Growatt Smart Meters Manual: Installation & Configuration per Model – 4Blue B.V.

Growatt smart meters are essential for monitoring, export limitation, and integration with battery systems. In this article you will read:

What a smart meter is and what it offers you.
A complete overview of all Growatt smart meters.
Installation steps per model, including wiring, RS485 connections, and settings.
Common errors and how to solve them.
Configuration instructions per meter, including steps and examples.
See attachment "4blue Roadshow 2025.pdf" pages 19 to 29 for additional images and insights for the installation.

Order directly? View all Growatt products

What to consider during installation?

The complete installation of a Growatt smart meter consists of three parts:

Mounting the smart meter in the main distribution board (MDB)
Connecting the communication cable (RS485) between meter and inverter
Configuring the inverter for correct reading of the meter data

With this manual, you know exactly what you need and how to set it up step by step. This ensures a well-functioning system that manages generated energy smartly.

What does a Growatt smart meter do?

A Growatt smart meter measures your consumption and yield in real time. Crucial if you want to:

Limit export to the grid.
Optimally charge/discharge batteries.
Manage your energy consumption more intelligently.

Advantages:

Accurate data measurement
Supports RS485 (Modbus) → also possible wirelessly with the Grohomemanager-X
Seamless integration with Growatt hybrid or retrofit installations

Overview of Growatt Smart Meters

Single-phase smart meters

Model

CT support

Product code

Power (max)

Application

RS485 connection meter

RS485 connection inverter

SDM120CT

✅ Yes

SPM-CT-E

100A via CT

Hybrid

Pin 9 (A)
Pin 10 (B)

MIN-XH: 
Pin 5 (A)
Pin 6 (B)

SDM230

❌ No

SPM-E

100A direct

Hybrid

Pin 5 (A)
 Pin 6 (B)

DDSU666

❌ No

SPM-C

80A direct

Hybrid

Pin 24 (A)
Pin 25 (B)

Three-phase smart meters

Model	CT support	Product code	Power (max)	Application	RS485 connection meter	RS485 connection inverter
SDM630 Modbus V3	❌ No	TPM-E	100A direct	Hybrid	A+ (A), B- (B)	MOD-XH/MID-XH: Pin 5 (A), Pin 6 (B) MID-X: Pin 7 (A), Pin 8 (B) MAX*
SDM630MCT	✅ Yes	TPM-CT-E	100A via CT	Retrofit 1-phase with MIN-XH & hybrid 3-phase	Pin 14 (A), Pin 13 (B)
DTSU666	❌ Optional	TPM-C	80A direct / >80A with CT	Hybrid	Pin 24 (A), Pin 25 (B)
DTSU666 (6CT)	✅ Yes	TPM-6CT-C	>80A via external CT	Retrofit	difference per model: Pin 24 (A), Pin 25 (B) or RJ45 connector white/blue on RS485-1 A white/orange on RS485-1 B

*In case only one MAX inverter is used, the smart meter can be connected as indicated below.

Retrofit configuration

System	Recommended smart meter	Inverter type
1-phase retrofit	SDM630MCT (TPM-CT-E)	Growatt MIN-XH
3-phase retrofit	DTSU666 6CT (TPM-6CT-C)	Growatt MOD-XH, MID-XH, MID-X and MAX

1-2) Installation manual per smart meter

SDM120CT (SPM-CT-E) – 1-phase with CT

Mounting: DIN rail
Connections:
- RS485 A: meter pin 10 → inverter pin 5 (white-orange)
- RS485 B: meter pin 9 → inverter pin 6 (white-blue)
Address: 001
Password: 1000

SDM230 (SPM-E) – 1-phase

Mounting: DIN rail
Connections:
- RS485 A: meter pin 5 → inverter pin 5
- RS485 B: meter pin 6 → inverter pin 6
Address: 001
Password: 1000

DDSU666 (SPM-C) – 1-phase

Mounting: DIN rail
Connections:
- RS485 A: meter pin 24 → inverter pin 5
- RS485 B: meter pin 25 → inverter pin 6
Address: 003
Password: 701

SDM630 Modbus V3 (TPM-E) – 3-phase

Connections:
- RS485 A: A+ → inverter pin 5
- RS485 B: B- → inverter pin 6
Address: 002
Password: 1000

SDM630MCT (TPM-CT-E) – 3-phase with CT

Mounting: DIN rail
Connections:
- RS485 A: meter pin 14 → inverter pin 5
- RS485 B: meter pin 13 → inverter pin 6
Address: 002
Password: 1000

DTSU666 (TPM-C) – 3-phase

Mounting: DIN rail
Connections:
- RS485 A: meter pin 24 → inverter pin 5
- RS485 B: meter pin 25 → inverter pin 6
Address: 004
Password: 701

DTSU666 with 6 CTs (TPM-6CT-C) – 3-phase retrofit

Mounting: DIN rail
Note: Place CTs with arrow pointing towards consumer (K → L)
Connections:
- RS485 A: meter pin 24 → inverter pin 5
- RS485 B: meter pin 25 → inverter pin 6
Address: 004
Password: 701

3) Adjust inverter settings (hybrid & retrofit)

Once the Growatt smart meter is correctly connected and communication is established, you still need to configure the inverter. This depends on the type of installation: hybrid or retrofit.

You can adjust the settings via:

The display of the inverter (OLED screen)
The ShineTools app
The online OSS portal

Note: Are you using a retrofit system and the option System retrofit is not available? Then a firmware update is required.

Via the inverter display

For hybrid and retrofit systems:

Go to Set parameters
Choose Advanced
Enter the password 123
Navigate to Power Sensor Meter
Set this to On

Button operation:

Press once = select
Press twice = confirm
Press three times = back

Step 2 (only for retrofit):
Then go to Set parameters > Work Mode and set it to System retrofit.
- See the image below for setting the work mode.

Via the ShineTools app

For hybrid systems:

Add an electric meter via the settings menu
See the image below for the correct step.

Note:

iOS: Electric meter

Android: Meter

Also found under:

For retrofit systems:

Add the meter (as mentioned above) and change the Work Mode to System retrofit
See the image below for setting retrofit via the app.

Via the OSS portal