Voltage

EV systems come in a variety of voltages, some of the most common being 48, 100, 400, and 800 volts.  Voltage is sometimes compared to water pressure; the higher the pressure, the greater volume of water can go through a given size of hose. With electrical systems, the equivalent of hoses are the cables, bus bars, contactors, interconnects, etc. and these all have to be larger to handle lower voltage. Although a low voltage system (e.g. 100V) may be less expensive and somewhat safer to work with, its usefulness is limited to low-power applications.  Power = voltage X current (amps), and since high current is harder to achieve, higher voltage is a much more practical way to achieve higher power.

Every motor and inverter system has a rated voltage with a tolerance range ideal for adequate performance. While the motor may be able to run at a lower voltage, it will not be able to achieve its rated power level. Too high voltage can destroy the system. Battery options with a high degree of voltage flexibility increase the options for motor and inverter systems.

EVDrive battery modules use small cells (21700), making it possible to offer a wide variety of cell group configurations and resulting voltages without changing the module design. In addition, each of the six standard EVDrive module designs have their own cell arrangement and capacity. This means that with EVDrive batteries you are much more likely to get your desired combination of capacity (kWh), voltage, and dimensions.