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Unread 10-31-2016, 10:04 PM   #1
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Default new batteries not reaching full charge

I have a friend that has a 97 DS, he just installed new batteries ...not sure what brand but he says his stock charger shuts off at around 50 volts and the pack settles a 47.8...he is getting those numbers from a cheap Chinese led voltage display dash mount unit....any ideas why his batteries are not reaching a full charge ...my batteries will get up around 65 before the charger shuts off and they settle at around 52 or just under that ...I know 50.93 should be correct ? any ideas would help lead him in the right direction

Thanks
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Unread 10-31-2016, 10:14 PM   #2
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Default Re: new batteries not reaching full charge

Assuming the charger was working before the new batteries, the most likely scenario is that he attached the red wire coming from the charger receptacle to the wrong battery.

Make sure the red wire from charger receptacle is on the pack positive battery post.

If it was on the wrong post, disconnect the pack negative cable for more that 10 minutes so the OBC resets before charging the cart again.
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Unread 10-31-2016, 10:51 PM   #3
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Default Re: new batteries not reaching full charge

Kasey, call me tomorrow.
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Unread 11-01-2016, 10:21 AM   #4
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Default Re: new batteries not reaching full charge

I don't know about your friends batteries fishbooz but you are slowly destroying your batteries. The charger should never go higher than approx 58.5V. (unless you are in an equalization charge and then only 62V) You are seriously overcharging your batteries. Your charger is running wide open. You need to replace the OBC or get a new DPI charger.
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Unread 11-01-2016, 10:33 AM   #5
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Default Re: new batteries not reaching full charge

Quote:
Originally Posted by jjance View Post
I don't know about your friends batteries fishbooz but you are slowly destroying your batteries. The charger should never go higher than approx 58.5V. (unless you are in an equalization charge and then only 62V) You are seriously overcharging your batteries. Your charger is running wide open. You need to replace the OBC or get a new DPI charger.
Don't know Trojan seem to waver on this as my Trojan PDF list up to 64.8 volts while in Finish/Equalize mode....
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Unread 11-01-2016, 11:50 AM   #6
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Default Re: new batteries not reaching full charge

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Originally Posted by teecro View Post
Don't know Trojan seem to waver on this as my Trojan PDF list up to 64.8 volts while in Finish/Equalize mode....
My new Lester on board takes it's time and at a very low amperage takes the pack to 64v before cutting off. That is 2.67 VPC (volts per cell) which is higher than the 2.45 vpc (58.8v) I am used to. But I remember CC chargers using 63v or 2.63vpc cut off.... I will ask Trojan what they think about these #s and how they apply to their 6v, 8v, and 12v batteries
We should have the info needed soon
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Unread 11-01-2016, 01:39 PM   #7
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Default Re: new batteries not reaching full charge

Trojan Battery not only makes the best GC battery but like another industry leader (Alltrax) they have the best tech support ever, not coincidental, I'm sure.

Stacey tells me 2.7vpc is their recommendation for an equalization charge and that applies for all batteries regardless of 6,8 or 12 volts. Specifically the 2800 Lester with it's 2.67vpc is within the safe range.

So I ask the question for you;
Is it safe to use the 2.67vpc (64v) finish voltage for every charge cycle?

Her answer was yes so long as the batteries do not gas for more than 1 hour. Adding:
The current is very low when the voltage is high, so there really isn’t a lot of overcharge happening (at that high voltage) if you look at it in terms of amp hours ( 1 amp for 1 hour on charge = 1 amp hour).

I hope this helps
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Unread 11-01-2016, 01:42 PM   #8
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Default Re: new batteries not reaching full charge

Maybe we better check with cartfixer. He has all the answers.
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Unread 11-01-2016, 01:54 PM   #9
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Default Re: new batteries not reaching full charge

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Originally Posted by gornoman View Post
Maybe we better check with cartfixer. He has all the answers.
That is what it is now isn't it?
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Unread 11-01-2016, 02:00 PM   #10
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Default Re: new batteries not reaching full charge

Quote:
Originally Posted by scottyb View Post
Trojan Battery not only makes the best GC battery but like another industry leader (Alltrax) they have the best tech support ever, not coincidental, I'm sure.

Stacey tells me 2.7vpc is their recommendation for an equalization charge and that applies for all batteries regardless of 6,8 or 12 volts. Specifically the 2800 Lester with it's 2.67vpc is within the safe range.

So I ask the question for you;
Is it safe to use the 2.67vpc (64v) finish voltage for every charge cycle?

Her answer was yes so long as the batteries do not gas for more than 1 hour. Adding:
The current is very low when the voltage is high, so there really isn’t a lot of overcharge happening (at that high voltage) if you look at it in terms of amp hours ( 1 amp for 1 hour on charge = 1 amp hour).

I hope this helps
Good to know. Thanks for taking the time to research it. My Lester Links charger is taking my T 875's to 65plus volts also. Charger and batt's are new
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