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Curtis B.
Curtis B., Other
Category: Electric Vehicles
Satisfied Customers: 26052
Experience:  Worked on fleet of various electric vehicles, golf carts, scissor lifts and electric booms.
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Have an EZ-GO 36V cart (2007 model) with a Power Wise

Customer Question

Have an EZ-GO 36V cart (2007 model) with a Power Wise Charger 20A. Have had the cart for 5+ years with little problem, other than a bad battery from time to time. I have a reminder on computer calendar to top-off the batteries on the 20th of each month. Typically will be down less than 1/2 the head space above the plates. But suddenly in May the water level of most cells was at or near the top of the plates and surface of batteries are wet. I periodically check the health of the batteries at beginning of day by disconnecting the charger at the cart and reconnecting. The charger will kick-in at 15 to 20 amps but drop to less than 5 amps in about 30 sec. batteries held charge well overnight. With the onset of the problem it now will not drop below 10 amps even with the series voltage at 43 - 43.8 volts. Over-charging?!
- replaced the power control circuit board but charger continues pump 10 A at series voltage at 42 - 43+.
Any suggestions the next Step??
Submitted: 1 year ago.
Category: Electric Vehicles
Expert:  Curtis B. replied 1 year ago.
Charger is sensing that the batteries are not fully charged and will keep charging. It seems you have a bad battery or connection, any one will cause this. Check all your cables and connections, and each battery again. Your charger only sees the battery pack, and is trying to top off the battery it senses as the worse. It is always bad practice to replace one battery in a set of old batteries. It is expensive to replace all, but works for better performance and life over the long haul.