIRC.
I looked at that option, but there is not enough room behind the Griff seats for a large battery. The PC680 was just the right size.So I thought why not a pair in parallel, I got the idea from the MGB setup that had I think a six volt battery behind each seat.
I underestimated the time they've been place in its probably 10 years so maybe a pair of new batteries is needed.
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