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The number of lithium ion cells that can be used with our systems is limited by the Curtis controller. The controllers can only handle a certain amount of voltage and if the voltage exceeds that limit, the controller will go into a cutback situation. With that being said, the amount of lithium ion cells that can be used with the different controllers we sell are: 72 volt systems: 28 cells maximum 96 volts systems: 36 cells maximum 144 volt systems: 48 cells maximum

An EV (electric vehicle) is a motor vehicle propelled exclusively by electricity. While generally used in reference to electric powered automobiles, a great many non-road going vehicles including forklifts, burden carriers, and golf carts are electric powered. As an extreme example even the Lunar Rover used by the astronauts on the moon would be considered an EV.

Regen is short for regenerative braking. This basically is a system by which the energy of a decelerating EV is harnessed, either by using the drive motor as a generator, or by driving a separate generator. The electricity created by this process is fed back into the drive battery pack, restoring some of the charge. Regenerative braking seldom has a significant effect on overall range, but it does improve driveability, and reduces brake wear. Most AC drive electric vehicles include this feature, but it is only rarely found on DC drive EV's.

We recommend using the GIGAVAC brand of contactors. Our standard systems that utilize an 48 VDC coil uses GIGAVAC part number GV200QA-1. Systems that we sell that utilize the "1239E" controllers will use an 12 VDC coil uses GIGAVAC part number GV200PA-1.

You can find information on this website about what the flashing LED lights on the controller mean. Follow this HPEVS Troubleshooting Link to the pages containing information on how to read the flashing LED's and the corresponding error codes.