D105: Monitoring Deye inverter via RS485 Modbus

Features:

Connection to the Deye inverter via RS485 Modbus
Network connection – WiFi
Data update rate: 5 seconds
Data transfer and visualization
- Cloud dashboard
- MQTT
Integration with Home Assistant

How does it work?

Connected to a Deye inverter, smart-MAIC D105 universal meter reads data from inverter's registers via the Modbus protocol. User determines which data to read. Inverter's registers are described in inverter's Modbus RTU Protocol documentation. Data reading frequency is up to 5 seconds. A maximum of 9 registers can be read.

Data received from inverter is transferred to a cloud database and is available for visualization on the smart-MAIC dashboard using graphs and widgets. Alternatively, data can be sent to an MQTT broker. Simple integration with the Home Assistant system is supported.

Using smart-MAIC E2 relay module, you can set up simple automation based on data received from inverter.

Connection and setup.

D105 meter is installed in inverter's connection bay.

It is connected to Deye inverter via four wires:

230V power supply from terminals on inverter
RS485 A and RS485 B are connected to inverter via an RJ45 connector

Connecting smart-MAIC D105 universal meter to a WiFi network is described in the instructions

https://smart-maic.com/manual/d105.html#

On the D105 WEB interface, it is necessary to configure work with Modbus by specifying which inverter registers to read.

Example 1 - settings for inverter operating with batteries with BMS

d.T1 - (96) [V] grid, network voltage
d.T2 - (BE) [W] battery, charge (negative)/discharge (positive) power
d.T3 - (AC) [W] Grid external Total Power
d.T4 - (B2) [W] load side Total power
d.T5 - (B6) battery temperature -1000
Ch1 - (B8) [%] battery SOC % charge
TCh1 - (4F) [Hz] grid, network frequency
CH2 -
TCh2 -