# Solis

> Supported devices: S6-EH3P30K-H, S6-EH3P40K-H, S6-EH3P49K-H, S6-EH3P50K-H

Source: https://voltmasters.io/en/docs/device-integrations/battery-systems/solis/

Our EMS supports the hybrid energy storage inverters from Solis (Ginlong).

The S6 energy storage inverters combine PV and battery in a single unit. The inverter talks to the battery over CAN and exposes both on one register map, so our EMS manages the inverter as a hybrid inverter with its battery management system attached.

### Supported devices

-   **S6-EH3P30K-H**: 30 kW hybrid energy storage inverter
-   **S6-EH3P40K-H**: 40 kW hybrid energy storage inverter
-   **S6-EH3P49K-H**: 49 kW hybrid energy storage inverter
-   **S6-EH3P50K-H**: 50 kW hybrid energy storage inverter

The inverter is reached over **Modbus TCP** through a Solis datalogger (for example the S2-WL-ST), which acts as the gateway to the inverter's RS485 interface. The **battery capacity is entered during device setup**, it is not read from the inverter, so make sure it is configured correctly.

> **Warning**
>
> Configure the inverter for remote control before you add it: set it to self-use mode and allow charging from the grid. Without that, the inverter ignores the setpoints our EMS sends.

> **Note**
>
> Our EMS uses the volatile remote control registers of the inverter and refreshes them continuously. The stored storage mode and time-of-use schedules are never overwritten, so the settings you configured on the inverter stay intact.

### PV on the MPPT inputs

The solar field on the MPPT inputs of the inverter appears **automatically as a separate PV device** under the hybrid inverter, with its own production and yield, so you can read the solar side apart from the battery side.

> **Note**
>
> This requires **EMS controller version 0.0.328 or later**. On an older controller the solar production is only part of the readings of the hybrid inverter itself.

Two things are worth knowing about this PV device:

-   **Enter the PV capacity** on the device. It is not read from the inverter, and without it the EMS cannot size the production; a warning is raised until it is filled in.
-   **The PV cannot be curtailed.** The remote dispatch version found in the field has no proportional PV power limit, so this PV device is monitored but not steered. If the control strategy asks for a limit on it, the EMS reports that the firmware cannot apply it rather than silently recording the limit as applied.

> **Note**
>
> Curtailment of the installation as a whole is still possible: the EMS charges the battery with the surplus and, where a grid limit applies, keeps injection within it. Only the PV inverter's own output cannot be capped.

### EMS functionality

With the current integration, our EMS enables:

-   Monitoring of battery status and performance
-   Monitoring of the solar production on the inverter's MPPT inputs, as a separate PV device
-   Smart charging and discharging control
-   Optimization of self-consumption
-   Peak shaving and load balancing

Additional functionality may be added over time as integration capabilities evolve.

### Alarms specific to this inverter

| Alarm | Meaning |
| --- | --- |
| Inverter does not accept remote control | The inverter is not in a mode that accepts the EMS setpoints. Check the remote control configuration above. |
| No PV capacity configured for the hybrid inverter | Fill in the capacity on the PV device. |
| PV curtailment is not supported by this inverter firmware | A PV limit was requested but the firmware has no register for it. |
| Aggregate battery power is unavailable, only one battery port is measured | Older firmware without the total battery power register. On a dual-port model the reported battery power then understates the total. |
| PV and battery power mismatch | The solar and battery readings do not add up, which usually points at a metering or configuration problem. |
| AC coupling is locked or suspended | The inverter has taken its AC coupling out of service. |
| Generator failed to start or stop, generator voltage or phase abnormal | For installations with a generator on the inverter. |
| Communication with a grid-tied inverter failed | The hybrid lost a grid-tied inverter behind it. |
| Master and slave software versions are incompatible | The inverter's own firmware versions do not match. Have them aligned. |