Read a Deye inverter locally: RS485 gateway or Wi‑Fi stick

Which Deye devices work locally?

Locally SUNA reads the Deye hybrid inverters with battery: three-phase for example SUN‑12K‑SG04LP3, SG05LP3 and the high-voltage SG01HP3 series, single-phase the SG0xLP1 (still beta). String and micro inverters without a battery only work via the cloud with SUNA Online so far.

The two ways compared

• RS485 gateway: a small device for about 30 to 40 € on the Modbus port of the inverter, connected to the router by cable. The most reliable way, stable in SUNA and tested in continuous operation on a SUN‑12K‑SG05LP3.
• Wi‑Fi stick: the Solarman data logger that is already on the Deye. No extra hardware, SUNA queries it on your home network on port 8899. Still beta; if it drops out often, the gateway is the better choice.
• Either way the Deye app keeps working as before, and new values arrive every 10 seconds, even without internet.

Way 1: set up an RS485 gateway

1. Get an RS485 to Ethernet gateway, for example the Waveshare RS485 TO POE ETH. It needs power via PoE or a power supply and a network cable to the router.
2. Connect the gateway to the Modbus port of the inverter (A, B and ground). Which wire goes where is in the manual of your Deye. Do not use the battery (BMS) or meter port, two masters on one bus disturb each other.
3. Set up the gateway: 9600 baud, 8 data bits, no parity, 1 stop bit (8N1), mode “Modbus TCP to RTU”, TCP server on port 502. Ideally give it a fixed IP address in your router.
4. In SUNA Home under Setup, Inverter choose “Deye hybrid (single- and three-phase)”, enter the IP address of the gateway, port 502 and Modbus address 1, and start. If the inverter does not answer, try Modbus address 0.

Way 2: use the Wi‑Fi stick

1. Look up the IP address of the stick in your router. It is often called “wifi-logger” or similar there. Ideally make the address fixed in the router.
2. Read the serial number of the stick: it is on the label after “SN”, usually 10 digits, and in the app under devices. Do not use the serial number of the inverter.
3. In SUNA Home under Setup, Inverter choose “Deye hybrid via Wi‑Fi stick”, enter IP address, serial number and port 8899, and start.

If no values arrive

• “Not reachable”: the IP address is wrong, the gateway or stick has no power or is on another network.
• “Refused”: the port is wrong, or the gateway is not set to “Modbus TCP to RTU”.
• “Device does not answer”: A and B swapped, wrong port, wrong baud rate or wrong Modbus address. Swap A and B first, then try address 0.

Without your own hardware: via the cloud

If you do not want to connect anything, SUNA Online shows your Deye via Deye Cloud or SOLARMAN Smart, depending on which app you see your plant in today. New values then arrive about every 5 minutes, but you can see them anywhere.