OBC or Batteries AHHHH!

PuttPutt

After doing a bunch of searches and reading, I think we have a bad OBC. But I am afraid to pull the trigger and buy a new one. Here is what I have so far:

Battery light on dash does not come on at all. Pull the power plug during the charge cycle no light to indicate an interruption.

Charger is staying on way over 16 hours. Not shutting off.

Charger is not doing the normal test cycle when plugged in, comes on in about 6 sec. But stays on
doesn't turn off and come back on.

Reset OBC. No Change.

Pack reaches 60.5 volts on the charger doesn't climb past that. Charger indicate 4.5 amps.

After 8 hours rest pack is at 50.4 volts 8.5 to 8.4 across the pack

On a slight hill when I mash the peddle volts drop to 43 then quickly go to 47 at 16 MPH.

The cart is performing well on the golf course.

Took each cable off and cleaned eyelets and battery terminals.

I tried a second charger and it was still going at 60.5 volts. Pack was at 50.x when plugged in left it on for about 3 hours never past 60.3volts at 4.5 to 5 amps. did not shut down automatically. Had to return the charger so couldn't leave it on.

So seems to point to the OBC

One last piece of the puzzle, the pack is 4 years old, which makes me question is it batteries or OBC.

Thanks
Afraid to pull the trigger, cha ching $$$$$$

BGW

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93yellowclubcar

Your batteries sound fine to me, most likely an OBC problem. You might consider, since you're spending the money anyhow, a DPI Charger from Scottyb. Does away with the OBC and is an all around better charger that also maintains the charge once the pack is fully loaded.

PuttPutt

Thanks 93, I was reading about the new chargers. About $200 for OBC, I haven't priced the DPI. I'll check into it.

Hecky50

You didn't mention which charger or how many batteries you have. Except for the charger not doing the first check on start up everything else seems normal. have you checked you batts with a Hydrometer? Are you batts boiling when at 60 volts? My 5 year old NAPAS (6 x routinely go to 60 volts. I am using a Powerwise 2 on a CC Precedent IQ.

PuttPutt

CC CQ 0518-502121 Powerdrive 2 with 6, 8 volt batteries yes did hydrometer'
some low cells just at the top of the white bottom of red.

1250 1228 1250 1225

1250 1223 1223 1228

1250 1252 1206 1225

1200 1250 1228 1250

1228 1250 1250 1206

1223 1250 1228 1225

PuttPutt

Thanks for the help. New OBC fixed it.