--- title: "EPever IP-Plus Inverter" description: "EPever IPower-Plus pure sine wave off-grid inverter with Modbus RTU (RS-485) integration." url: "https://taphome.com/en/compatibility/epever-ip-plus/" language: en lastmod: 2026-03-27 generator: hugo ai: topics: ["modbus-rtu","inverter","rs485","off-grid","pure-sine-wave","battery"] questions: ["How to integrate EPever IP-Plus inverter with TapHome?","What does the EPever IP-Plus TapHome template monitor and control?","How to connect EPever IP-Plus via RS-485 to TapHome?","What is the default Modbus slave ID for EPever IP-Plus?","How to enable remote control on EPever IP-Plus via Modbus?","How to adjust battery voltage protection thresholds on EPever IP-Plus?"] --- # EPever IP-Plus Inverter Communication: Modbus RTU - [EPever Official Website](https://www.epever.com) ## Integration guide The EPever IPower-Plus is a pure sine wave off-grid inverter available in models from 350 W to 5000 W. It communicates with TapHome via Modbus RTU over an RS-485 connection using an RJ45 connector. The TapHome template provides AC load power monitoring and inverter on/off control, along with configurable battery voltage/current protection thresholds and AC output settings. The template covers the entire IP-Plus series — all models from IP350-Plus through IP5000-Plus share the same Modbus register map. > [!WARNING] > The IP-Plus is strictly an **off-grid inverter**. It must never be connected to the mains grid. Only stand-alone operation is permitted — parallel or series connection of multiple units is not supported. ## Hardware connection ### RS-485 via RJ45 The inverter uses an **RJ45 connector** for RS-485 communication. Connect to TapHome using a standard Ethernet cable with the following pin assignment: | RJ45 Pin | Function | Connect to TapHome | |----------|----------|-------------------| | 1, 2 | +5 V DC (200 mA) | Not used | | 3, 4 | RS485-B | B-/D- | | 5, 6 | RS485-A | A+/D+ | | 7, 8 | GND | GND | > [!WARNING] > The GND connection (pins 7, 8) is mandatory for reliable communication. Without a common ground reference, Modbus communication will be unstable or fail entirely. > [!NOTE] > Communication isolation is only available on 48 V input models. The 12 V and 24 V models have no communication isolation between the RS-485 port and the inverter's DC input. ## Configuration ### Modbus communication parameters | Parameter | Value | |-----------|-------| | Baud rate | 115200 (configurable to 9600 via LCD menu "BRS") | | Data bits | 8 | | Parity | None | | Stop bits | 1 | ### Slave ID > [!WARNING] > The EPever documentation states the **default Modbus slave ID is 3**, but the TapHome template ships with **slave ID 1**. After importing the template, verify and adjust the slave ID in TapHome module settings to match the actual inverter configuration — or change the inverter's slave ID to 1 using EPever's configuration tools. ### Remote control The inverter must be in **remote control mode** before TapHome can switch it on or off. The TapHome template handles this automatically — the module initialization script writes `1` to coil register `0x11` (Local/Remote control) on startup. If remote control is manually disabled on the inverter, the template displays a "Remote control is disabled" warning in TapHome. ## Device capabilities ### AC load monitoring The **AC Load** device is a sensor that reports the inverter's AC output power in kW. The value is calculated from two 16-bit input registers (0x310E and 0x310F) combined into a 32-bit Little Endian value. Two service attributes provide additional detail: - **Load output voltage** — AC voltage delivered to the connected loads - **Load output current** — AC current drawn by the connected loads ### Inverter power control The **Inverter ON/OFF** device is a switch that turns the inverter output on or off via coil register 0x0F. A service action allows manually re-enabling remote control