Battery Condition Gauge

pcvst.tech · 12-08-2020, 02:03 PM

The plumbing shop pushed in one of their Carry All 6 carts this morning, someone had left the little heater box on all night and ran the batteries too low to kick on the charger. I brought the batteries back up two at a time with a mobile 12v charger and now the whole bank is reading a little over 49 volts, but the little digital dash gauge is still showing low, the first two bars flashing back and forth. The on-board charger is not kicking on, though there is a solid click sound after a few seconds plugged in, but considering the bank is at 49 volts I don't think it should be coming on now anyway. These batteries were replace in March. Any ideas what this digital gauge is trying to tell me?

Sergio · 12-08-2020, 02:19 PM

If You have not done so yet, disconnect the pack negative cable for 10 minutes and then reconnect it.

That will reset the OBC and allow it to charge again.

That meter will not reset until it measures 56v for a few minutes, which will happen when you charge.

kernal · 12-08-2020, 02:21 PM

Assuming the cart is 48v, 49v is high enough for the charger to start charging if working normally.
The battery gage most likely needs to see a certain voltage for a specific time period to reset. For example: 58v for 6 minutes or something like that during the charge cycle. The charger/OBC should take the pack upwards of 65v or so before automatic shut off.
You can reset the battery gage to show full if you disconnect one of its leads from the batteries for a few seconds but then it will be lying to you of course.

And what Sergio said.

Bama Brad · 12-08-2020, 03:18 PM

Quote:

Originally Posted by pcvst.tech

Any ideas what this digital gauge is trying to tell me?

The biggest thing it is telling you is that it is a POS...tell them to replace with a digital voltmeter, they real cheap and gives better idea of health of the pack.

pcvst.tech · 12-08-2020, 04:46 PM

Quote:

Originally Posted by Sergio

If You have not done so yet, disconnect the pack negative cable for 10 minutes and then reconnect it.

That will reset the OBC and allow it to charge again.

Thanks, Sergio, that did the trick!

12-08-2020, 02:19 PM	#2
Sergio Gone Wild Join Date: Sep 2012 Location: Charlotte, NC Posts: 9,329	Re: Battery Condition Gauge If You have not done so yet, disconnect the pack negative cable for 10 minutes and then reconnect it. That will reset the OBC and allow it to charge again. That meter will not reset until it measures 56v for a few minutes, which will happen when you charge.

12-08-2020, 02:21 PM	#3
kernal Gone Wild Join Date: Jul 2010 Location: Peachtree City, Ga. Posts: 2,759	Re: Battery Condition Gauge Assuming the cart is 48v, 49v is high enough for the charger to start charging if working normally. The battery gage most likely needs to see a certain voltage for a specific time period to reset. For example: 58v for 6 minutes or something like that during the charge cycle. The charger/OBC should take the pack upwards of 65v or so before automatic shut off. You can reset the battery gage to show full if you disconnect one of its leads from the batteries for a few seconds but then it will be lying to you of course. And what Sergio said.

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