The GoodWe XS series are single-phase grid-tie inverters designed for small domestic installations, where unproblematic installation and quiet operation are key. The devices are exceptionally compact - their size, comparable to an A4 sheet, facilitates installation even in limited spaces, and the noiseless design is ideal for garages or technical rooms. Reliable performance is ensured by the 1 MPPT, which effectively handles typical single-string module configurations - on simple roofs, it maintains high energy production while minimising losses due to module mismatch.
A key feature is the high European efficiency, which in practice translates to better yields under real working conditions in Poland, not just in a laboratory. The XS series also offers WiFi or LAN communication, making monitoring via the portal and the SEMS app convenient for both the user and the installer. Additional features, such as export power limitation and energy consumption monitoring, are available with appropriate accessories. This is an excellent choice for prosumers seeking a simple, modern inverter with a complete set of required certifications (including NC RfG).
Ranking
Specifications
Pros and cons
The XS series achieves an European efficiency of 97.2% (data from the official GoodWe datasheet), placing it in the upper range of the segment of small single-phase inverters. In the Polish climate, where operation with partial loads is the norm, this translates to significantly higher annual yields compared to devices with efficiencies of 96-96.5%.
The inverter weighs only 5.8 kg and has dimensions similar to an A4-sized sheet of paper. Silent cooling using natural convection (without a fan) eliminates noise and reduces the risk of mechanical failure, making installation in a garage or technical room a fully practical solution.
The XS series supports over-voltage protection up to 130% of the rated power and can start even with an input voltage of 40 V. This means earlier operation in the morning, longer operation in the evening, and better power utilization during cloudy weather - a significant advantage in Poland's climate with its high variability in solar radiation.
Both wired and wireless communication are built-in (without the need for an additional module), ensuring comprehensive monitoring in the SEMS portal and mobile app for both the user and the installer. The system also includes features for limiting power export using HomeKit accessories.
The series meets the required certification standards for connection to the Polish grid (e.g., NC RfG), which eliminates the risk of encountering formal issues when the installation is accepted by the distribution network operator. GoodWe is listed on BNEF Tier-1 as a bankable manufacturer, which facilitates financing and insurance for the installation.
The XS series (including the G3 generation) covers power capacities ranging from 0.7 to 3.3 kW, which corresponds to systems with approximately 10-12 panels. Consumers planning a system exceeding 3 kW (typical new installation of 4-6 kWp) will need to choose a different GoodWe series (e.g., DNS, SDT) or a product from another manufacturer. Furthermore, any future expansion will require replacing the inverter.
A single MPPT (Maximum Power Point Tracking) tracker prevents independent tracking of strings on roofs with different orientations or slopes. Competitors in a similar price range that offer 2 MPPT systems (e.g., Fronius GEN24 1-Phase, SMA Sunny Boy) provide a real advantage for roofs with even two separate sections, which is a common scenario in residential construction in Poland.
The standard warranty is 5 years; extending it to 10 years (for equipment produced after 01.09.2024) requires active connection to the SEMS monitoring system and installation by a certified GoodWe Plus+ partner. Some competitors (e.g., SMA Sunny Boy) offer a 5+10-year warranty without the installer certification requirement.
Alternatives
About the XS series
These answers cover the whole series. Where a figure differs, the specification above is this model's own.