Easee chargers: communication and compatibility
When multiple Easee chargers share the same circuit, they communicate locally and share the available charging power. This article explains their roles, which models can operate together and what to do if the local connection is interrupted.
01How the chargers communicate
Primary charger (Master)
Coordinates local communication and distributes the available charging power within the circuit.
Secondary chargers (Secondary Units)
Receive their available charging power from the primary charger on the same circuit.
Easee Link: local connection
The chargers communicate over radio. A shared local WiFi network can provide an additional, redundant communication path.
Cloud: separate online connection
WiFi or LTE-M connects the installation to Easee Cloud. A loss of internet connection therefore does not automatically interrupt Easee Link.
02SDU and MDU: site type or product group?
SDU or MDU site
Describes how a site is organised in Easee. SDU (Single Dwelling Unit) typically refers to a smaller private site; MDU (Multi Dwelling Unit) to a larger shared or commercial site.
SDU or MDU product
Determined by the charger model. The product group defines the communication architecture used by the charger and which other models it can communicate with on the same circuit.
Site type and product group are independent of each other. An SDU product can be installed at an MDU site – and vice versa. Compatibility is always determined by the charger model.
03Which products are compatible?
SDU and MDU products are not compatible with each otherUse only models from the same product group within a circuit.
| Comparison | SDU product group | MDU product group |
|---|---|---|
| Current models | Charge Up Charge Max |
Charge Core Charge Pro |
| Legacy model | Easee Home | Easee Charge |
| Market-specific | Easee One | – |
| Per circuit | Up to 3 | Up to 101 |
| Role allocation | 1 primary charger (Master) up to 2 secondary chargers (Secondary Units) |
1 primary charger (Master) up to 100 secondary chargers (Secondary Units) |
| Compatible with | SDU products | MDU products |
| Not compatible with | MDU products | SDU products |
Easee One technically belongs to the SDU product group, but is market-specific and not available in all markets. An MID or Eichrecht version of Charge Max or Charge Pro does not change its product group.
Why can’t SDU and MDU products be combined? The product groups use different communication architectures. They therefore cannot form one common load-balancing group.
An Equalizer does not change the product group. The maximum numbers apply per circuit; a site can contain multiple circuits.
Not sure which model you have? The serial number identifies the charger.
Find the charger’s serial number →
Planning or expanding an installation? Check the product group and maximum number of chargers per circuit first.
Plan an installation with multiple chargers →
04Check the LED status when a charger does not charge
The white LEDs help you confirm whether the role allocation is normal or a secondary charger has lost the local connection.
| LED status | What it means | Next step |
|---|---|---|
| One solid white LED | Secondary charger: in standby and ready to operate | No action is required for the local connection |
| Two solid white LEDs | Primary charger: in standby and ready to operate | No action is required for the local connection |
| First LED flashes white | The secondary charger has lost the local radio connection to the primary charger. | Restore the connection using the steps below |
Restore the local connection
- Check that the primary charger is powered on and shows a normal LED status.
- Restart the primary charger first.
- Once it has started, restart the affected secondary charger.
- Wait a few minutes and check the light strip again.
Still unable to restore the connection?
Contact Easee Support if the first LED on the secondary charger continues to flash white after both chargers have been restarted. Have the serial number of the affected charger or the site key, and a short description of the issue ready.
Can’t find the serial number? Find it here →