OpenEMS Modbus-API
Hybrid inverter (PV + battery) by OpenEMS. Compatibility with energy supplier apps, Home Assistant and evcc.
At a glance
| Device type | Hybrid inverter (PV + battery) [evcc template, 2026-10-19] |
|---|---|
| evcc support | Yes |
| Connection | Modbus TCP (inferred from evcc template parameters) [evcc template, 2026-10-19] |
| Local control (no cloud) | Yes via evcc's connection type [evcc template, 2026-10-19] |
| Home Assistant | Unknown know this? tell us (brand not yet checked) |
| Known firmware notes | Unknown know this? tell us |
Energy supplier apps
Supplier lists are published per brand (sometimes with model conditions). A brand match does not guarantee your exact model works — check the linked page or the supplier's app.
| Supplier / service | Status for OpenEMS hybrid inverter | Source |
|---|---|---|
| Frank Energie | Not listed OpenEMS is not on Frank Energie's battery / inverter list | [source, 2026-10-19] |
| Tibber | Not listed OpenEMS is not on Tibber's battery / inverter list | [source, 2026-10-19] |
| Zonneplan | Not listed Zonneplan only lists its own hardware | [source, 2026-10-19] |
| Eneco | Unknown know this? tell us | — |
| ANWB Energie | Unknown know this? tell us | — |
| Vattenfall | Unknown know this? tell us | — |
Home Assistant integrations for OpenEMS
Unknown know this? tell us — we have not yet checked Home Assistant support for OpenEMS.
evcc details
| Template | openems-modbus (meter; usages: grid, pv, battery) [source, 2026-10-19] |
|---|---|
| Connection | Modbus TCP (inferred) |
| Capabilities | battery-control [source, 2026-10-19] |
| Requirements | ##### License notice:
For active battery control on FENECON FEMS systems, a commercial license (*FEMS App Modbus/TCP Write Access*) is required.
##### FEMS documentation:
- FEMS App Modbus/TCP Read Access: [docs.fenecon.de](https://docs.fenecon.de/en/fems/fems-app/App_ModbusTCP_Lesezugriff.html)
- FEMS App Modbus/TCP Write Access: [docs.fenecon.de](https://docs.fenecon.de/en/fems/fems-app/App_ModbusTCP_Schreibzugriff.html)
##### OpenEMS documentation:
- OpenEMS Edge Api Modbus Controller: [openems.github.io](https://openems.github.io/openems.io/openems/latest/edge/controller.d/io.openems.edge.controller.api.modbus.html) [source, 2026-10-19] |
| Known caveats | None listed in the evcc template. |
“Works for me” reports
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