What is the difference between static and dynamic load management?
The facility manager compares two settings in the system. The old one gave every charge point 4 kW, always.
The new one measures the building at the connection and gives the chargers whatever is left.
The questionWhat is the difference, and why does it matter at 8:45 AM?
- Fixed limitset once
- Per point80 kW ÷ 20 = 4 kW
- Alwayseven if only one car charges
- Meterat the connection
- Controllercomputes the room
- Chargersget new limits
- Carsfollow within seconds
Dynamic load management needs a measurement at the connection and a controller, in the charger, on site or in the backend.
A composed example. Static load management must assume the building's peak all day; dynamic load management uses the room between the building and the connection at every moment.
When static is enough
Static needs no meter and no communication between chargers. It suits small sites, a few charge points behind a connection with plenty of room. As soon as many cars share a tight connection, the fixed shares waste power: at 4 kW per point, one car alone in the evening still gets only 4 kW.
Check your understanding
3 questions. Answer all of them to complete this stop. Each answer explains itself.
What does dynamic load management need that static does not?
It has to know how much the building uses right now, and someone has to turn that into limits for the chargers.
Why does static load management waste power?
One car alone still gets only its fixed share, while the rest of the capacity stays unused.
At midday the building uses 104 kW of a 200 kW connection. How much room is left for charging?
200 kW minus 104 kW leaves 96 kW. A dynamic system can give it all to the chargers.
- Load management Shares a site's grid connection between the cars charging at the same time. EV charging fundamentals, stop 04 Glossary