Description
Non-invasive current measurement without electrical downtime.
GoodWe GMK330 is a complete commercial three-phase smart energy meter kit bundled with three pre-calibrated split-core current transformers, engineered for fast, non-invasive installation on commercial switchboards and large solar installations.
Turnkey Kit with 3 Matched Split-Core CTs
Eliminates component matching guesswork, arriving complete with 3 pre-calibrated current transformers in the box.
Non-Invasive High-Current Installation
Split-core CTs clamp around main commercial busbars without cutting conductors or shutting down building power.
Class 0.5S High Precision Metering
Utility-grade measurement accuracy for dynamic zero-export limiting, commercial peak shaving, and sub-billing analytics.
Direct Integration with GoodWe SEC & ET Inverters
High-speed RS485 Modbus telemetry ensures instantaneous closed-loop power modulation.
More product details
Installing solid-core CTs requires de-energizing the whole building and unbolting main busbar lugs. The GMK330 kit includes 3 snap-together split-core CTs that clamp around live or de-energized conductors in minutes.
- Pre-matched CTs clamp around large cables and busbars without cutting copper conductors.
- Measures three-phase active power, reactive power, power factor, and bidirectional energy flow.
- Factory-calibrated secondary leads connect directly to the meter’s input terminals.
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High-speed synchronization with GoodWe SEC controllers and inverters.
The GMK330 communicates over an isolated RS485 twisted-pair bus, delivering real-time power telemetry to GoodWe commercial inverters and SEC energy controllers. High-speed Modbus RTU protocol pre-configured for GoodWe commercial inverters and SEC controllers. Backlit LCD display shows real-time line voltages, line currents, frequency, and active power per phase. Low internal standby power draw (< 3 W) ensures minimal parasitic system losses.
Takes three 120 A split-core clamps
Three calibrated 120 A : 40 mA current transformers ship in the box, enabling fast non-invasive connection around phase conductors.
Holds Class 0.5 active precision
Delivers Class 0.5 accuracy on active energy, voltage, and current alongside Class 1 reactive energy precision.
Fits four DIN modules on the rail
The 72 x 85 x 72 mm housing weighs 240 g and clips to standard 35 mm rail, operating from minus 30 to 70 °C in IP20.
Technical data
Turnkey commercial energy telemetry engineered for rapid, non-invasive switchboard deployment.
Commercial three-phase smart meter kit bundled with 3 pre-calibrated split-core CTs.
Pre-packaged for fast commercial installation, the GMK330 bundles the GM330 meter with three matched split-core current transformers. It allows electricians to clamp around large commercial busbars without disconnecting heavy incoming service cables, instantly providing Class 0.5S high-precision 3-phase telemetry to GoodWe inverters and SEC energy controllers.
- 3 CTs Included
- Turnkey Kit
- Utility Precision
- Class 0.5S
- 4U DIN-Rail Format
- 72 mm
- Fast Telemetry
- < 1s
Measurement
- Supported grid types
- 1P2W / 3P3W / 3P4W
- Connection
- Current transformers, 3 supplied
- Number of current transformers
- 3
- Operating voltage, 3P4W (Vac)
- 90 ~ 264 L-N
- Operating voltage, 3P3W (Vac)
- 90 ~ 264 L-L
- Frequency (Hz)
- 50 / 60
- Current transformer ratio
- 120 A : 40 mA (EMEA)
- Accuracy, voltage / current
- Class 0.5
- Accuracy, active energy
- Class 0.5
- Accuracy, reactive energy
- Class 1
Communication
- Method
- RS485
- Distance (m)
- 1000
Physical
- Ingress protection
- IP20
- Operating temperature (°C)
- -30 ~ +70
- Dimensions (W × H × D, mm)
- 72 × 85 × 72
- Housing
- 4 modules
- Mounting
- DIN rail
- Weight (g)
- 240
- Power consumption (W)
- < 5
- User interface
- 4 LED, reset button
Project fit
Where this model fits.
Scenarios that show which projects the GoodWe GMK330 belongs in, what to verify before quoting, and when another model is the better pick.
Fast Turnkey Commercial Solar Deployments (>100 A Service)
Commercial installations deploying GoodWe ET 15–50 kW or ETC/BTC inverters where installers need a guaranteed complete meter-and-CT kit in a single box.
Arrives pre-matched with 3 split-core CTs, saving procurement time and eliminating CT ratio mismatch errors during commissioning.
- Confirm this model against the adjacent rating in the same family
Documents
GoodWe GMK330 datasheet (EN) GoodWe GMK330 DatasheetProduct questions
What is the main advantage of ordering the GMK330 kit over the standalone GM330?
Guaranteed CT compatibility and single-box convenience. The GMK330 kit includes 3 pre-calibrated split-core current transformers tested specifically with the meter's internal measurement processor. This avoids ordering the wrong CT secondary ratio (5 A vs 1 A) or incompatible burden ratings.
Can the split-core CTs be clamped on without shutting down building power?
Yes. Split-core design allows non-invasive installation around insulated cables. The split-core current transformers feature a snap-open hinge mechanism that clamps directly around existing insulated cables or busbars, eliminating the need to unbolt power lugs or coordinate costly facility power shutdowns.