This article explains what load management is and how to choose between Dynamic Load Management (DLM) and Static Load Management (SLM) for your EVCI installation.
What is load management?
Load management controls the charging power of EV charging stations (EVCS) at a site. It distributes available power across all connected EVCS while keeping total consumption within configured grid import limits.
Load management is the foundation for all other eMobility features in the gridX Energy Management System (EMS). All other features — such as peak shaving and clustering — build on top of it.
Two variants are available:
Dynamic Load Management (DLM) — uses a real-time grid meter at the Grid Connection Point (GCP) to react to both controllable and uncontrollable loads
Static Load Management (SLM) — uses a fixed power limit without a grid meter, based on aggregated EVCS power measurements
How do I choose between DLM and SLM?
Choose based on whether a grid meter is installed at the GCP.
Use DLM when:
A grid meter is installed at the GCP
The site has significant uncontrollable load (building consumption, HVAC, etc.)
Precise fuse protection is required
The site requires advanced features such as DSO signaling or battery optimization
Use SLM when:
No grid meter is available
Uncontrollable load is minimal or predictable
Choose between static and dynamic load management in the XENON Dashboard under the system's product settings.
The configuration of a grid meter takes pecedence over the product configuration in the XENON Dashboard. If SLM is configured but a grid meter is present, the system may behave as a DLM system. Always verify that the product setting matches the actual hardware setup.
What are the hardware requirements for load management?
EVCS with controllable charging power and power or current measurements
EVCS measurements available at least every 5 seconds
gridBox with internet connection (minimum 10 Mbit/s)
What are the general EV charging technical requirements?
All load management variants depend on the following EV charging behavior:
Minimum charging power
Most EVs require a minimum of 6 A per phase to charge
Some EVs require 8 A or 10 A per phase
Phase detection
The EMS has no phase information before the EV plugs in
At plug-in, a brief full-power charge runs to detect the number of phases the EV supports
Zero-power lock
Zero-power locks are only configured for some EVCS models
When the EMS reduces an EV to zero power, it remains at zero for at least 8 minutes
This prevents excessive on/off cycling on EVs
How do I enable load management?
The Energy Management System (EMS) is disabled by default for all new systems.
In XENON, go to the System Details tab for the site
Select the appropriate product type (Dynamic or Static)
Configure all grid connection parameters (maximum power, safety margin, fallback)
Verify phase rotation and cluster configuration are correct
Activate the Energy Management Control toggle
What are the limitations of load management?
The EMS controls charging power indirectly by sending setpoints to each EVCS — it does not communicate with EVs directly, and cannot guarantee that an EV will follow the setpoints it receives