4QD 30 Reach Road Burwell Cambridgeshire CB5 0AH United Kingdom Phone. 4QD manufactures speed controllers and hand grip throttles for battery operated electric motors ranging from 12 volts and up. Great for small EV projects. Motor Page The Motor Page lets you input motor curves and calculates values required by the EV calculator. The Battery Page lets you input battery data and calculate values required by the EV calculator.
Emphasis is on quality components, reliability, and safety.
Free Technical papers Electro Automotive Shari Prange and Mike Brown Phone. EV parts dealer, converter, EV service, free used EV list on website. Sales agent for Zivan chargers. AC and DC components. Small vehicles including the City-El.