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Unread 12-06-2018, 10:40 AM   #11
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Default Re: Batteries---- mind blown

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Originally Posted by bospider01 View Post
To reset the OBC I just disconnect the negative on battery 6 (6 x 8v pack) that leads back to the controller? Do I need to be in run or tow? Unplug the charger as well I assume? What is the black wire with the yellow bullet connector called?
Always put the the cart in Tow when working on it.

Just disconnect all cables in the pack negative for more than 10 minutes to reset the OBC.

The black wire with yellow bullet connector comes from the Controller B- and it is used to provide the negative for your 12v accessories.
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Unread 12-06-2018, 01:05 PM   #12
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Default Re: Batteries---- mind blown

Before attempting to reset the OBC, I watched the charge cycle. When I plugged it in, At 12amp it climbed up to 57v. Then I watched the PD maintain 56.6v at 7amps shutting off and kicking back on for a few cycles. When it kicked off, it dropped like a rock to 54.5v. It would do this multiple times, off- 54v, on- 56.7v. After quite a while, at a maintained 5amps it slowly climbed to 60.5v then oddly dropped down to 57.3v. I turned my back for a second when that happened and didnt hear the charger shut off. Charger still on at 5amps, onboard meter climbed to 58.1v before I had to walk away for a while. At 60v, I tested with handheld meter and confirmed 10v at each battery and 60v across the pack.
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Unread 12-06-2018, 01:13 PM   #13
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Default Re: Batteries---- mind blown

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Originally Posted by Sergio View Post
Always put the the cart in Tow when working on it.

Just disconnect all cables in the pack negative for more than 10 minutes to reset the OBC.

The black wire with yellow bullet connector comes from the Controller B- and it is used to provide the negative for your 12v accessories.

Ok, so I can just disconnect the last negative going to the controller to reset the OBC or all the negative cables from each battery?
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Unread 12-06-2018, 02:59 PM   #14
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Default Re: Batteries---- mind blown

Just disconnect the cable that goes from pack negative through the OBC to the Controller B-.

That should be the only cable on that battery post.
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Unread 12-07-2018, 06:57 AM   #15
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Default Re: Batteries---- mind blown

My cart sat for 2 weeks. Iím sitting @ 51 volts. And the little meter is not 100% accurate. Your voltage should be higher after 2 days. When charging I have seen has high as 64 volts during equalization mode. This is with the OBC and PDII charger.


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Unread 12-07-2018, 10:06 AM   #16
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Default Re: Batteries---- mind blown

This morning I looked at the voltage, still on the charger but not charging, was 50.7V.

Ill reset the OBC this afternoon.
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Unread 12-07-2018, 02:10 PM   #17
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Default Re: Batteries---- mind blown

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Originally Posted by bospider01 View Post
I have read thread after thread and indepthly looked at our battery stickie... I just cannot seem to wrap my head around what I should be seeing versus what I should be expecting to see on my digital voltage read out.
Find below a State of Charge chart and a Trojan Charging Voltage chart for your reference. If your STATIC VOLTAGES or CHARGING VOLTAGES are well outside of these charts, then there could be a problem.
Attached Images
File Type: jpg Carts Unlimited State of Charge Chart.JPG (71.0 KB, 0 views)
File Type: jpg Trojan Charger Voltage Settings - 2015.JPG (55.7 KB, 0 views)
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Unread 12-11-2018, 07:29 AM   #18
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Default Re: Batteries---- mind blown

I'm pretty sure they were a few other responses that I can no longer see, weird.

I didn't reset the OBC yet, i wanted to see what the voltage was after a few days. So, after four days, I turned on the cart and the voltage read 49.9 V.
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Unread 12-11-2018, 08:37 AM   #19
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Default Re: Batteries---- mind blown

Little question on the Trojan charge voltage chart ThreeCW posted;

How long can the charger stay in the finish and equalization state of charge (64. before switching to the float charge (54) on a gen III DPI charger?
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Unread 12-12-2018, 08:53 AM   #20
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Default Re: Batteries---- mind blown

Reset the OBC and see the results. It is 1 bolt.


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