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Unread 09-09-2014, 12:54 PM   #31
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Default Re: Another "power drive 2 charger not shutting off"

Hi. Did you manage to solve your problem? I also have a Powerdrive charger that sticks on when it gets down to 4 amps and will seemingly charge for ever. I would be really grateful if you would have a look at my thread "My 2001 DS won't stop charging" and give me any advice based on your experience. Many thanks in anticipation.
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Unread 09-09-2014, 01:10 PM   #32
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Default Re: Another "power drive 2 charger not shutting off"

To be honest, I haven't figured it out yet. I think my batteries are weak. If you look my last posting. I guess it's possible my obc may have a problem because the battery warning light never shows even though my voltage is low. I wish there was a way to test the obc.
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Unread 09-09-2014, 01:36 PM   #33
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Default Re: Another "power drive 2 charger not shutting off"

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Originally Posted by fngcarter View Post
To be honest, I haven't figured it out yet. I think my batteries are weak. If you look my last posting. I guess it's possible my obc may have a problem because the battery warning light never shows even though my voltage is low. I wish there was a way to test the obc.
Thanks for that. It's reassuring that I'm not the only one with this problem but no less frustrating that nobody seems to be able to give a solution. If I get anywhere with solving my buggy's problem I'll let you know. Good luck!
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Unread 09-09-2014, 01:44 PM   #34
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Default Re: Another "power drive 2 charger not shutting off"

Does the on-charge battery voltage reach 58.3 volts or higher once the ammeter on the charger drops to 5 amps or below? If it's at least this high, the computer is bad. It should be turning the charger off. If it's lower, it's probably a battery problem.
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Unread 09-09-2014, 02:00 PM   #35
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Default Re: Another "power drive 2 charger not shutting off"

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Does the on-charge battery voltage reach 58.3 volts or higher once the ammeter on the charger drops to 5 amps or below? If it's at least this high, the computer is bad. It should be turning the charger off. If it's lower, it's probably a battery problem.
Do you mean as soon as it drops down to 5 amps or after it's been stuck on 5 amps a while?
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Unread 09-09-2014, 02:49 PM   #36
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Default Re: Another "power drive 2 charger not shutting off"

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Do you mean as soon as it drops down to 5 amps or after it's been stuck on 5 amps a while?
Either one. If the charger is at 5 amps or below it should be nearing the charge cycle and the OBC will begin to look for turn-off voltage.
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Unread 09-09-2014, 03:29 PM   #37
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Default Re: Another "power drive 2 charger not shutting off"

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Originally Posted by TahoeDawgZ71 View Post
Either one. If the charger is at 5 amps or below it should be nearing the charge cycle and the OBC will begin to look for turn-off voltage.
Is there any chance that a healthy OBC could be looking for an on-charge turn-off voltage of 64.5+? Would the OBC continue to tell the charger to keep on charging if one or two batteries were below optimum charge, even if the total pack charge was 63+ volts?
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Unread 09-09-2014, 03:57 PM   #38
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Default Re: Another "power drive 2 charger not shutting off"

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Is there any chance that a healthy OBC could be looking for an on-charge turn-off voltage of 64.5+? Would the OBC continue to tell the charger to keep on charging if one or two batteries were below optimum charge, even if the total pack charge was 63+ volts?
There are several different versions of OBCs so there are several different methods that the OBC uses to determine when it feels like it's necessary to turn off the charger, however all of them must see at least 58.3 volts at or below 5 amps. The OBC can't determine where that voltage is coming from. It cant tell that you may have a problem with batteries 2 and 5.... It doesn't know the difference. All it sees is total voltage and if it sees 64.5 volts then it should be turning the charger off.
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Unread 09-09-2014, 04:18 PM   #39
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Default Re: Another "power drive 2 charger not shutting off"

Apologies for hijacking your thread, fngcarter. I feel I am still no nearer a solution without taking a hefty chunk out of my bank balance. I live in England and the prices here for batteries and onboard computers are even higher than in the USA. A new set of batteries would cost me the equivalent of $1050 and an onboard computer around $300, so I don't want to be spending that kind of money unless I am sure of what the cause of the problem is. I guess that you feel the same. In the meantime, I shall continue the band-aid method of charging the batteries after each round of golf until the batteries reach 62 volts and switch the charger off manually.
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Unread 09-09-2014, 04:35 PM   #40
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Default Re: Another "power drive 2 charger not shutting off"

No problem I just want to figure this out as well. My on charge voltage after 17 hours and @4 amp was around 62v so it should've shut off. I just can't tell my wife I need to buy another set of batteries only 1 1/2 years later. However they're only about $6-$700 for six
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