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Cree SiC MOSFETs solar inverters move forward

Silicon carbide MOSFET technology can significantly improve weight, cost and efficiency in PV inverters
Cree and Delta Energy Systems have made a breakthrough in the photovoltaic (PV) inverter industry with the release of Delta’s new generation of solar inverters.

They utilise Cree's SiC power MOSFETs in next-generation PV inverters which can enable significant new milestones in power density, efficiency and weight.


Cree SiC device

“The next-generation PV inverters from Delta are designed to set a new milestone of power density by utilising SiC MOSFETs,” comments Klaus Gremmelspacher, head of research and development for PV inverters at Delta Energy Systems. “The SiC MOSFETs from Cree were essential for us to realise our goals for new, high-power inverters that are lightweight and have industry-leading efficiency.”

Cree released its first SiC MOSFETs in 2011 and a dramatically improved, second-generation SiC MOSFET in 2013.

Now, as a milestone product announcement, Delta Energy Systems, a subsidiary of Delta Electronics Group, one of the world’s largest providers of power management solutions, has incorporated Cree SiC MOSFETs into its next-generation solar power inverter.

Utilising 1200V SiC MOSFET’s from Cree in an 11kW PV inverter, Delta has already been able to extend the DC input voltage range while increasing the maximum efficiency of its previous products. The Delta 11kW booster, which employs Cree’s SiC MOSFET  now has 1kV DC input instead of 900V, is targeted for release in Q2 2013.

Scott Allen, senior director of marketing, Cree Power, remarks, “We are pleased and honoured to have Delta Energy Systems as a customer for our SiC MOSFET. They are utilising the 1200V, 160mΩ MOSFET, which has matured rapidly since its release in 2011 and offers industry-leading performance and cost. Advanced technology customers like Delta are now moving aggressively forward with our SiC MOSFET technology, which enables reduced size, weight and cost for PV inverters, from 20 to 50 percent when compared with silicon, while at the same time maintaining or increasing efficiency.”

Packaged SiC MOSFETs from Cree are available from DigiKey and Mouser, and dies are available from SemiDice.

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