mode if needed. ### Monitoring and protection thresholds The module exposes 13 service attributes at the module level for monitoring and configuration: **Monitoring:** - **Load input voltage** — battery-side DC input voltage - **Device temperature** and **Heat sink temperature** — internal thermal monitoring **Voltage/current protection thresholds (read-only):** - **Low input voltage** — over-discharge immediate disconnect threshold - **High input voltage** — over-voltage immediate disconnect threshold - **High input current** and **High input current recovery** — over-current protection thresholds **Voltage protection thresholds (adjustable via service actions):** - **Low input voltage (5s)** — over-discharge disconnect with 5-second delay - **Low input voltage recovery** — voltage at which the inverter recovers from over-discharge - **High input voltage recovery** — voltage at which the inverter recovers from over-voltage - **High input voltage (5s)** — over-voltage disconnect with 5-second delay **AC output settings (adjustable via service actions):** - **Output AC voltage setting** — 220 V or 230 V (220 V system) / 110 V or 120 V (110 V system) - **Output AC frequency setting** — 50 Hz or 60 Hz > [!WARNING] > Changing the AC output voltage or frequency causes the inverter to **restart automatically**. Connected loads will experience a brief power interruption. ### Status monitoring The module ReadScript continuously monitors the inverter status register (0x3202) and the over-temperature discrete register (0x2000). TapHome displays warnings and errors for the following conditions: - Standby mode, faults, output failure - High voltage side short-circuit, input over-current - Abnormal output voltage, unable to discharge/stop discharging, short-circuit - Device over temperature - Load level (medium, nominal, overload) - Input voltage status (low, high, no connection) ### Additional capabilities The inverter also exposes registers for DC input current (0x3109) and DC input power (0x310A–0x310B) monitoring. A power saving mode coil (0x04) exists but is only supported on the SHI series. These can be added in a future template update. ## Troubleshooting ### No Modbus communication 1. Verify the RJ45 cable is properly seated in the inverter's RS-485 port 2. Check pin assignment — pins 3, 4 (RS485-B) to B-/D- and pins 5, 6 (RS485-A) to A+/D+ on TapHome 3. Confirm the GND connection (pins 7, 8) is wired to TapHome ground 4. Verify the baud rate matches — the inverter defaults to 115200 bps 5. Check the slave ID — the inverter defaults to 3, the TapHome template defaults to 1 ### "Remote control is disabled" warning The template initialization script enables remote control automatically. If this warning appears: 1. Check that the inverter is powered on and communicating 2. Use the **Enable Remote control** service action on the Inverter ON/OFF device 3. If the warning persists, verify that no other Modbus master is writing to coil 0x11 ### Inverter error codes on the LCD | Code | Fault | Resolution | |------|-------|------------| | ILV | Input low voltage | Check battery voltage — must be above 10.8 V (12 V) / 21.6 V (24 V) / 43.2 V (48 V) | | IOV | Input over voltage | Check battery/charge controller voltage — must be below 16 V (12 V) / 32 V (24 V) / 64 V (48 V) | | OOL | Output overload | Reduce connected AC loads, restart inverter | | OSC | Output short circuit | Check load wiring, clear faults via TapHome service action or restart | | OTP | Over temperature | Improve ventilation, wait for cooldown, restart | > [!TIP] > The **Clear the faults** service action in TapHome writes to coil register 0x13 and clears both current and historical faults, resuming normal operation without needing to physically restart the inverter. ## Available devices 2 These devices appear in TapHome after import. EPever IP-Plus Module Service Attributes | | | |-----------------------------|------------------------------------------------------------------------------------------------| | Load input voltage | Battery-side DC input voltage to the inverter | | Device temperature | | | Heat sink temperature | | | Low input voltage | Over-discharge immediate disconnect threshold — read-only, cannot be modified | | Low input voltage (5s) | Over-discharge disconnect threshold with 5-second delay — adjustable via service action | | Low input voltage recovery | Voltage at which the inverter recovers from over-discharge protection | | High input voltage recovery | Voltage at which the inverter recovers from over-voltage protection | | High input voltage (5s) | Over-voltage disconnect threshold with 5-second delay — adjustable via service action | | High input voltage | Over-voltage immediate disconnect threshold — read-only, cannot be modified | | High input current | Over-current protection threshold — read-only, cannot be modified | | High input current recovery | Current at which the inverter recovers from over-current protection — read-only | | Output AC voltage setting | AC output voltage — 220/230 V or 110/120 V depending on system. Inverter restarts after change | | Output AC frequency setting | AC output frequency — 50 Hz or 60 Hz. Inverter restarts after change | Service Actions | | | |-----------------------------------------|-------------------------------------------------------------------------------------------------------------------| | Set Low input voltage - 5s | | | Set Low input voltage recovery voltage | | | Set High input voltage recovery voltage | | | Set High input voltage - 5s | | | Set Output AC voltage | Set AC output voltage — 220 V or 230 V (220 V system) or 110/120 V (110 V system). Inverter restarts after change | | Set Output AC frequency | Set AC output frequency — 50 Hz or 60 Hz. Inverter restarts after change | | Clear the faults | Clears current and historical faults and resumes normal inverter operation | Read (module) ```taphome if(modbusr(D, 0x2000, bool), ADDWARNING("Device over temperature")); var stat := modbusr(A,0x3202,Uint16); if(!getbit(stat, 0), ADDWARNING("Standby")); if(getbit(stat, 1), ADDWARNING("Faults")); if(getbit(stat, 5), ADDWARNING("Output fail")); if(getbit(stat, 6), ADDWARNING("High voltage side short-circuit")); if(getbit(stat, 7), ADDWARNING("Input over-current")); if(getbit(stat, 8), ADDWARNING("Abnormal Output voltage")); if(getbit(stat, 9), ADDWARNING("Unable to stop discharging")); if(getbit(stat, 10), ADDWARNING("Unable to discharge")); if(getbit(stat, 11), ADDWARNING("Short-circuit")); if getbits(stat,12,2) = 0x01 ADDINFO("Medium load"); elseif getbits(stat,12,2) = 0x02 ADDINFO("Nominal Load"); elseif getbits(stat,12,2) = 0x03 ADDERROR("Overload"); end if getbits(stat,14,2) = 0x01 ADDWARNING("Low input voltage"); elseif getbits(stat,14,2) = 0x02 ADDWARNING("High input voltage"); elseif getbits(stat,14,2) = 0x03 ADDWARNING("No connect to the input power, etc."); end ``` Service Attributes Load input voltage \[V] ```taphome modbusr(A, 0x3108, Uint16) / 100 ``` Device temperature \[℃] ```taphome modbusr(A, 0x3111, Int16) / 100 ``` Heat sink temperature \[℃] ```taphome modbusr(A, 0x3112, Int16) / 100 ``` Low input voltage \[V] ```taphome modbusr(H, 0x902F, Uint16) / 100 ``` Low input voltage (5s) \[V] ```taphome modbusr(H, 0x9030, Uint16) / 100 ``` Low input voltage recovery voltage \[V] ```taphome modbusr(H, 0x9031, Uint16) / 100 ``` High input voltage recovery voltage \[V] ```taphome modbusr(H, 0x9032, Uint16) / 100 ``` High input voltage (5s) \[V] ```taphome modbusr(H, 0x9033, Uint16) / 100 ``` High input voltage \[V] ```taphome modbusr(H, 0x9034, Uint16) / 100 ``` High input current \[A] ```taphome modbusr(H, 0x9035, Uint16) / 100 ``` High input current recovery \[A] ```taphome modbusr(H, 0x9036, Uint16) / 100 ``` Output AC voltage setting \[A] ```taphome modbusr(H, 0x9022, Uint16) / 100 ``` Output AC