FoxESS · Solar inverter
H3 series hybrid Modbus register map
Default configuration
- Protocol
- Modbus TCP
- Port
- 502
- Unit ID
- 247
- Addressing
- 0-based
- Byte order
- Big endian
- Word order
- High word first
Register map
| Address | Count | Name | Type | Unit | Scale | Access |
|---|---|---|---|---|---|---|
| 31002 | 1 | PV1 power | Int16 | W | 1 | R |
| 31005 | 1 | PV2 power | Int16 | W | 1 | R |
| 31026 | 1 | Meter power R Signed; positive means export. | Int16 | W | 1 | R |
| 31027 | 1 | Meter power S Signed; positive means export. | Int16 | W | 1 | R |
| 31028 | 1 | Meter power T Signed; positive means export. | Int16 | W | 1 | R |
| 31036 | 1 | Battery charge/discharge power Signed; positive means discharging. | Int16 | W | 1 | R |
| 31038 | 1 | Battery state of charge | Int16 | % | 1 | R |
| 32012 | 2 | Grid consumption total | UInt32 | kWh | 0.1 | R |
| 41000 | 1 | Work mode 0 = self use, 1 = feed-in first, 2 = backup. | UInt16 | - | 1 | RW |
| 41009 | 1 | Minimum state of charge | UInt16 | % | 1 | RW |
| 41010 | 1 | Maximum state of charge | UInt16 | % | 1 | RW |
| 44000 | 1 | Remote control enable 0 = disabled, 1 = enabled. | UInt16 | - | 1 | RW |
| 44001 | 1 | Remote control timeout Seconds after the last write before the inverter reverts to the work mode. | UInt16 | s | 1 | RW |
| 44002 | 2 | Remote active power setpoint Signed; negative values charge the battery. | Int32 | W | 1 | RW |
Notes
Register map from the evcc template https://raw.githubusercontent.com/evcc-io/evcc/master/templates/definition/meter/fox-ess-h3.yaml, cross-checked against nathanmarlor/foxess_modbus (inverter profiles for the H3 series). Reached through the FoxESS LAN/WiFi dongle as Modbus TCP on port 502 with unit ID 247; the same map is served over RS-485 on the inverter's RS-485 port. All entries are holding registers. Meter power is signed per phase, positive = export. Remote control (0xABE0-0xABE2) requires the remote-control enable register; the inverter falls back to the work mode when the remote timeout expires. Battery compatibility: Fox ESS pairs its hybrid inverters with its own high-voltage battery range - the HV2600 module stack (https://en.fox-ess.com/hv-batteries/) and the EP packs (https://www.fox-ess.com/products/battery) - though the cited pages do not state the pairing for this model explicitly. Mind the name: Fox ESS also sells a battery line called H3, so 'H3' on their site can mean the battery, while this seed is the H3 hybrid inverter.