GoodWe ET series are hybrid three-phase inverters designed for installations where simultaneous self-consumption, energy storage, and assured backup power are crucial. These devices feature intelligent operational modes - including load management, time-of-use operation, and peak-shaving - helping to reduce peak power demand. The implemented multi-string MPPT facilitates optimized energy yield, especially when panels are in different orientations or partially shaded.
High European efficiency translates to genuinely better performance under typical Polish conditions - not just under ideal sunlight but also with variable weather. Monitoring is convenient via communication (e.g., Wi-Fi and Ethernet) and an app that allows tracking of energy production, consumption, and storage operation. The ET series is compatible with high-voltage energy storage systems (e.g., GoodWe Lynx Home F), and the entire system includes required network certifications and manufacturer warranty. This is an excellent choice for larger homes and small to medium-sized businesses.
Ranking
Price offers
| Shop | Country | Price | Per kW | Stock | Offer updated | Link to shop |
|---|---|---|---|---|---|---|
| Sklep Soltech | Poland | 10 932.32 zł net | 273.31 zł/kW | Not stated | 21h ago | Visit shop |
| www.hlumar.sk | Slovakia | 3 210 € incl. VAT | 80.25 €/kW | In stock | 10h ago | Visit shop |
Specifications
Pros and cons
The ET PLUS+ series achieves a maximum efficiency of 98.2%, while the 15-30 kW models achieve 98.0%. This represents a significantly higher annual yield compared to mid-range competitors (typically 97.5-97.8%), particularly in Poland, where variable solar irradiation is common.
The ET series offers several variants with 2 or 3 independent MPPT inputs, allowing you to connect strings of panels with different orientations or tilt angles, and minimizing shading losses without the need for optimizers.
The time it takes to switch to backup mode (EPS/backup) is less than 10 ms, which meets the power supply requirements for sensitive devices (servers, medical equipment) specified by UPS systems. Most competing three-phase hybrid inverters operate in the range of 20-100 ms.
Built-in peak-shaving (reducing peak energy consumption from the grid) and Time-of-Use (managing charging/discharging according to hourly rates) features are particularly valuable for small businesses that use time-of-use tariffs or for collective prosumers.
Compatibility with high-voltage batteries in the range of 180-600 V allows for use with GoodWe Lynx Home F, BYD HVS/HVM, and other HV batteries, increasing the flexibility in choosing a battery without the need for voltage converters.
Independent reviews (Clean Energy Reviews, SolarQuotes AU) indicate that ET inverters may reduce power output on hot days due to limitations in convective cooling, which, during the summer months with high solar irradiance, can slightly reduce actual output compared to the specified values.
Users and installers (on forums like SolarQuotes and DIY Solar Forum) consistently report issues with Wi-Fi disconnections and false alarms from the communication module. Monitoring through the SEMS portal is often outdated; it is recommended to use Ethernet instead of Wi-Fi.
In the case of more serious technical issues, support is directed directly to GoodWe's headquarters in Suzhou. However, due to language and time zone barriers, this can extend the time it takes for Polish installers and end-users to resolve the problem.
Alternatives
About the ET series
These answers cover the whole series. Where a figure differs, the specification above is this model's own.