NotifyChargingLimitRequest (OCPP)
An OCPP message used by a charging station (or local controller) to inform the CSMS that the active charging limit changed due to an external source (e.g., EMS, smart meter, DSO signal).
Technical Details
When external controls impose or update a charging limit (for example setting a limit to 0 to delay charging), the station can report this change to the CSMS via NotifyChargingLimitRequest. This supports topologies where power control is shared between CSMS scheduling and local/external constraints.
Fleet Applications
Reduces surprises in depot KPIs and operations: charging power changes are explainable and auditable, helping planners avoid missed departures and enabling faster incident resolution.
Related Terms
Smart Charging
Intelligent management of EV charging sessions to optimize energy consumption based on grid constraints, energy prices, and vehicle schedule requirements.
OCPP 2.1
OCPP 2.1 is a newer OCPP release that extends the protocol ecosystem with clearer architecture guidance and energy-management integration patterns for smart charging deployments.
ChargingStationExternalConstraints (OCPP)
An OCPP charging-profile purpose used to represent charging limits imposed by external actors like an Energy Management System (EMS) or a smart meter.
Local Controller (OCPP)
An on-site component that can sit between charging stations and a CSMS to perform local scheduling and load balancing, often used when integrating an EMS at a site.
EMS as Man-in-the-Middle (OCPP)
An energy-management topology where EMS and local-controller functionality are combined and placed between the CSMS and charging stations.
CSMS (Charging Station Management System)
Software platform used to monitor, manage, and optimize a network of EV charging stations.