Work out ev charger requirement instantly with clear inputs, formula shown and shareable results.
Charge point provision is set as a percentage of parking spaces, and the electrical consequence is what matters. Connected load is the count times the rated power, but a diversity factor of 0.5-0.7 reflects that not every point draws full power at once, particularly with load management. That diversified figure sizes the supply.
Charge points
Count = ceil(total spaces x EV percentage)
Electrical load
Connected kW = count x rated power; design load = connected x diversity factor
Preliminary estimate only. Electrical supply capacity, protection and metering for EV charging must be designed by a qualified electrical engineer to the wiring regulations in force.
Count = ceil(total spaces x EV percentage). Charge point provision is set as a percentage of parking spaces, and the electrical consequence is what matters.
Substantially. Dynamic load balancing across a car park can allow twice as many points on the same supply by sharing capacity, at the cost of slower charging at peak times.
This calculator takes 4 inputs: Total parking spaces, Share to be EV enabled, Power per charge point, Diversity factor. The pre-filled defaults are a realistic worked example — replace them with your own site or project figures.