Goodwe GMK120 User manual

V1.0-2022-09-15
(GMK120 |GMK140 |GM330)
Quick Installation Guide
Smart Meter

1
General Safety
Safety Disclaimer
NOTICE
• The information in this quick installation guide is subject to change due to product
updates or other reasons. All descriptions here are for guidance only.
• Before installations, read through the quick installation guide.
• All operations should be performed by trained and knowledgeable technicians who are
familiar with local standards and safety regulations.
• Check the deliverables for correct model, complete contents, and intact appearance.
Contact the manufacturer if any damage is found or any component is missing.
• Strictly follow the installation, operation, and conguration instructions in this guide
and user manual. The manufacturer shall not be liable for equipment damage or
personal injury if you do not follow the instructions. For more warranty details, please
visit https://en.goodwe.com/warranty.
NOTICE
The equipments are designed and tested strictly complies with related safety rules. Read and
follow all the safety instructions and cautions before any operations. Improper operation
might cause personal injury or property damage as the inverters are electrical equipment.
WARNING
• Make sure that the device is powered o before any operations.
• Ensure the cables are connected tightly, securely, and correctly. Inappropriate wiring
may cause poor contact or damage the device.
• Additional circuit breakers are recommended on the voltage input side to avoid
personal injury or device damage.
• Specication of the protective fuse should be 0.5A.
• In areas at risk of lightning, if the input cable of the device exceeds 10m (33ft), you are
recommended to use an external lightning protection device. If the communication
cables are wired with grounded metal conduits, the lightning protection device is not
necessary.
• Strictly follow the National Electrical Code, ANSI/NFPA 70, and Canadian Electrical Code
C22.1 during operations.
SAVE THESE INSTRUCTIONS
Please strictly follow these safety instructions in the user manual during the operation.
01 IMPORTANT SAFETY INSTRUCTIONS

2
Storage
If the equipment is not to be installed or used immediately, please ensure that the storage
environment meets the following requirements:
• Do not unpack the outer package or throw the desiccant away.
• Store the equipment in a clean place. Make sure the temperature and humidity are
appropriate and no condensation.
• If the smart meter has been long term stored, it should be checked by professionals
before being put into use.
Check before Power-on
No. Check Item
1The product is rmly installed at a clean place that is well-ventilated and easy-
to-operate.
2The input power cables, CT Cables, and communication cables are connected
correctly and securely.
3Cable ties are intact, routed properly and evenly.
Personal Requirements
NOTICE
• Personnel who install or maintain the equipment must be strictly trained, learn about
safety precautions and correct operations.
• Only qualied professionals or trained personnel are allowed to install, operate,
maintain, and replace the equipment or parts.

3
RF exposure warning
Federal Communications Commission (FCC) Interference Statement
This equipment complies with FCC radiation exposure limits set forth for an uncontrolled
environment.
This equipment must be installed and operated in accordance with provided instructions and the
antenna(s) used for this transmitter must be installed to provide a separation distance of at least
20 cm from all persons and must not be collocated or operating in conjunction with any other
antenna or transmitter.
This equipment has been tested and found to comply with the limits for a Class B digital device,
pursuant to Part 15 of the FCC Rules.
These limits are designed to provide reasonable protection against harmful interference in a
residential installation. This equipment generate, uses and can radiate radio frequency energy
and, if not installed and used in accordance with the instructions, may cause harmful interference
to radio communications.
However, there is no guarantee that interference will not occur in a particular installation. If
this equipment does cause harmful interference to radio or television reception, which can be
determined by turning the equipment o󽗈 and on, the user is encouraged to try to correct the
interference by one of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit di󽗈erent from that to which the receiver is
connected.
• Consult the dealer or an experienced radio/TV technician for help.
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two
conditions:
1. This device may not cause harmful interference.
2. this device must accept any interference received, including interference that may cause
undesired operation.
FCC Caution: Any changes or modi󽗉cations not expressly approved by the party responsible for
compliance could void the user's authority to operate this equipment.

4
02 Product Introduction
GMK120
Top view
Front View
L3(Reserved)
CT3+(Reserved) CT3-(Reserved)
Indicators
Reset
Button
Bottom view
Side view

5
GMK140
Front View
L3(Reserved)
Indicators
Reset
Button
Top view Bottom view
Side view
CT3+(Reserved)
CT3+(Reserved)
CT3-(Reserved)
CT3-(Reserved)

6
GM330
Front View
Indicators
Reset
Button
Top view Bottom view
Side view

7
CT
Waterproof box
CT direction:House-->Grid

8
GMK120
03 Wiring System
NOTE
• Recommended cross-sectional area of the smart meter input power cable:
1mm2(18AWG).
• CT direction: House-->Grid.
• You are recommended to add fuses with a rated current of 0.5A to L1and L2 on the
meter side.
• To ensure the correctness of the monitoring data, connect CT1 to L1, CT2 to L2. Also,
the N wire, L1, and L2 need to be connected between the loads and the utility meter.
Hybrid
Inverter
Loads
Fuse 0.5A
Household
Meter
Utility Grid

9
GMK140
NOTE
• Recommended cross-sectional area of the smart meter input power cable:
1mm2(18AWG).
• CT direction: House-->Grid.
• You are recommended to add fuses with a rated current of 0.5A to L1and L2 on the
meter side.
• To ensure the correctness of the monitoring data, connect CT1, CT3 to L1, CT2, CT4 to
L2. Also, the N wire, L1, and L2 need to be connected between the loads and the utility
meter.
AC-Coupled
Inverter
Grid-Tied PV Inverter
Loads
PV
Fuse 0.5A
Household
Meter
Utility Grid

