Solar inverter hits 99 per cent efficiency with SiC modules

March 31, 2020 //By Nick Flaherty
Sungrow’s latest 250kW solar inverter uses customised silicon carbide SiC power modules from Infineon Technologies.
Sungrow’s latest 250kW solar inverter uses customised silicon carbide SiC power modules from Infineon to get 99 per cent conversion efficiency.

Sungrow's latest 250kW PV string inverter uses customised EasyPACK 3B power modules equipped with TRENCHSTOP and CoolSiC chip technologies from INfineon Technologies.

The SG250HX uses the SiC module with high voltage 1500Vdc and 800Vac operation to give the string inverter a maximum of 99 percent efficiency and a power density of 1kW/l.

“Combining our Si and SiC chip technologies, this is another proof point for our strategy to turn from product thinking to system understanding,” said Dr. Peter Wawer, President of the Industrial Power Control Division of Infineon.”Proprietary know-how and production capacity in frontend and backend puts us in the position to realize customer specific solutions within months.”

The SiC module allows the heat sink to be reduced in both size and weight significantly. The higher frequency operation also means smaller passive components can be used to further reduce the weight to 95 kg. The dimensions of 1051 x 660 x 363 mm means the inverter has a a power density of approximately 1000 W/l.

The system uses twelve MPPT (Maximum Power Point Tracking) controllers and a flexible block design allowing for up to 6.3 MW blocks for utility scale photovoltaic applications. With smart forced air-cooling technology, the SG250HX can operate at extremely high temperatures without derating.

"Sungrow is dedicated to paving the way for grid parity across Europe with growing technical innovations. We are accelerating our global step to fulfill the corporate mission of ‘clean power for all," said Stefan Froboese, Technical Director at Sungrow Europe.

www.infineon.com

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