Installation · SolaX

Install GridZeno on SolaX X1-Mini and X1-Boost G4.

The X1-Mini G4 and X1-Boost G4 are single-phase grid inverters without a battery, with the same port. GridZeno can show the production. SolaX' protocol has no export limit the dongle can use on them, and there's no battery to control. RS485 is on pins 4 and 5 in the RJ45 port COM/CT, and the inverter end is crimped with only the two wires that are needed.

Applies to: X1-MINI 0.6-4.0K-G4, X1-MINI 5K/6K-G4-P (G4 Plus) and X1-BOOST 2.5-6K-G4
Connection: Network cable with RJ45 plug
Time: About 25 minutes

A grid inverter without a battery. GridZeno shows what it produces but can't control anything on it. What GridZeno can do on SolaX X1-Mini and X1-Boost G4

How the dongle recognises it: The serial number is in holding 0x300. XM4 and ZA4 are X1-Mini G4, XB4 is X1-Boost G4. The dongle reads the two the same way. The X1-Mini G4 Plus (5K and 6K-G4-P) has no public register map and isn't recognised yet.

GridZeno Dongle for SolaX X1-Mini and X1-Boost G4

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. An RJ45 plug comes with the inverter in the accessory bag.
Phillips screwdriver (PH1): For the screw on the COM/CT port.
USB power: A 5 V USB charger and a cable with USB-C.

The port

On the underside of the inverter, next to the Dongle port. The port has a screw and a waterproof cable gland that the cable is passed through.

Port: COM/CT

The COM/CT port, with the pins numbered as SolaX numbers them. Pins 4 and 5 are RS485, pin 7 carries 3.3 V for DRM. The plug shown with the contacts facing you and the locking tab at the back: pin 1 is furthest to the left.

Pin 4 A, 485_A
Pin 5 B, 485_B
Pin 7 Must not be connected, +3.3V, DRM

The cable

A network cable where the inverter end is crimped with only two wires: the dongle's A on pin 4 and B on pin 5. The rest of the positions in the plug are empty. The port has no RS485 GND, so the white/green wire isn't used. A and B are on the same pins as in the dongle, but make the cable with only the wires that are needed anyway, so that no other pins in the inverter's port are connected.

From the dongle to the inverter
Dongle end	Inverter end
Dongle pin 4, blue (A)	SolaX pin 4, 485_A
Dongle pin 5, white/blue (B)	SolaX pin 5, 485_B
The other wires	Cut off and insulated

Settings

On the inverter

Settings > Communication > RS485 CommAddr: 1, as set at the factory. Settings requires the installer code, which is 2014 from the factory.

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: SolaX, X1-Mini or X1-Boost
Connection: By cable (RS485)
RS485 settings: Address 1 and 8N1. SolaX doesn't mention the baud rate in the manual: start with 9600, and try 19200 if the dongle gets no answer.

Step by step

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

1
Check the address
Hold Enter down to open the menu, go to Settings, and type the installer code. Go on to Communication and RS485 CommAddr. The address must be 1, as set at the factory.
2
Open the COM/CT port
Switch the inverter off. Unscrew the screw on the COM/CT port with a PH1 screwdriver, and take off the waterproof cable gland.
3
Pass the cable through the cable gland
Cut off the plug at the inverter end, and pass the cable through the waterproof cable gland before the new plug is crimped on.
4
Crimp the inverter end with two wires
Strip 10 to 15 mm. Crimp a new plug on with blue (A) on pin 4 and white/blue (B) on pin 5. The other wires are cut off and insulated.
5
Plug it into COM/CT
Press the plug into the COM/CT port until it clicks. Tighten the screw, and tighten the cable gland.
6
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.
7
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.
8
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.
9
Log in, and choose your inverter
Log in to GridZeno. Welcome pairs the dongle with its device ID. Then choose your inverter, SolaX X1-Mini or X1-Boost, and the connection By cable (RS485). Press Save inverter, and the dongle fetches its setup and reads the inverter. If the dongle gets no answer, go to System, press Change inverter, and set the baud rate to 19200 under RS485 settings.

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

Take care

Pin 7 in COM/CT carries 3.3 V for DRM. An ordinary network cable connects all eight pins, so the inverter end must be crimped with only the two wires.

COM/CT is the inverter's only RS485 port, and SolaX uses the same pins 4 and 5 for the energy meter, DataHub, Adapter Box G2 and the EV charger, and pins 1 and 8 for the current clamp. If there's already a cable in COM/CT, write to us before you connect the dongle.

The Dongle port is for SolaX's own Pocket WiFi. The dongle doesn't go in it.

The dongle's firmware doesn't recognise the X1-Mini G4 Plus (5K and 6K-G4-P) yet, because there's no public register map for it.

COM/CT isn't a network port. Never plug it into a router or switch.

What GridZeno can control on SolaX X1-Mini and X1-Boost G4, and how, is on the page about SolaX X1-Mini and X1-Boost G4. If you're stuck, write to us with the model name.

Source

Ports, pins and menus are from the manufacturer's own manual: SolaX X1-MINI G4 0.6-4.0 kW User Manual, Version 9.0 (2026-06-30), X1-MINI G4 PLUS User Manual, v3.0, and X1-BOOST G4 2.5-6 kW User Manual, Version 10.0 (2026-06-30), Section 7.5, COM/CT Port Connection (X1-MINI: tables 7-6, 7-7, 7-9 and 7-10; X1-BOOST: tables 7-5, 7-6, 7-8 and 7-9), and 9.4, Detailed Operation of Settings, Communication.