How the fleet calculator works

Pick the vehicle, how full it arrives, how full it needs to leave, the chargers, and how you run the lot. The calculator follows a realistic charging curve to work out how long each vehicle takes, adds the time to swap vehicles, and counts how many each port can finish inside your charging window. Then it checks whether the people moving cars can keep up, and names whichever runs out first.

Why it stops at 80%

DC charging slows down hard near the top. In the model, power holds to 50%, eases to about two-thirds of peak by 80%, then falls steeply. Charging to 100% instead of 80% can nearly double the time per car. The results show exactly what that costs your depot in vehicles per port per day.

What it assumes

• One vehicle per port at a time.
• A site power limit, if you set one, is shared evenly across the ports.
• A failed start costs another swap, so a lower success rate stretches every cycle.
• Each porter moves one vehicle per swap. Too few porters and the chargers sit idle waiting for cars.

Questions people ask

How many chargers does my fleet need?

Take the vehicles that need a charge each day, divide by what one port can finish in your window, and round up. Then check site power and staffing, because in most depots one of those runs out before the chargers do. The calculator does the whole sum and tells you which one it was.

Level 2 or DC fast for a fleet?

If vehicles sit for eight hours or more, Level 2 usually does the job for far less money. DC fast earns its keep when vehicles turn around during the day, or the lot doesn't have room for a charger per vehicle. The calculator compares both for the same fleet, so you can see how many of each you would need.

What is a good success rate?

As close to 100% as you can get, because every failure costs a swap and a person's time. The fleet guide covers compatibility testing and the operational habits that keep it there.