THE COMPONENTS AND FUNCTION OF A PV POWER SYSTEM 

A PV power system is composed of the solar module, the solar charge controller and the storage battery on which a DC (direct current) is transmitted only. For AC (alternating current) output, an integrated inverter is necessarily into the system.

The components served as:

Solar Module ------ The highest cost part of the system converts solar energy into electric energy which then be transmitted to the battery for later consumption or to power the loads.

Solar Charger Controller------ It curbs the running condition of the whole system and protects the battery from overcharge by regulating the circuit current. It also functions, such as photo-switch and time-controlled switch as well as temperature buffering at where the temperature difference is large and optional.

The storage battery------Most of the battery used in the PV system are lead-acid  battery, and nickel hydrogen battery, nickel-cadmium battery and lithium battery are usually used at the small systems. It storages electric energy generated by the solar module and then delivers the energy when needed.

Inverter------ As a solar module outputs a direct current (DC12V\DC24V\DC48V), we need to convert a direct current into an alternating one(AC110V\AC220V) to make it possible that the loads on the grid can be powered.

 

KEY FACTS WHEN DESIGNING A SOLAR POWER SUPPLY SYSTEM:

1. Where does it project at? (for the amount of the solar radiation is great important to the whole system)

2. What’s the total power load of the system?

3. What’s the output voltage in DC\AC of the system?

4. How many hours does the system work?

5. How many days are the system working duration if there is a period of continuous rainy days?

6. What’s the specification of loads in the system (resistance\capacitance\ inductance) and how much are the starting currents of the loads?

7. How many loads are there in the system?