The GoodWe ET G2 series are three-phase hybrid inverters, designed for installations that aim not only to feed energy back into the grid (grid-tie), but also to efficiently work with energy storage systems and provide backup power to selected circuits. Their key advantage lies in the three independent MPPTs, which help better utilize rooftops with different orientations or partial shading - each string can operate at its optimal point, translating to more stable production.
High European efficiency means the inverter maintains excellent performance in typical, real-world operating conditions in Poland, not just in the lab - less losses mean more energy for self-consumption. The ET G2 also offers intelligent operating modes and load control, making it easier to prioritize local consumption.
Monitoring is handled via the app and online platform, and communication can be done via Wi-Fi or Ethernet. The series is compatible with high-voltage energy storage systems, and the required certifications and available warranty extension programs facilitate implementation in residential and larger, multi-family homes.
Ranking
Price offers
| Shop | Country | Price | Per kW | Stock | Offer updated | Link to shop |
|---|---|---|---|---|---|---|
| 7Sun | Poland | 6 388.26 zł incl. VAT | 532.36 zł/kW | In stock | yesterday | Visit shop |
| www.hlumar.sk | Slovakia | 1 483 € incl. VAT | 123.58 €/kW | In stock | 10h ago | Visit shop |
| www.solar-outlet.nl | Netherlands | 1 571.95 € incl. VAT | 131 €/kW | In stock | yesterday | Visit shop |
| ensun.sk | Slovakia | 1 704.57 € incl. VAT | 142.05 €/kW | In stock | 10h ago | Visit shop |
Specifications
Pros and cons
The maximum efficiency of models with a power output of 10-15 kW is 98.2%, while the European standard reaches 97.5% - values comparable to those of leading models (Fronius Symo GEN24: 98.0% EU, SMA STP SE: 97.6% EU). This indicates minimal conversion losses under typical Polish solar conditions.
Models with 10, 12, and 15 kW of power are equipped with 3 independent MPPT (Maximum Power Point Tracking) controllers, and the maximum allowed DC over-sizing is 200% of the rated power. This allows for optimal balancing of strings with different orientations or partial shading, without the need for additional optimizers.
Switching to emergency mode within 10 ms qualifies the inverter to power sensitive devices (NAS, routers, refrigerators) without noticeable interruptions for the equipment. The built-in AFCI (Arc Fault Circuit Interrupter) detects arc faults and disconnects the circuit, reducing the risk of fire - a feature that is not present in many devices in this price range.
The official compatibility list includes the GoodWe Lynx Home F/F G2/D, LG RESU FLEX/Type-R/Prime, and Dyness Tower/Tower Pro and STACK100 batteries. This offers installers the freedom to choose batteries without risking warranty invalidation - a significant advantage over solutions within closed ecosystems.
The series supports simultaneous connection to up to 6 inverters (system power up to 90 kW), which enables scaling installations in multi-family buildings. Full support for asymmetrical phase loading eliminates the need for manual balancing of loads.
Smaller units (GW6K-ET-20, GW8K-ET-20) have 2 MPPTs instead of the 3 available in models with a power output of up to 10 kW. For installations with a roof having 3 different orientations or significant shading, the use of optimizers or redesigning the strings may be necessary, especially at lower power levels.
The SEMS platform is functionally assessed as "basic" by Polish installers and SolarQuotes reviewers, in comparison to FusionSolar (Huawei) or the mySMA portal. A key limitation is the lack of advanced tariff scheduling functionality directly from the mobile app, without requiring web interface configuration.
Alternatives
About the GoodWe ET G2 series
These answers cover the whole series. Where a figure differs, the specification above is this model's own.