Can a 72V motor work with a higher voltage?

The motor will also still work with higher voltage, but will need to reduce the current in line with the rated power to not cause it to over heat. Limit to 24A ideally to be safe. Fully charged 72V is actually higher than 72V.

Should I use a 72 volt controller with a 40 watt motor?

Battery voltage limits max amperage, so 72V will deliver a higher potential maximum. Your controller, however, is designed to control amperage - that's its function, and again, to a maximum. Also the C-rate of the battery can limit amperage and its better to higher C-rate. For a 2000 watt motor, I'd go with a 40 amp controller and a 72V battery.

How much power does a 72V controller use?

If you have a controller rated at 72V@20 A then your max to motor is about 1440 W. If your controller is 72V@40A then the power to the motor is 2880W. This also depends on your battery C rating , voltage sag under WOT. Running at 72V will give you a higher top speed . Its the amps running through the motor that will deliver higher performance.

Are battery and controller compatible at 72V?

If you have to ask yes Battery and controller should be compatible at 72v even your motor is 60v. Heat will occur on uphills so dont try to climb with these setup. 158K subscribers in the ebikes community.

Can a 60v battery be overcharged?

Either way, you really have to keep any eye on your voltages during running, as the low voltage cutoff will be wrong, and you can over discharge your battery. A 60v lead acid battery will be around 72v when fully charged, so the controller has to be made for at least this much. Usually there is a little headroom in the ratings also.

Is 72V faster than 60V?

72V would be faster than 60V. Voltage doesn't make a motor run hotter, watts do. A larger ah battery would be less stressed than a smaller ah one of the same chemistry. The more wattage you try and run through a controller the hotter it will get. VA=w. "How would 72v @ 15ah be different?" Different than what?