3000w-5000w problems

lewiv

1 µW
Joined
Jul 7, 2022
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My 72v 50a 3000w-5000w motor will not run. It will run with charger connected but, unplug the charger and it will not run. When plugged in the display shows 100% battery charge. Unplug the charger and it shows 0% battery. Has any had this problem ? Do I have a battery problem?
 
Sounds like battery problem.
 
lewiv said:
My 72v 50a 3000w-5000w motor will not run. It will run with charger connected but, unplug the charger and it will not run. When plugged in the display shows 100% battery charge. Unplug the charger and it shows 0% battery. Has any had this problem ? Do I have a battery problem?

There's enough voltage to run the display, so what is the battery voltage measured directly from the discharge conductors?
 
It's almost certainly either a battery problem, or a controller LVC problem.

Did the system ever work correctly, or is this a new problem?

If it's a new problem, when did it start and under what conditions?

If it's not a new problem and has never worked, what specific battery is being used, and what specific charger is being used?


lewiv said:
My 72v 50a 3000w-5000w motor will not run. It will run with charger connected but, unplug the charger and it will not run. When plugged in the display shows 100% battery charge. Unplug the charger and it shows 0% battery. Has any had this problem ? Do I have a battery problem?
 
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