For the past few years, I’ve integrated several residential inverters into different Home Assistant setups using the Huawei Solar integration. Everything went smoothly, and I never encountered any problems — with or without a dongle, the connection was always fine.
Lately, however, I’ve been trying to integrate inverters in a business context, and I haven’t had any luck. All of them have an sDongle, and I’ve tried connecting them the same way I did in my residential setups over the past few years, but it doesn’t seem to work. All connection parameters are the same between the residential and business installations (Modbus, parallel communication, etc.).
I’ve also ensured that the Dongle is connected to the exact same network as my Home Assistant instance, and I have its IP address. Modbus is enabled and unrestricted on all of them. I tried both ports (502 and 6607).
Here are the specifications:
Inverter Type:SUN2000-40KTL-M3
Inverter Firmware Version:V100R001C20SPC147
sDongle Type:SDongleA-05
sDongle Connectivity:WiFi
sDongle Firmware Version:V200R022C10SPC201
Is there anything I should try differently? I’ve searched everywhere for possible solutions, tried them all, and nothing seems to work.