Device Comparison
GoodWe GMK110 vs GMK330 vs GM3000
A GoodWe smart meter family comparison for single-phase, flexible CT-based monitoring, and dedicated three-phase inverter support.
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Which To Choose
Start with the practical fit, then read the table.
GoodWe Smart Meter GMK110
Best fit when single-phase 1P2W; 85-288 V L-N, 50/60 Hz, solar import/export visibility, and local dashboards and Home Assistant.
GoodWe GMK330 Smart Meter
Best fit when 1P2W / 3P3W / 3P4W, solar import/export visibility, and local dashboards and Home Assistant.
GoodWe Smart Meter GM3000
Best fit when three-phase four-wire (3L+N), nominal 400 Vac, 50/60 Hz; voltage range 0.7-1.2 Un., solar import/export visibility, and local dashboards and Home Assistant.
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.
At A Glance
Key fit signals before the full table
A quick pass over the most decision-shaping details for each device in this featured comparison.
GoodWe Smart Meter GMK110
- Phase
- Single-phase 1P2W; 85-288 V L-N, 50/60 Hz
- Installation
- Indoor one-module DIN-rail installation inside a distribution box; IP20 meter with one external 120 A:40 mA CT; qualified installation required.
- Measurement
- CT-based single-phase grid-connection-point monitoring for load tracking and export-power control; energy readings are reference-only, not utility billing.
- Max current
- 120 A
GoodWe GMK330 Smart Meter
- Phase
- 1P2W / 3P3W / 3P4W
- Installation
- Indoor DIN-rail mounted IP20 smart meter with external CTs.
- Measurement
- CT-based grid-connection-point reference/control meter for consumption, load, import/export, export limiting and zero-feed; not a utility billing meter.
- Max current
- 120 A
GoodWe Smart Meter GM3000
- Phase
- Three-phase four-wire (3L+N), nominal 400 Vac, 50/60 Hz; voltage range 0.7-1.2 Un.
- Installation
- Indoor IP20, two-module (36 mm) DIN-rail meter with three external CTs; qualified installation and correct phase/CT orientation required.
- Measurement
- CT-based three-phase smart meter for voltage, current, power, energy, and export-limiting workflows in GoodWe systems
- Max current
- 120 A
Before You Decide
Checks that matter before price.
- Confirm your supply type first: single-phase, split-phase, or three-phase.
- Decide whether DIN-rail wiring, CT clamps, or utility-meter access fits your switchboard.
- Choose between cloud convenience and local data access before comparing prices.
- For solar homes, make sure import, export, and load readings are measured at the right point.
| Install fit | |||
|---|---|---|---|
| Phase support | Single-phase 1P2W; 85-288 V L-N, 50/60 Hz | 1P2W / 3P3W / 3P4W | Three-phase four-wire (3L+N), nominal 400 Vac, 50/60 Hz; voltage range 0.7-1.2 Un. |
| Installation | Indoor one-module DIN-rail installation inside a distribution box; IP20 meter with one external 120 A:40 mA CT; qualified installation required. | Indoor DIN-rail mounted IP20 smart meter with external CTs. | Indoor IP20, two-module (36 mm) DIN-rail meter with three external CTs; qualified installation and correct phase/CT orientation required. |
| Measurement | CT-based single-phase grid-connection-point monitoring for load tracking and export-power control; energy readings are reference-only, not utility billing. | CT-based grid-connection-point reference/control meter for consumption, load, import/export, export limiting and zero-feed; not a utility billing meter. | 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 voltage/current; Class 1 active energy; Class 2 reactive energy | Class 0.5 voltage/current and active energy; Class 1 reactive energy | Voltage/current Class 1; active power Class 1; reactive power Class 2. |
| Current sensing | 1 x fixed-ratio 120 A:40 mA CT; GoodWe states the CT is not replaceable. Earlier 200 A:50 mA CT versions are phased out after June 2026. | 3 external CTs included; current production is unified to 120 A:40 mA. The previous 200 A:50 mA CT version was phased out after June 2026. | 3 x external 120 A / 40 mA CTs included; default CT cable length 3 m, extendable to 5 m; each CT must match its phase and face House (K) toward Grid (L). |
| Monitoring | |||
| Protocol | RS485 (up to 1000 m documented communication distance) | RS485 | RS485 Modbus RTU, 9600 baud (meter-to-inverter cable up to 100 m) |
| Local API | Yes | Yes | Yes |
| Cloud dependency | No cloud is required for the meter-to-inverter RS485 measurement/control path. SEMS is optional for remote monitoring and broader system visibility. | No cloud required for the local RS485 meter link to a compatible GoodWe inverter/controller; SEMS cloud is optional for wider system monitoring. | Local RS485 meter link; SEMS cloud is optional through the compatible GoodWe inverter system. |
| Home Assistant | Yes | Yes | Yes |
| 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 GoodWe product line with current localized GMK110 pages across Europe, Latin America, Brazil, and China; stock, certification, compatible inverter support, and channel access vary by country. | Global GoodWe residential smart-meter range; regional availability and compatible inverter lists vary by market and distributor channel. | GoodWe lists GM3000 documentation across international, EU, UK, USA, Australia, Brazil, India, Japan, South Africa and other selected markets; exact availability and certification vary by country. |
| Source check | |||
| Last verified | Sep 27, 2026 | Sep 4, 2026 | Sep 18, 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.
FAQ
Common decision questions.
Which energy meter should I choose?
Choose the option that matches your installation constraints and data path first. For 3 energy meter options, the full table is most useful after you know whether local data access, cloud convenience, backup behavior, solar visibility, or expansion matters most.
What should I check before comparing prices?
Check installation fit, required accessories, official documentation, monitoring platform support, and any unknown fields in the source-checked table. Price is only useful once those constraints are clear.
Can these devices work with local dashboards or Home Assistant?
GoodWe Smart Meter GMK110, GoodWe GMK330 Smart Meter, GoodWe Smart Meter GM3000 list Home Assistant support in the catalog. GoodWe Smart Meter GMK110, GoodWe GMK330 Smart Meter, GoodWe Smart Meter GM3000 are marked with local API support. Confirm firmware, region, and integration maturity before treating this as a final compatibility guarantee.
Are unknown fields a reason to avoid a device?
Not always. Unknown means the field was not confirmed from the reviewed source data. Treat it as a question for the installer, reseller, or manufacturer before making a purchase decision.
Does the verdict replace the specification table?
No. The verdict is a practical shortcut. Use the table to confirm the exact constraints that matter for your home, especially installation, monitoring, and support details.