Device Comparison
GoodWe GMK110 vs GMK330 vs GM3000
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Use this comparison when you want a GoodWe-native meter and need to choose between the simple single-phase GMK110, the more flexible GMK330, and the dedicated three-phase GM3000.
| Install fit | |||
|---|---|---|---|
| Phase support | Single-phase (1P2W) | 1P2W / 3P3W / 3P4W | Three-phase (3L+N/400Vac) |
| Installation | DIN-rail mounted single-phase smart meter with one included current transformer | DIN-rail mounted smart meter with 3 included current transformers | DIN-rail mounted three-phase smart meter with 3 included current transformers |
| Measurement | CT-based bidirectional single-phase smart meter for load monitoring and export-power control | CT-based bidirectional smart meter for local consumption monitoring, export power limiting, and load monitoring in GoodWe solar and storage systems | CT-based three-phase smart meter for voltage, current, power, energy, and export-limiting workflows in GoodWe systems |
| Max current | 120 A | 120 A | 120 A |
| Meter fit | |||
| Accuracy class | Class 1 | Class 0.5 (voltage/current and active energy) / Class 1 (reactive energy) | Class 1 (voltage/current and active power) / Class 2 (reactive power) |
| Current sensing | 1 x 120A CT included | 3 x 120A:40mA CTs included on the current GMK330 configuration; GoodWe notes the earlier 200A:50mA CT version is being phased out after June 2026 | 3 x 120A/40mA current transformers included |
| Monitoring | |||
| Protocol | RS485 | RS485 | RS485 / Modbus |
| Local API | No | No | No |
| Cloud dependency | GoodWe SEMS and the compatible inverter ecosystem are typically used for normal monitoring, export-control workflows, and system visibility. | GoodWe SEMS and the compatible inverter ecosystem are typically used for normal monitoring, export-control workflows, and energy-management visibility. | GoodWe SEMS and compatible GoodWe inverter workflows are typically used for normal monitoring, energy-management visibility, and export-control operation. |
| Home Assistant | No | No | No |
| Solar fit | |||
| Solar import/export | Yes | Yes | Yes |
| Buying context | |||
| Price range | Unknown | Installer-supplied or bundled with compatible GoodWe systems | Installer-quoted |
| Availability | Global / region-dependent GoodWe availability | Global / region-dependent GoodWe residential-meter availability | North America official page / broader global GoodWe smart-meter family availability varies by market |
| Source check | |||
| Last verified | May 18, 2026 | May 19, 2026 | May 21, 2026 |
| Product page | Official page | Official page | Official page |
| Documentation | Official docs | Official docs | Official docs |
Verdict
Choose GMK110 for straightforward single-phase homes, GMK330 for mixed wiring flexibility, and GM3000 when a dedicated three-phase GoodWe setup is the better fit.