Photovoltaic systems directly convert solar energy into electrical energy using solar panels which are made of groups of solar cells called solar modules that work on the photoelectric effect. There are two main types of solar electric systems: standalone systems that use solar panels and batteries for off-grid power in rural areas without utility access, and grid-tie systems that are useful for homes already connected to the electric grid and can feed power to the grid using an inverter. While solar energy is renewable and non-polluting, current solar cells have low efficiency, solar energy is only available during the day, and solar cells can be expensive.

5. ≠ Photovoltaic :
• Converting solar energy directly into electrical
energy.
• Devices used are called solar panels.
• Solar panel is a group of solar cells and which
is called solar modules
• solar cell work on the principle of photo
electric effect.

7. The Types of Solar Electric Systems
• The Stand Alone System
Standalone, or off-grid, solar power systems
consist of solar panels and a battery bank.
Used in rural areas and regions where there is no
access to the utility grid.
Very good at giving economical electricity.
• Grid-Tie Solar System
 Very useful for homes that are already linked to
the utility grid.
Primary advantage is the cheap price of utility.
The system needs to be wired with an inverter
that creates ac electricity, which is needed for
linking to the utility grid.

13. Advantages:
> It is a renewable energy
> It is non-polluting
> It does not produce any noise
Disadvantages:
> Solar energy is highly diffuse
> Currently, the efficiency of solar cells is very
less
> Solar energy is not available at night
> Solar cells are very expensive

14. The End