OCPP charging site simulator

A car park seen from above. Click a charger to name it and set its power, switch the site on, and watch the cars drive in, charge and leave — every OCPP message going to a real server.

▶ Watch it in two minutes: cars, load balancing and the main breaker tripping

From a browser the chargers connect without a password (browsers can't send Basic Auth). No CSMS? Use the free askacharge.com test server ·
Click a charger to name it and set its power · click an empty bay to send a car · click a car to make it leave.
From the grid
0 kW
■ chargers · ■ with the building · ┄ grid connection · 10 min
More settings
OCPP messages

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Charger

Changing it while the site is on reconnects only this charger.

LGA and main board

A local balancer measures the LGA and caps the chargers itself, without OCPP: what the building leaves free, minus the margin. Each car gets at least its minimum (6 A) in order of arrival while it fits, the rest is shared equally; the ones that don't fit wait. The CSMS's Smart Charging profiles still apply on top: the lower limit wins.