Connect a MUST inverter to SolarAssistant
Overview
The steps below apply to all MUST inverters that are supported by SolarAssistant:
- MUST PH/PV/PC range
- MUST EP range
Step 1 - Connect inverter monitoring cable
Option A - Inverter USB port
The USB port of MUST inverters is a USB Type B port. It's a common cable found in many electronic stores. It's often called a printer USB cable.
![USB Type B cable](https://d26qlef5ak4prm.cloudfront.net/images/help/configuration/cable-usb-b-531eb0c52caa1a1158bcd15bc2056cc7.png?vsn=d)
![MUST USB type B port](https://d26qlef5ak4prm.cloudfront.net/images/help/must/usb-b-61aadef0ad3940cbd57d4b1f6c49e5d9.png?vsn=d)
Option B - Inverter RS485/COM port
A MUST inverter uses the same USB RS485 cable as the Deye/SunSynk inverters. This connection option is the most reliable.
![MUST USB RS485 cable](https://d26qlef5ak4prm.cloudfront.net/images/shop/products/sunsynk_rs485-full-12a917d91eb04c437614ae54f14872d0.png?vsn=d)
![MUST USB RS485 port](https://d26qlef5ak4prm.cloudfront.net/images/help/must/com-rs485-24e3f638994c6605838ee9f355de7ca7.png?vsn=d)
Step 2 - Configure SolarAssistant to connect to a MUST inverter
On the configuration page, select "MUST" as your inverter model.
![SolarAssistant MUST inverter selection](https://d26qlef5ak4prm.cloudfront.net/images/help/must/select-5d2d396d8c7c3847e0bf0f46716243bf.png?vsn=d)
Select the USB port(s) where you have MUST inverters connected. There will typically be one option.
![Select MUST USB ports](https://d26qlef5ak4prm.cloudfront.net/images/help/must/usb-ports-0975931a601668811f834fb1a2062d8a.png?vsn=d)
Click connect:
![Select connect](https://d26qlef5ak4prm.cloudfront.net/images/help/general/connect-devices-f0c245ec497688023244d37ce10e005d.png?vsn=d)
Parallel installations
With MUST inverters you only need to connect one inverter to read all parallel inverters regardless of whether you use the COM/RS485 port or the USB type B port.
Troubleshooting
If you have any issue, please try the official SolarPowerMonitor application from a laptop. If it works with these official applications, then it should work with SolarAssistant.