On-Grid or Utility Interconnected System
This is the most common type and connects the system to the electrical grid and allows the home owners to use both – the grid’s electricity and solar energy. The unique feature of this system is that when the residents do not need power or there is excess of it, the solar panels automatically send the excess electricity produced back to the grid, thereby making it useful somewhere else. On the flip side, in the event that the solar panels are unable to produce enough power for the users (due to cloudy and stormy days, night time), the users get their electric supply from the grid.
To ensure that the users do not suffer any inconvenience when the solar panels are unable to produce power and the batteries are discharged, there is an electric generator that can be added, as part of the overall system. This generator would serve as the power source during periods of short or irregular power production and or excessive demand on the power produced.
In the world today energy prices are going north and creating imbalances in the lives of the masses. The great part about solar power is that it gives you a number of choices and provides you with the edge in dealing with the energy and its cost problems.