The GoodWe GT series comprises three-phase string grid-tie inverters designed for commercial and industrial applications, where stable operation, high yield, and rapid diagnostics are essential. These inverters feature multi-point MPPT tracking, which facilitates the design of complex PV systems by efficiently managing different roof orientations, varied strings, and minimizing losses due to partial shading. An additional advantage is the optional PID recovery function, which supports maintaining module performance in demanding operating conditions. Thanks to its high European efficiency, the inverter effectively minimizes conversion losses under typical operating conditions in Poland, translating to increased annual energy fed into the grid. A key asset is DC and AC safety, supported by features like overvoltage protection and a robust construction suitable for industrial environments. Remote monitoring and communication functions (e.g., via network and portal/app) are available for system oversight, simplifying maintenance and production control. The GT series is not hybrid - it is the ideal choice for companies focused on maximizing production in on-grid systems.
Ranking
Specifications
Pros and cons
GW100K-GT and GW125K-GT achieve a maximum efficiency of 99.0% and 98.5% respectively, which places them above the median efficiency of commercially available three-phase inverters (typically 98.0-98.3% EU efficiency). For a 500 kWp installation, the difference of 0.2% in European efficiency translates to approximately 700-900 kWh/year more energy injected into the grid under Polish conditions.
The ability to handle 21 A per string allows for the connection of high-power modules (700+ Wp, 20+ A Isc) without the need for additional combinators. With 10 independent MPPTs per 125-150 kW model, it is possible to efficiently manage extensive PV arrays with various orientations, minimizing cross-string losses. This represents a significant advantage over models offering 4-6 MPPTs in this power range.
The allowable overload on the DC side up to 150% of the rated power, and on the AC side up to 110% (continuous), gives designers significant freedom in selecting PV panels and reducing the number of inverters per installation. This translates to a real reduction in CAPEX on combiner boxes and cabling compared to systems requiring a ≤130% DC factor.
The enclosure meets IP66 standards, with an optional C5 anti-corrosion coating (ISO 12944 standard), allowing installation in ports, chemical plants, and coastal areas without the need for an additional external enclosure. Built-in Type II surge protection on both DC and AC sides is included - no additional SPD costs are required.
GoodWe maintains its Tier 1 status with BloombergNEF consistently; the latest confirmation for Q1 2026 signifies acceptance by major financial institutions funding PV projects in European markets. For commercial projects financed through loans or leasing, this is a formal requirement that many less expensive brands do not meet.
The GT series includes models with a power output of 100 kW or higher, which makes it unsuitable for commercial installations below approximately 350-400 kWp (where an optimal selection would require units in the 50-80 kW range). For mid-sized projects, it is necessary to consider other GoodWe series (e.g., MT 50-80 kW) or competing brands (Sungrow SG110CX, Huawei SUN2000-100K).
The GT series is strictly grid-tied and does not allow for the addition of batteries - retrofitting for a hybrid system requires replacing the inverter. Given the growing interest in BESS (Battery Energy Storage Systems) in commercial and industrial (C&I) applications and the evolving regulations regarding RB (e.g., the requirement for energy storage in new renewable energy contracts), this represents a limitation on the flexibility of the project over a 5-10-year horizon.
Alternatives
About the GT series
These answers cover the whole series. Where a figure differs, the specification above is this model's own.