The GoodWe ET (ET G2) series are three-phase hybrid inverters designed for maximizing self-consumption and stable operation in residential and small commercial PV installations. Their key advantage is UPS standard backup - the switching is so efficient that in practice, it maintains operation of selected circuits without annoying interruptions. The series offers three independent MPPTs, facilitating the design of installations on different roof pitches and improving yields during partial shading, as each string can operate at its own power point. High European efficiency means genuinely fewer losses under typical operating conditions, thus more energy available for consumption or battery charging. The ET works with high-voltage energy storage systems and supports smart load management, including peak shaving and phase-asymmetrical energy feeding. Monitoring is done via the SEMS portal and app, as well as communication interfaces such as WiFi and LAN. It's also worth noting the available safety features, such as optional AFCI.
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Specifications
Pros and cons
The official datasheet for the ET G2 specifies a switchover time to backup power of less than 10 ms, which, in practice, corresponds to the standard for industrial-grade UPS systems. Competitors in this segment (e.g., Huawei SUN2000-L1, Fronius Symo GEN24) declare a switchover time of 20-30 ms, which, with sensitive devices (NAS, routers, refrigerators), can lead to device restarts.
Three separate MPPT (Maximum Power Point Tracking) controllers allow you to connect PV (photovoltaic) strings with different orientations and inclines without affecting each other's power points. The allowable DC overload is 200% of the nominal power, which enables the installation of a larger string without the need for a higher-power inverter - typically reducing the CAPEX (capital expenditure) of the installation by 5-10%.
The ET G2 datasheet confirms η_max = 98.2% and an European efficiency exceeding 97%, placing the series among the leading three-phase hybrid inverters in the 6-15 kW class. This translates to significantly lower conversion losses throughout the year, under the variable solar irradiation conditions typical of Poland.
GoodWe maintains its Tier 1 status from BloombergNEF and achieved it again in Q1 2026, which confirms the financial viability of the manufacturer and facilitates project financing by banks and funds. The installed global capacity exceeds 100 GW, resulting in a mature service network and ongoing technical support.
The ET G2 series offers integrated AFCI (Arc Fault Circuit Interrupter) that detects arc faults on the DC side - a feature required by some insurers and building codes (IEC 63027). DC and AC surge protection is integrated and factory-installed, eliminating the need to purchase additional surge protection devices.
Independent reviews (from SolarQuotes Australia and installer forums) confirm that ET models rely on natural convection cooling and note a significant reduction in power output when the ambient temperature exceeds 45°C. While the climate in Poland rarely exceeds this temperature outdoors, inverters installed in unshaded, poorly ventilated technical rooms (garages, boiler rooms) may experience derating in July/August, limiting output during peak production hours.
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About the GoodWe ET series
These answers cover the whole series. Where a figure differs, the specification above is this model's own.