We created a system that take cares of the EV-charger usage. Many property owners would like to bill for the usage of the EV-chargers naturally they do not want a coin/token system. We created a system that connects the charger tag access control with the billing. The system collects all the data and once per month sending the correct usage to the property billing system. Doing usage billing frees up the chargers and prohibits free loaders. This due to the fact that you do not want to have your car parked at the slot for longer than the actual usage.