Microchip Technology publicized its fully digitally controlled grid-connected solar micro inverter reference design, which features an enhanced, high efficiency topology. According to the company, peak efficiency of 95% was reached with maximum power point tracking of 99.5% and nighttime power consumption less than 1W.
“This reference design will help the solar power industry to quickly improve its inverter technology, through the use of more flexible and efficient digital power conversion techniques,” said Sumit Mitra, vice president of Microchip’s high performance microcontroller division. “The transition to digital power will enable solar energy conversion to be maximized, while reducing the installation and overall costs of solar systems.”
The reference design is noted to work with any PV panel that provides a maximum 220W output and comes in two separate versions that support either 110V or 220V power grids. Both versions use one dsPIC33 GS digital power DSC.
Full software, schematic and application notes can be downloaded here.