Static caps are simpler but less responsive to building demand.
AETREN · LOAD MANAGEMENT
EV charging load management explained for developers and fleets.
Load management is the control layer that decides how a limited site power budget is shared across chargers and vehicles.
SHORT ANSWER
Managed charging is useful when energy can move in time without breaking the operating requirement.
Use load management where vehicles have flexible dwell, staged departure times or variable charging priority. It is less useful when every vehicle requires high power simultaneously to meet a fixed turnaround deadline.
KEY PROJECT POINTS
What should drive the decision.
These are project inputs, not substitute engineering or automatic product approvals.
Dynamic systems can follow measured site load.
Fleet priority rules can protect vehicles with earlier departure.
Backend/cloud control and local control have different resilience implications.
OCPP support does not automatically prove every load-management feature.
Failover behaviour should be specified if communications are lost.
COMPARISON
Use-case fit before product preference.
The table is deliberately directional. Exact configurations still require project and evidence review.
| Pathway | Best fit | Watch closely |
|---|---|---|
| Static site cap | Predictable sites where EV charging can be limited to a fixed kW ceiling. | Unused capacity when other building loads fall. |
| Dynamic load management | Sites where building load varies and EV charging should use available headroom. | Metering/control integration, response logic and communication resilience. |
| Fleet-priority scheduling | Depots with known departure times, routes and vehicle criticality. | Backend rules, data quality and exception handling. |
Decide what is being controlled
The control target may be whole-site EV load, one distribution board, a charger cluster, fleet priority or tariff periods.
Specify the measurement source
Dynamic systems need trustworthy real-time site/load data and clearly defined integration responsibility.
Define failover
Projects should state what chargers do if the backend, meter or communications fail—continue at a safe cap, pause, or fall back to a local profile.
Keep product evidence exact
Supported OCPP version, local controller capability and certified profiles should be checked against the exact charger/backend pairing.
PROJECT INPUTS
What to have ready before asking for the exact system.
A stronger brief shortens the gap between product interest and a useful technical/commercial response.
Site demand limit
Measurement point
Charger groups
Vehicle priority
Departure deadlines
Tariff periods
Backend/OCPP requirement
Local vs cloud control
Communications resilience
Failover behaviour
Growth plan
Operator reporting needs
EVIDENCE BOUNDARY
OCPP is an interoperability framework, not a guarantee of every project control function.
Confirm exact charger/backend OCPP version, supported profiles, local controller functions, metering interfaces and failover behaviour from verified documentation or testing.
FAQ
Questions project teams usually need answered.
What is dynamic load management?
It changes charger power in response to a measured site or feeder limit rather than holding EV charging at one fixed cap.
Does OCPP automatically provide load management?
No. OCPP enables communication, but exact smart-charging functionality depends on charger/backend support and configuration.
Can fleet vehicles be prioritised?
Yes where the chosen control architecture supports scheduling or priority logic and the operational data is available.