EV charging garage simulator
Draw your garage, place the main board, the chargers and the cables, and switch it on: cars drive in through the entrance, charge and leave, and you see live how much current each phase carries, how far the voltage drops and which breaker trips. Every charger really speaks OCPP 1.6J with a real server.
▶ Watch it in two minutes: cars, load balancing and the main breaker tripping
More settings
OCPP messages
Got a real site to run?
askacharge.com shares the power of a site between its chargers over standard OCPP, with your tariffs and your payments, and no ties to any manufacturer. Try it free for 30 days, no card.
Start your 30-day free trialWhat you can do
- Draw the garage to scale: the outline stretch by stretch with its measurements, the rows of bays, the entrance, the main board and every charger where it goes.
- Lay out the cables from the main board, with their breaker and cross-section, and see the voltage drop to the farthest charger (with the 5 % limit used in Spain's ITC-BT-52; check your local rules).
- See the current on each phase of every cable while cars charge: with single-phase chargers you see at once whether the phases end up unbalanced, and you can change each charger's phase.
- Test load balancing: a local load balancer shares the grid connection between the cars without going over any cable's breaker. Without it, you see when the main breaker or a cable trips.
- Use real chargers: each one connects over OCPP 1.6J to the free askacharge.com test server or to your own platform, and follows charging profiles like a real charger.
- Save the plan to a file and load it again another day.
Who it is for
Installers, to see before quoting how many chargers fit on one supply and which cross-section each cable needs. Property managers and condo boards, to show residents how the garage's power is shared. Operators, to test their platform's load balancing with a whole car park without touching a charger.
What it is not
It is a simulator. The electrical calculation is approximate (copper, cos φ = 1, each charger at its point on the cable) and does not replace a proper design or an electrical calculation tool. Car charging curves and the building's load are simplified. What is real is OCPP: the messages are those of a real charger.
Just want to try one charger? Use the virtual charger. A car park without drawing it? The classic charging site simulator.