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Unread 04-09-2019, 02:40 PM   #11
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Default Re: Battery Gauge Question

No need to apologize. Wasn't sure if you meant the green light on your cart caused you to unplug the charger. Carry on.
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Unread 04-09-2019, 05:07 PM   #12
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Default Re: Battery Gauge Question

One more thing. Are you sure your cart is 36 volt. These carts were 42 volt 7 - 6 volt batteries I thought. Look on the charger and make sure it says 36 volts, and not 42 volts
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Unread 04-09-2019, 06:17 PM   #13
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Default Re: Battery Gauge Question

It has (6) 6 volt batteries (3 caps)..charger is 36 volts...thanks, it's always good to double check....I wanna learn all about these things...I never knew they could be so fun to use...
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Unread 04-11-2019, 03:33 PM   #14
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Default Re: Battery Gauge Question

I received the digital volt meter from Scotty this morning...Easy to read, bright and straight forward wiring...I choose to wire the positive to the ignition switch....Took it for a little ride and i was concerned the meter was reading 34.5 and 35 voltages...Then i had to slow down and stop and it went up to 37.2...I am guessing the lower reading were because of the drain of acceleration and the real gauge of the battery health is when stopped? Parked it and before i put the charger on i was reading 37.5...is all good? thanks,jeff
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Unread 04-11-2019, 07:14 PM   #15
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Default Re: Battery Gauge Question

There are three battery pack voltages that occur under different condition and at different times and you have to know which is present at the time to understand what your dash mounted DVM is telling you.

1. On-Charge voltage. While the battery is being charged, the voltage will climb until the charge terminates. What the on-charge voltage climbs to is determined by the make/model of charger and what charge profile is loaded or selected. The Lester Summit (Summit-I is retro-naming that occurred when the Summit-II was introduced) can be configured for Wet-cell, AGM and Gel-cell batteries and for different brand batteries. Hopefully, your charger is configured for US Battery brand and wet-cell.

2. Under-Load voltage. The battery voltage drops when amps are drawn. The higher the amp draw, the lower the under-load voltage goes. Try to stay above 1,75VPC (Volts per Cell) while driving cart, that's 31.5V for a 36V battery pack. Never go below 1.5VPC (27.0V for a 36V pack), that is where irreversible physical damage occurs.

3. At-Rest voltage. This is the voltage that is used to make SoC (State of Charge) estimates and occurs about 12 hours after the charger shuts of or about an hour after the cart stops being used. Attached a a SoC chart for US Battery brand batteries.
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File Type: jpg USB SoC 36-42-48V.jpg (176.8 KB, 0 views)
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Unread 04-11-2019, 08:55 PM   #16
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Default Re: Battery Gauge Question

Thank you JohnnyB....The Lester Summit can be configured or it can be bought to accomodate certain types of batteries???....Think mine is a sealed device...Thanks for the good advice...Jeff.....came back from a ride ..looked at charger said wet cell......18 cells
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Unread 04-12-2019, 07:43 AM   #17
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Default Re: Battery Gauge Question

The configuration info is on Pg-8 of the attached owner's manual.

If the At-Rest voltage is 38.5V, it is fully charging the batteries.
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File Type: pdf Summit manual copy.pdf (1.04 MB, 0 views)
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Unread 04-12-2019, 04:05 PM   #18
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Default Re: Battery Gauge Question

Thank you Johnnie B (good )...Will look for the 36 volt Summit manual...
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Unread 04-12-2019, 04:08 PM   #19
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Default Re: Battery Gauge Question

He attached it. Just click on it.

That's what "attached" means.
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Unread 04-12-2019, 08:35 PM   #20
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Default Re: Battery Gauge Question

Thank you..I clicked and printed it out...
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