The solar energy is the most important basic energy in all kinds of renewable energy. By the transforming equipment, the solar radiant energy is transformed into electrical energy for using. It belongs to the technology of solar energy power generation. The transforming equipment usually deals with photoelectricity transformation using the principle of semiconductor photovoltaic effects. Therefore it is called solar energy photovoltaic technology.

　　　　　　　　　　　　　　　The principle of the photovoltaic cells (see graph 1)
　　When the light shines the surface of solar cells, a part of photons are absorbed by the silicon material. After the photon energy is transferred to the silicon atom, the electron is migrated and become the free electron gathering at two sides of P-N knot to form the potential difference. When outside key-on, under this voltage, it will be able to have current flow over the exterior circuit and output the certain power. The essence of this process is the transformation from the photon energy g into the electrical energy.

The constitution of the photovoltaic power generation system A set of basic solar power generation system is consisted of the solar cells panel, controller, inverter and storage cell.

The light bends down generating system's type
the light bends down generating system's two big classifications: Incorporation electricity generation and independent electricity generation

Grid-connected power generation system (see graph 2) The electricity generated from the solar cell phalanx is transported to the AC electric power network or to the AC loads directly through the inverter.

Independent power generation system (see graph 3) The electricity generated from the solar cell phalanx charges the storage cell, and is transformed from DC to AC by the inverter.