Microchip Technology Inc. has announced a fully digitally-controlled Grid-Connected Solar Micro Inverter Reference Design with an advanced, high-efficiency topology. The free reference design connects to any standard solar panel and converts the panel’s DC output into AC power, which can then be fed into the public power grid. In a real-world application, multiple units can be connected together to achieve the desired power output.
The reference design will enable solar design engineers to optimize energy harvesting, reduce installation costs, and improve system reliability and efficiency while standardizing their designs. These goals are achieved through digital power conversion techniques, supported by the features of Microchip’s dsPIC33F GS series of digital-power Digital Signal Controllers (DSCs).
“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.”
- Peak efficiency of 95%
- Power factor of >0.95
- Output Current THD <3%
- Maximum power point tracking of 99.5%
- Nighttime power consumption of <1W
- System Islanding to detect grid failure
- Full Digital Control
This reference design works with any photovoltaic (PV) panel that supplies a maximum 220 watts output, and it comes in two versions supporting either 110V or 220V power grids. Both versions of this reference design are implemented using a single dsPIC33F GS digital-power DSC, which provides fully digital control of the power-conversion and system-management functions.
Complete documentation, including software, schematics and application note, can be downloaded free from www.microchip.com/get/PLHH
. For additional information, contact any Microchip sales representative or authorized worldwide distributor.