KSTAR unveiled its G465KTH series string inverter for utility applications
According to the company, this SiC-based inverter has a maximum conversion efficiency of 99.1%
This inverter has a safety and protection range of AFCI, automatic AC/DC terminal temperature monitoring, and PV module I-V curve scanning, among others
China-based PV inverter and energy storage system KSTAR Science and Technology Co., Ltd. highlighted its G465KTH series utility-scale string inverter at SNEC PV+ 2026.
Equipped with 6 MPPT channels, each with up to 105 A PV current-carrying capacity, the inverter can deliver up to 465 kW of 3-phase power output at 1,000 V (AC) output voltage. According to the company, this DC power architecture, which evenly distributes PV arrays across the MPPTs, allows installation on undulating terrain with varying tilt angles and multiple orientations. Compared to a central inverter-based site layout, this distributed configuration reduces PV module mismatch losses and maximizes solar harvesting. Each MPPT’s current capacity also makes the inverter compatible with market-available bifacial PV modules with respective short-circuit current. It features silicon carbide (SiC)-based power switching devices with higher switching frequency and up to 25% additional power density than its IGBT-based counterparts, the company notes. It has a maximum conversion efficiency of 99.1% and a 100 V higher maximum operational system voltage than conventional string inverters’ 1,500 V (DC). This higher voltage allows for 2 additional PV modules in each PV string, leading to higher yield and reduced CapEx. Its higher AC output voltage compared to traditional 400-, 600-, or 800 V also enables more than 25% power transmission to the central substation via cables, the company claims.
From a safety point of view, each inverter features an automatic arc fault circuit interrupter (AFCI) safety function, with a detection range of more than 1,000 m radius. In the event of an electric arc formation in a PV module or modules, it activates and detects the exact location of the fault, isolating the faulty string within 0.5 seconds. The inverter’s automatic AC/DC terminal temperature monitoring function continuously tracks any thermal anomaly between strings and helps predict faults. It is housed inside an IP66-rated enclosure, making it suitable for indoor and harsh outdoor installations, including desert, rain, storms, and dust.
Regarding internal dust, its cooling fan can reverse its rotation to automatically blow away the accumulated dust into the environment. During operation, the operation and maintenance (O&M) personnel can activate the inverter’s built-in PV module I-V scanning function to check PV module health. Its embedded algorithm can detect up to 24 types of module degradation and share a report within 10 minutes, optimizing O&M costs and helping replace faulty modules quickly. For a remote site with weak grid strength, as quantified by its short-circuit ratio (SCR), installed inverters often disconnect due to the wide range of voltage instability from the grid side. According to the company, this inverter is designed to continue operating in sync with a grid with SCR >0.93.
