The solar power system is composed of a square array of solar cells, battery packs, charge and discharge controllers, inverters, AC power distribution cabinets, sun tracking control systems and other equipment. The functions of each part of the equipment are as follows:

1. The solar cell array of the solar power system

When the battery array is under light, the battery absorbs light energy, and the accumulation of different signs of charge appears at both ends of the battery, which generates “photovoltaic voltage”, which is the “photovoltaic effect”. Under the action of the photovoltaic effect, the two ends of the solar cell generate electromotive force to convert light energy into electric energy, which is an energy conversion device. Solar cells are generally silicon cells, which are divided into mono silicon solar panels, polycrystalline solar panels and amorphous silicon solar panels.

2. The storage battery of the solar power system

The function of the battery pack is to store the electric energy generated by the battery array of the solar power system when exposed to light and can supply power to the load at any time. The basic requirements of solar cell power generation for the battery pack used are:

(1) Low self-discharge rate

(2) Long service life

(3) Strong deep discharge capability

(4) High charging efficiency

(5) Low maintenance or free maintenance

(6) Wide operating temperature range

(7) Low price