Overview
Solar power and battery storage have become central to the energy transition, and both depend on power electronics that convert energy efficiently at high frequency. Solar inverters and storage converters must handle a high DC bus, operate continuously, and deliver clean, grid-compliant output. Cree silicon carbide MOSFETs and Schottky diodes provide the building blocks, and BeiLuo supplies them with genuine traceability and FAE support.
Solar Inverter Architecture
A string solar inverter begins with a DC-DC boost stage that implements maximum power point tracking, followed by a DC-AC inverter stage that feeds the grid. Both stages benefit from silicon carbide. A C3M0016120K 1200 V SiC MOSFET with a 16 milliohm on-resistance switches fast with low loss, so the boost stage can run at high frequency with a small inductor and the inverter bridge can switch efficiently at a high frequency for compact output filtering. The 1200 V rating provides the margin a high DC bus needs, and the robust body diode with low reverse-recovery charge simplifies the freewheeling path.
Maximum Power Point Tracking
Maximum power point tracking squeezes the last watt from every panel. The boost stage switches at high frequency while the control algorithm adjusts the duty cycle to track the panel operating point under partial shading and passing clouds. High switching frequency improves tracking speed and reduces inductor size, which is exactly where SiC shines. A C4D10120A SiC Schottky diode has no reverse-recovery charge, so it keeps the high-frequency boost path free of recovery loss and noise.
Battery Energy Storage
Battery storage uses bidirectional converters that both charge and discharge, so the power stage switches continuously in both directions. Because the same devices handle both modes, efficiency and thermal behavior matter at every operating point, not only at peak output. SiC MOSFETs keep conversion losses small across the whole state-of-charge range, and SiC diodes freewheel cleanly in both directions, which supports the high cycle counts storage demands. For heavy freewheeling duty, a parallel C4D40120D SiC diode removes recovery loss entirely.
Thermal and Reliability
SiC raises the switching frequency, which shrinks the magnetics, but it also concentrates the loss in a smaller area, so the thermal path becomes important. The C3M package spreads heat through the baseplate and the drain tab, and the four-lead TO-247-4 keeps the gate loop tight to control ringing. Plan the thermal design for the highest ambient the enclosure will see, and confirm the junction temperature with a conservative margin, because a solar inverter must keep working through high daytime temperatures and through many years of operation.
Selection and Supply
Selection starts with the DC bus and the current, then narrows by on-resistance, package and cost, with the diode matched to the freewheeling and rectification duty. BeiLuo keeps mainstream Cree SiC MOSFET and diode models in regional stock, ships them with import declaration, certificate of origin and RoHS documents, and supports selection, gate drive and thermal design with an in-house FAE team. From a rooftop string inverter to a grid-scale storage system, our engineers help you choose the SiC devices that keep the converter efficient, compact and reliable.