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What is grid connected solar PV system & its advantages ? What is net-metering for grid-tied system?

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Let's break the term Grid-Connected Rooftop Solar PV System into three parts: Solar PV System: A system comprising of photo-voltaic (PV) modules aka solar panels which convert particles of sunlight into electricity we can use (actually Direct Current). Solar PV system is also known as solar power system. Rooftop Solar : When these solar panels are mounted or installed on the roof top of a building, this type of configuration is refereed to as rooftop solar. It could be any type of building - residential, commercial or industrial. Grid Connected Solar System is also known as Grid-Tied or On-Grid Solar System. The rest of the article is dedicated to explain what grid-connected solar is, what are its advantages and about the related concept of net metering. What is a Grid Connected Solar System?  A solar PV system lets you create electricity using solar energy. But what if you are not able to generate enough solar electricity to run all the equipment consuming ele