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Solar micro-inverter
A solar micro-inverter, or simply microinverter, is a device used in photovoltaics that converts direct current (DC) generated by a single solar module to alternating current (AC). The output from several microinverters is combined and often fed to the electrical grid. Microinverters contrast with conventional string and central solar inverters, which are connected to multiple solar modules or panels of the PV system.
Microinverters have several advantages over conventional inverters. The main advantage is that small amounts of shading, debris or snow lines on any one solar module, or even a complete module failure, do not disproportionately reduce the output of the entire array. Each microinverter harvests optimum power by performing maximum power point tracking for its connected module.〔(Where Microinverter and Panel Manufacturer Meet Up ) Zipp, Kathleen “Solar Power World”, US, 24 October 2011.〕 Simplicity in system design, simplified stock management, and added safety are other factors introduced with the microinverter solution.
The primary disadvantages of a microinverter include a higher initial equipment cost per peak watt than the equivalent power of a central inverter, and increased installation time since each inverter needs to be installed adjacent to a panel (usually on a roof). This also makes them harder to maintain and more costly to remove and replace (O&M). Some manufacturers have addressed these issues with panels with built-in microinverters.〔(Market and Technology Competition Increases as Solar Inverter Demand Peaks ) Greentech Media Staff from GTM Research. ''Greentech Media'', USrs, 26 May 2009. Retrieved on 4 April 2012.〕
A type of technology similar to a microinverter is a power optimizer which also does panel-level maximum power point tracking, but does not convert to AC per module.
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抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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