Maximizing power production at low sunlight by solar power mini-inverters
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United States of America Patent
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May 3, 2016
Grant Date -
Sep 11, 2014
app pub date -
Mar 7, 2013
filing date -
Mar 7, 2013
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Abstract
A method and apparatus is disclosed for maximizing power production for solar power systems when there is low sunlight during sunrise, sunset, clouding, partial shading, and other low irradiance conditions. A multiple-channel solar power Mini-Inverter can work in the low power mode when there is low sunlight, take power from one solar panel to supply DC power to its internal electronic circuits, and also invert the DC power from the remaining connected solar panels to single-phase or three-phase AC power feeding to the electrical grid or powering AC loads. This invention can significantly reduce the required startup and shutdown irradiance and DC power for the solar power inverter, avoid undesirable shutdowns due to partial shading, and allow the inverter to run in power generation mode for a few more hours each day.
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