frequency setting \[Hz] ```taphome modbusr(H, 0x9023, Uint16) / 100 ``` Service Actions Set Low input voltage - 5s Parameters: Voltage (1–100 V) ```taphome modbusw(H, 0x9030, Uint16, round(V * 100)) ``` Set Low input voltage recovery voltage Parameters: Voltage (1–100 V) ```taphome modbusw(H, 0x9031, Uint16, round(V * 100)) ``` Set High input voltage recovery voltage Parameters: Voltage (1–100 V) ```taphome modbusw(H, 0x9032, Uint16, round(V * 100)) ``` Set High input voltage - 5s Parameters: Voltage (1–100 V) ```taphome modbusw(H, 0x9033, Uint16, round(V * 100)) ``` Set Output AC voltage Parameters: Voltage ```taphome modbusw(H, 0x9022, Uint16, round(V * 100)) ``` Set Output AC frequency Parameters: Frequency ```taphome modbusw(H, 0x9023, Uint16, round(Hz * 100)) ``` Clear the faults ```taphome modbusw(C, 0x13, bool, 1) ``` AC Load Variable Read-only AC output power in kW — combines two registers into a 32-bit value for precise power measurement Register: A:0x310E LittleEndianUint32 Unit: kW numeric Service Attributes | | | |---------------------|-----------------------------------------| | Load output voltage | AC output voltage delivered to the load | | Load output current | AC output current drawn by the load | Read ```taphome MODBUSR(A, 0x310e, LittleEndianUint32 ) / 100000 ``` Service Attributes Load output voltage \[V] ```taphome modbusr(A, 0x310c, Uint16) / 100 ``` Load output current \[A] ```taphome modbusr(A, 0x310d, Uint16) / 100 ``` Inverter ON/OFF Switch Read and write Turns inverter output on or off — requires remote control to be enabled (handled automatically by the template) Register: C:0x0F Bool Values / States: ON · OFF Service Actions | | | |-----------------------|-----------------------------------------------------------------------------| | Enable Remote control | Enables remote control mode — required before inverter ON/OFF commands work | Read switch state ```taphome MODBUSR(C, 0xf, Bool) ``` Write switch state ```taphome MODBUSW(C, 0xf, Bool, St) ``` Read (module) ```taphome if (!MODBUSR(C, 0x11, Bool), ADDWARNING("Remote control is disabled")) ``` Initialize ```taphome #enable Remote control modbusw(C, 0x11, bool, 1) ``` Service Actions Enable Remote control ```taphome MODBUSW(C, 0x11, Bool, 1) ``` **Connection:** Modbus RTU • 115200 baud• 8N1 • Slave ID: $\[SlaveId] Possible improvements (3) - A:0x3109 Load input current — DC input current (A). May always read 0 on some hardware models that don't support it - A:0x310A+0x310B Load input power — DC input power (W), 32-bit LE. Could complement the AC output power device - C:0x04 Power saving mode enable — Only SHI series supports this — other products do not support it ## Import parameters Enter these values when you import the XML. | Asked in the app | Default | |------------------|---------------| | Slave ID | `1` | | IP address | `192.168.1.0` | ## Sources - Inverter Communication Protocol V1.0 — Modbus Register Map 2026-03-27 [PDF](https://taphome.com/compatibility/devices/epever-ip-plus/manufacturer/modbus-protocol-inverter-v1.0.pdf) - IPower-Plus Series User Manual V3.3 [solarv.de](https://solarv.de/Datenblatt/2020/12/User-Manual-EPEVER-IPower-Plus-Inverter-EN-2024.pdf) 2026-03-27 [PDF](https://taphome.com/compatibility/devices/epever-ip-plus/manufacturer/ipower-plus-user-manual-v3.3.pdf) Manufacturer documents are © their respective owners. They are provided as published by the manufacturer, for reference only. ## Related Documentation - [Modbus Integration](https://taphome.com/en/compatibility/modbus-guide/) - [Modbus](https://taphome.com/en/docs/integration/modbus/) - [Simple configuration using templates](https://taphome.com/en/docs/integration/modbus/templates/) - [Modbus scripts and prefetch](https://taphome.com/en/docs/script/modbus-scripts/) - [Modbus functions](https://taphome.com/en/docs/script/modbus/) - [Modbus data types](https://taphome.com/en/docs/script/modbus-data-types/)