Sinexcel in combination with a Poweroad BMS Starting from Sofar EMS software version 1.17.0.x, you must add the Sinexcel inverter and Poweroad BMS as separate devices, and dc-link them through the groups page. For more information, see: DC-linking inverters, batteries and BMS systems
| Device Type | Modbus TCP (Ethernet) | RS485 | Curtailment | Reactive power control |
|---|---|---|---|---|
| Sinexcel | ✅ | ❌ | ✅ | — |
| Isuna | ❌ | ✅ | ❌ |
For correct ethernet wiring: Follow the the guidelines for ethernet wiring.
The external control of the inverter for modbus TCP communication has to be activated in the configuration screen of the inverter.
On the touchscreen of the inverter:
On the touchscreen of the inverter:
In case the mode is already on "Remote control", but the battery does not respond, put the mode first on "Local Manual" and then select again "Remote control" to reactivate the remote control function.
This step is not optional. Without "Remote control" the inverter keeps running its own self-consumption mode and ignores the controller's battery commands. The device then shows a "remote control disabled" error in the EMS.
The EMS controls the battery of an Isuna through its charge/discharge setpoint only. It cannot limit the solar production or the export of the Isuna. If the site needs an export limit, set the anti-backflow / zero-export function in the settings of the inverter itself.
An Isuna always shows two battery inputs, even when only one battery pack is connected. This is not a detection error: the inverter splits the battery power over two sets of registers, so both inputs carry real power. Both inputs are controlled through one shared command, and the EMS adds up what it plans for each input.
Configure them as follows:
| Setting | Value |
|---|---|
| Add both inputs | Yes |
| Nominal power | The power of the battery pack divided by 2, on each input |
| Capacity | The capacity of the battery pack divided by 2, on each input |
| Control | Leave both inputs controlled |
Example: a pack of 10 kW / 15 kWh becomes two inputs of 5 kW / 7.5 kWh each.
Common mistakes