The GoodWe XS G3 series are single-phase grid-tie inverters designed for small and medium residential installations, where rapid installation, high work ethic, and stable energy production are key priorities. These devices stand out with their compact housing and smooth operation thanks to their fanless design, making them suitable not only for twin-row installations but also when the inverter is mounted near residential areas.
The XS G3 features 1 MPPT - an ideal solution for simple systems with one roof orientation. MPPT ensures panels operate at their optimal point, helping minimize losses under variable sunlight and partial shading. High European efficiency means better yields in real-world weather conditions typical of Poland, not just in the lab.
The series supports remote monitoring via the GoodWe monitoring platform and popular communication options (e.g., Wi-Fi and wired solutions), facilitating diagnostics and export control. The housing with enhanced sealing (IP66) and optional security features (including lightning and overvoltage protection) increase safety. This is the choice for homeowners seeking a simple, reliable grid-connected inverter without energy storage.
Ranking
Specifications
Pros and cons
The enclosure weighs only 4.6 kg, with dimensions equivalent to an A4 sheet, which reduces assembly time and allows for installation by a single person without the need for additional equipment. For comparison, single-phase inverters with the same power rating from SMA (Sunny Boy 3.0) weigh approximately 8.3 kg.
The fanless design eliminates moving parts, reducing the risk of mechanical failure and making the power supply operate almost silently (less than 20 dB according to datasheets). IP66 rating allows for installation in outdoor or unventilated environments without concerns about condensation or dust.
The acceptable DC to AC power ratio is 200%, while the competitive GoodWe DNS G3 (2 MPPT) has a ratio of 150%. The higher oversizing ratio allows for connecting a larger number of panels while maintaining the inverter's rated power, which results in better performance during low morning and evening sunlight.
With a maximum efficiency of 97.6% and a declared European efficiency of ~97%, the XS G3 is in the top quartile of single-phase inverters up to 3.3 kW. The high European efficiency is particularly important in Polish climatic conditions, where the proportion of hours with partial sunlight is higher than in southern Europe.
The availability of optional arc fault circuit interrupters (AFCIs) and Type II surge protectors, both on DC and AC sides, makes the XS G3 compliant with the stringent requirements of insurance companies and the PN-EN 63027 standard. Not all budget-friendly inverters of this power rating offer AFCIs as an option.
The XS G3 series features only one MPPT, while the direct successor offered by GoodWe - the DNS G3 series (3-6 kW) - has two MPPTs. In installations with panels on two different orientations or with partial shading, the lack of a second MPPT can result in annual energy losses of 5-15% compared to a two-MPPT configuration.
The power range of 0.7-3.3 kW covers only micro-installations, while the median power of new prosumer installations in Poland (URE 2024 data) is approximately 7-9 kWp. For the average single-family home, the XS G3 series is too small and would require a switch to DNS G3 or SDT G3, which limits its market to very small buildings and vacation homes.
Alternatives
About the XS G3 series
These answers cover the whole series. Where a figure differs, the specification above is this model's own.