Connect and configure Growatt inverters

Overview

Follow the the steps below to connect one of the following inverters to SolarAssistant:

  • Growatt
  • Sigineer

Step 1 - Select inverter

On the configuration page, select "Growatt" as your inverter model.

SolarAssistant Growatt inverter selection

Step 2 - Select USB ports

Devices connected via USB will show up. Select all ports that are Growatt inverters and press "Connect".

SolarAssistant Growatt USB ports

Growatt SPF range (SPF ES, SPF TL HVM, SPF TL LVM, SPF T DVM, etc.)

a USB Type B cable plugged into the inverter port that is usually located at the bottom of the inverter.

Growatt SPH USB port USB Type B cable

Growatt SPH range

Option 1 - If your RS232 port is not occupied by the Growatt WiFi dongle

A USB serial cable can be plugged into WiFi RS232 port located on the bottom of the inverter. This is a normal USB serial cable available from most electronic stores.

RS232 DB9 USB cable Growatt RS232 port

Option 2 - The RS485-2 port

In your inverter settings. Set the RS485 port setting to VPP mode.

We don't currently sell an RS485 cable for this port, but you can make your own cable by buying a USB to RS485 adapter and cutting a normal computer network cable or crimping an RJ45 plug.

Growatt SPH pinout Growat SPH RS485-2 port

Option 3 - If you have a RS485-3 port (typically found on the SPH 3 phase)

We don't currently sell an RS485 cable for this port, but you can make your own cable by buying a USB to RS485 adapter and cutting a normal computer network cable or crimping an RJ45 plug.

Growatt SPH pinout Growat SPH RS485-3 port

Troubleshooting

If you do not get a reponse from your SPH inverter via RS485, try pins 4 and 5 instead as shown in the official Growatt SPH documentation below.

Growat SPH pinout

If you are unable to find VPP mode on your inverter, it should be available under WorkMode/RS485 as described in the Growatt SPH documentation:

Growatt SPH VPP mode