Mitsubishi Electric Corp has prototyped a power conditioner for photovoltaic (PV) batteries using a silicon carbide (SiC)-based MOSFET and a Schottky barrier diode. The company claims that it has managed to achieve a power conversion efficiency of 98%, which is the highest in Japan and it’s planning to commercialize it within three years. The highest conversion efficiency that Mitsubishi Electric has so far achieved with a commercialized power conditioner for PV batteries is 97.5%, achieved by combining a Si power semiconductor and an inverter technology call gradation control. Mitsubishi Electric is now busy trying to combine a SiC power semiconductor and the gradation technology.
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