EVShop.eu offer in Europe for electric vehicle conversions various motor controllers. AC controllers offer superior performance with effective and straightforward regenerative braking when matched with AC motors. On an EV electric vehicle the controller is equivalent to the fuel injection metering system or carburettor on an internal combustion engine. The controller regulates the amount of electrical power the motor can draw from the batteries. Modern controllers make use of solid-state power electronics to achieve smooth variable speed operation of the driven motor.