Dynamic Load Balancing
Dynamic load balancing is charging control that adjusts the power available to electric vehicles as the site's other electrical demand changes.
How it works
A meter or energy-management system measures or estimates the building's current non-EV load. The controller then changes the EV charging budget so that the combined demand remains within a configured site or connection limit. If building demand rises, charging power can be reduced; when capacity becomes available, it can increase again.
The available charging budget may be divided equally, assigned by priority, or optimized using information such as required energy and departure time. Actual performance is constrained by the EVSE, vehicle onboard charger, phase arrangement, minimum usable current, metering delay, and control response time.
Important boundary
Dynamic load balancing is more specific than fixed power sharing. Fixed sharing divides a predetermined EV charging limit among active connectors but does not necessarily react to changing demand elsewhere in the building.
It is also a local capacity-control function, not proof of participation in a utility demand-response or grid-services program. Communication failure should lead to a defined safe fallback limit.
For the wider control architecture and grid boundary, see Smart Charging and Grid Integration.