If just one solar panel in a rooftop array falls under shade, the performance of all of the panels typically drops. That’s because an array’s electrical voltage and current are usually set at just one point: the inverter that changes direct current to alternating current. The settings the inverter can choose are determined by the worst-performing solar panel. National Semiconductor of Santa Clara, CA, has developed power management circuitry that adjusts the voltage on each panel to match its power output. Field tests show that the gadget can reduce losses from unshaded panels by 57 percent.
Courtesy of National Semiconductor
Product: Solar Magic
Company: National Semiconductor
Other products in this section:
The Year Climate Change Began to Spin Out of Control
Fires ravaged the West, hurricanes battered the East—and still emissions continued to rise.
How to Get Wyoming Wind to California, and Cut 80% of U.S. Carbon Emissions
High-voltage direct-current transmission lines hold the key to slashing greenhouse gases.
Trump’s Five Biggest Energy Blunders in 2017
Has it really only been 11 months?