grid-tied, or utilityinteractive (UI),

grid-tied, or utilityinteractive (UI), grid-intertied solar-electric systems generate solar electricity and route it to the electric utility grid, offsetting a home�s or business� electrical consumption and, in some instances, even turning the electric meter backwards.
Solar Panels, generally comprising of arrays of Photovoltaic Cells, use the solar energy directly from the Sun to generate electricity for our daily use. Being environment friendly in nature, they collect the solar energy which is available in abundance on our planet and convert it using the advanced technology developed by human beings.
_______________
Solar PV | Free Electricity | Solar systems