GoodWe has announced the completion of an independent DNV technology review of its UT series utility-scale string inverters.
The review included the GW320K-UT, GW320KH-UT, GW350K-UT and GW350KH-UT models, examining not only product design and technical performance, but also reliability, manufacturing quality, supply-chain management and global service capabilities.
For utility-scale PV projects, inverter bankability is not defined by a single product specification, also taking into account predictable energy production, effective management of long-term operational risk, consistent product delivery and lifecycle support, the DNV review providing greater technical transparency into the series, supporting equipment selection, due diligence and long-term risk assessment.
Complex terrain, partial shading and module variations can create string mismatch and affect long-term plant performance. The UT series features up to 15 independent MPPTs, with two PV strings connected to each MPPT, enabling more granular management of different array conditions.
If one MPPT encounters an issue, the remaining trackers can continue operating, helping limit the impact of a localized fault on energy production. DNV noted that this architecture offers distinct advantages in mitigating module mismatch, while eliminating the risk of reverse-current backfeeding associated with multiple parallel strings, enabling a fuse-free design for inherent DC-side safety. Third-party testing also demonstrated static and dynamic MPPT performance above the typical levels of comparable products.
DNV also reviewed the efficiency, power quality, grid adaptability and environmental reliability of the UT series, testing demonstrating strong efficiency and power-quality performance, while reactive power control and optional nighttime SVG functionality support operation under different grid conditions.
Designed for demanding outdoor environments, the UT series can maintain full-load operation at an ambient temperature of 40°C and features IP66 enclosure protection and C5 corrosion protection. The products also underwent dust, vibration, mechanical shock and seismic-related testing.
As part of the review, DNV conducted an on-site assessment of GoodWe’s manufacturing facility in Suzhou, covering supplier management, production controls, product testing and quality traceability.
A spokesperson from the company’s Utility Business Unit (UBU), commented: “For utility-scale PV projects, inverter bankability is built on predictable energy performance, consistent product quality and the supplier’s long-term commitment. The independent DNV technology review gives customers greater transparency into the UT series and the capabilities behind it. We will continue to help customers reduce project risk and strengthen long-term asset value through verifiable performance and lifecycle support.”