10
GM330
NOTE
• Recommended cross-sectional area of the smart meter input power cable:
1mm2(18AWG).
• Customers need to prepare CT and CT cables. Certied CTs are recommended.
Recommended cross-sectional area of the CT cable: 1.6mm2(15AWG).
• CT direction: House-->Grid.
• You are recommended to add fuses with a rated current of 0.5A to L1, L2, and L3 on the
meter side.
• To ensure the correctness of the monitoring data, connect CT1 to L1, CT2 to L2, and CT3
to L3. Also, the N wire, L1, L2,and L3 need to be connected between the loads and the
utility meter.
• Short circuit N and L2 in the three-phase three-line system. Set the smart meter to Three
Phase Three Line mode via Solar Go app or PV Master app. Scan the QR code below to
get more information.
SolarGo App
User Manual
PV Master App
User Manual
Loads
Fuse 0.5A
Meter Utility Grid
PV
Grid-Tied
PV Inverter

11
Packing List
04 Installation
x 1 x 1
oror
x 1
x N x Nx N x N
x 1
x 1 x N x N
N = Quantity depends on the inverter model.
Installation and Cable Connection
NOTE
• The model of the smart meter diers, but the installation and cable connection
steps are the same.In this guide, the GM330 is used as an example to illustrate the
installation steps.
• Connect CT1+, CT1-, CT2+, and CT2- only when connecting cables of GMK120 or
GMK140. CT3+ and CT3- are reserved.
DANGER
• Pay attention to the silkscreens on the device when connecting the voltage input
cables. Otherwise, the device may be damaged.
• Pay attention to the silkscreens on the device when connecting the CT and RS485
cables. Otherwise, the read-in data may be wrong.

12
Installing the rail
NOTE
• You are recommended to remove the cable hole cover using a screwdriver and a
rubber hammer. Do not damage the smart meter when removing the cover.
• You are recommended to use the cable hole at the bottom of the box to ensure its
waterproof performance. Customers need to prepare PG21 and PG16 waterproof
connectors and tighten the connectors at the cable hole.
Installing the waterproof box
Model Tightening torque for RS485 terminals
GMK120 0.2N·m
GMK140 0.2N·m
GM330 0.5N·m

13

14

15
Type Status Description
Steady on Power on, no RS485 communication.
Blinking Power on, RS485 communication works properly.
O Power o.
O Reserved.
Steady on Purchasing from the utility grid.
Blinking Selling to the utility grid.
O No purchasing or selling.
Steady on Purchasing from the utility grid.
Blinking Selling to the utility grid.
O No purchasing or selling.
Press Time Description
≥ 5s Reset the smart meter.
05 Commissioning
(Only for GMK140)
Indicator
Power ON
Step 1 Connect the smart meter cables.
Step 2 Turn on the breaker on the voltage input side. Then the smart meter is powered on.
Reset Button

16
06 Maintenance
WARNING
• Make sure that the smart meter is powered o.
• Wear proper PPE before any operations.
DANGER
INSTRUCTIONS PERTAINING TO A RISK OF FIRE OR ELECTRIC SHOCK
Power o the smart meter before operations and maintenance. Otherwise, the smart
meter may be damaged or electric shocks may occur.
Removing the Smart meter
Disposing of the Smart meter
Turn o the breaker on the voltage input side. Then the smart meter is powered o.
Step1 Disconnect all the cables, including input power cable cables, CT cables, RS485
communication cables.
Step2 Press the buckle at the bottom of the device to take it from the rail.
Step3 Store the smart meter properly. If the smart meter needs to be used later,
ensure that the storage conditions meet the requirements.
Power OFF
If the smart meter cannot work anymore, dispose of it according to the local disposal
requirements for electrical equipment waste. The smart meter cannot be disposed of
together with household waste.

17
Model GMK120 GMK140 GM330
Technical parameters
Input
Grid
Single-phase(L/N ≤ 265Vac)
Split-phase(L/N≤ 265Vac)
Three-phase(3-wire,L/L≤
265Vac)
Three-phase(4-wire,L/N≤
265Vac)
Three-phase(3-
wire,L/L ≤ 576Vac)
Three-phase(4-
wire,L/N ≤ 520Vac)
Frequency 50/60Hz
Voltage Rated voltage 208V, 120V / 240V 277V/480V
Voltage range 0.88Un-1.1Un
Current Rated current 200A 5A(MAX)
Current range 0-200A 0-5A
Communication RS485 interface, Modbus-RTU
Communication Distance RS485:1000m(Use shielded twisted-pair cables)
Display and button
4 LED (Power supply and network communication
indicator,Wireless indicator(reserved),Energy
consumption indicator1,Energy consumption
indicator2), Reset button
Measurement precision
Voltage/Current: 0.5 level
Active energy: 0.5 level
Reactive energy: 1 level
Power supply Power consumption ≤5W
Structural
parameters
Dimension (L x W x H) 85 x 72 x 72mm/33.5×28.3×28.3in
Weight 240g/0.53lb
Installtion Rail installation
Environment
paraments
Protection class IP20
Working temperature -30℃-+70℃/-22℉-+158℉
Storage temperature -30℃-+70℃/-22℉-+158℉
Relative humidity 0%-95%, non-condensing
Altitude ≤ 3000m/9842ft
07 Technical Parameters
NOTE
The smart meters are not kilowatt-hour metering devices. They can only be used to
calculate the element and energy in solar and hybrid systems. Please refer to the data
measured by a standard kilowatt-hour meter when you need to calculate the electricity
tari.

GoodWe Technologies Co., Ltd.
No. 90 Zijin Rd., New District, Suzhou, 215011, China
www.goodwe.com
[email protected] 340-00732-02 Local Contacts
Ocial Website