Solar DLM
1. Intro
Solar DLM is an extension of the DLM algorithm specifically developed for charging stations in combination with PV systems. Individual charging points or networks of charging points (DLM networks) can be connected to PV systems, allowing the generated solar power to be used for charging. An external energy management system is not required for the application.
2. Requirements
Make sure that:
- you have a basic DLM setup in place
- you have read the previous article about DLM
Infrastructure:
- installed PV system
- external meter (that measures the positive energy production of the PV system) placed behind the PV system's inverter or at the grid connection point
3. How it works
- The algorithm will assign the PV energy production first to all (if any) non-solar connectors and distribute the remaining energy to the solar-mode-enabled connectors. This concept will prevent solar chargers from charging with electricity from the public grid.
- Solar-mode-enabled connectors will receive energy based on the first come first serve principle.
- Non-solar connectors in the DLM will charge electric vehicles with energy from PV system or from the grid, depending on PV production.
- The algorithm assumes the use of a balancing grid meter and will distribute the current independendly from the phase of production and consumption.
4. Configuration
- Log in to the Configuration Interface using the Operator Login Credentials
-
Apply the following configuration:
Settings for the DLM Master
| Parameter | Location | Value | Info |
|---|---|---|---|
Configure Solar Mode for DLM | LOAD MANAGEMENT > Dynamic Load Management | Only Solar Charging | Whether this DLM master allows special handling of DLM slaves that want to use solar energy. |
Settings for the DLM Slave
| Parameter | Location | Value | Info |
|---|---|---|---|
Solar Mode on this charger | LOAD MANAGEMENT > Dynamic Load Management | On. | Enables additional limiting for this DLM slave to use renewable production |
- At the bottom of the Configuration Interface, click , then click to apply the changes
5. Limitations
In the mode 3 system, a charging station must provide 6A or more when charging. EVs with 3-phase-chargers will therefore need to receive at least 4,2 kW of power. In case the PV system provides less power, charging will be paused. Customers with a smaller PV system may chose a 1 phase charging cable to charge with a minimum of 1.4 kW.