Installation · Growatt

Install GridZeno on Growatt MIN TL-XH2 (RJ45).

MIN TL-XH2 also comes with six RJ45 ports under a waterproof cover instead of round connectors. The dongle goes in the SYN port, where pins 3 and 6 are Growatt's connection for monitoring from other manufacturers. The inverter end is crimped with only those two wires.

Applies to: MIN 2500-6000TL-XH2 with six RJ45 ports
Connection: Network cable with RJ45 plug
Time: About 25 minutes

The battery is controlled with Growatt's VPP protocol: a command with power and duration, which the dongle removes itself when the block ends. What GridZeno can do on Growatt MIN TL-XH2 (RJ45)

How the dongle recognises it: The type code 5100, when only the VPP ranges answer (the charge level in 31217), not the range from 3000 or 0-124.

GridZeno Dongle for Growatt MIN TL-XH2 (RJ45)

What you need

GridZeno Dongle: The device ID is on the label, e.g. GZ-A1B2C3.
Cable: A network cable that's re-crimped at the inverter end with only two wires.
RJ45 plug and crimping tool: For the inverter end.
Screwdriver: For the waterproof cover over the RJ45 ports.
USB power: A 5 V USB charger and a cable with USB-C.

The port

In the block of six RJ45 ports on the underside, under the waterproof cover: DRMS and COM at the top, BAT and Meter in the middle, SYN and RS485 at the bottom.

Port: SYN

The SYN port, with Growatt's pin numbering. A is on pin 3 and B on pin 6. The plug shown with the contacts facing you and the locking tab at the back: pin 1 is furthest to the left.

Pin 3 A, RS485A2
Pin 6 B, RS485B2

The cable

A network cable where the inverter end is crimped with only two wires: the dongle's A (blue, pin 4) on pin 3 and B (white/blue, pin 5) on pin 6. The rest of the positions in the plug are empty. An ordinary straight cable doesn't work here.

From the dongle to the inverter
Dongle end	Inverter end
Dongle pin 4, blue (A)	SYN pin 3, RS485A2
Dongle pin 5, white/blue (B)	SYN pin 6, RS485B2
The other wires	Cut off and insulated

Settings

On the inverter

Settings > General > Address: 001, as from the factory
Modbus: Modbus RTU at 9600 baud, 8N1. That's what the dongle uses from the factory, so there's nothing to set.

In GridZeno's Welcome

The inverter is chosen in GridZeno: in Welcome the first time, and later under System, Change inverter. The dongle fetches its setup from there.

Manufacturer and model: Growatt, MIN
Connection: By cable (RS485)
RS485 settings: Keep the default: 9600 baud, 8N1, address 1.

Step by step

Each step has a small drawing that shows what to do.

1
Check the address
Press the touch button once to scroll, and twice to select. Go to Settings, General and Address. It should be set to 001, as from the factory.
2
Switch off the inverter, and remove the RJ45 cover
Turn off the AC breaker, set the DC switch to OFF, and switch off the battery's switch. Unscrew the waterproof cover over the six RJ45 ports.
3
Crimp the inverter end with two wires
Cut off the plug at the inverter end. Crimp a new RJ45 plug on with blue (A) on pin 3 and white/blue (B) on pin 6. The other wires are cut off and insulated. The other end, for the dongle, keeps its plug.
4
Pass the cable through the cover
Pass the cable through the waterproof cover and the threaded sleeve, and press it into the rubber ring from the side. Put sealing plugs in the holes that aren't used.
5
Plug the connector into SYN
Press the plug into the SYN port at the bottom left until it clicks.
6
Screw the cover back on
Press the rubber ring into place, screw the cover on, and tighten the cap on the threaded sleeve so the port is sealed.
7
Plug the RJ45 end into the dongle
The cable's other end goes into the dongle's RS485 port. Place the dongle somewhere dry and close to the inverter, so the cable doesn't hang from the plug.
8
Connect power to the dongle
Plug the USB-C cable into the dongle and the charger into a socket. The dongle starts by itself. It gets power from the charger, not from the inverter.
9
Connect the dongle to the network
Over Wi-Fi: the first time, the dongle creates its own Wi-Fi, GridZeno-Setup- followed by the last characters of the device ID. Connect your phone to it, choose your own network, enter the password, and press Save and connect. When it says Connection OK, press Go to GridZeno. Over cable (LAN): plug a network cable from the router into the dongle's network port.
10
Log in, and choose your inverter
Log in to GridZeno. Welcome pairs the dongle with its device ID. Then choose your inverter, Growatt MIN, and the connection By cable (RS485). Press Save inverter, and the dongle fetches its setup and reads the inverter.

The dongle's own setup is described with screenshots in The user guide, and the pairing in Getting started.

Take care

Use SYN. BAT is the battery's connection, Meter the energy meter's, and RS485 is Growatt's VPP connection.

SYN is also used by Growatt's backup box (SYN). If you have a backup box connected, write to us before you connect the dongle.

What GridZeno can control on Growatt MIN TL-XH2 (RJ45), and how, is on the page about Growatt MIN TL-XH2 (RJ45). If you're stuck, write to us with the model name.

Source

Ports, pins and menus are from the manufacturer's own manual: Growatt MIN 2.5-6K TL-XH2 User Manual, RJ45 (GR-UM-290-A-02, EN), Section 3.1, Overview, 6.6, RJ45 ports, 7.2.2, Set inverter COM address, and 7.4.1, RJ45 Ports Pin Definitions.