How to do Load balancing on multiple EV Box stations (Hub-satellite)

EV Box controls multiple EV Box stations in a charging park using the Hub-satellite solution.

Smappee can communicate the Maximum allowed current to the Hub-satellite which then spreads this over the stations connected to the Hub.


The following logic is used to spread the charging:

For each transaction (combination of car and connector) a minimum current where the car will charge is established, once that is done (first couple of minutes) the car is offered the lesser of the  maximum the connector can offer and the maximum current divided by number of transactions. As more cars are added and the max/transactions gets lower and lower, the minimum transaction current may be reached for some cars and so then we enter a smart charging cycle where every 15 minutes, the cars that are charging are rotated.