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Chapter 1
Chapter 2

Chapter 3

Chapter 4
Chapter 5
Chapter 6
Chapter 7
Chapter 8

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CHAPTER 5

Basic Block Diagram of Solar Electric System

PV Block Diagram

Basic Block Diagram of PV System

A simple solar electric system consists of five parts, as shown on figure above. The 5 parts are solar module, rechargeable batteries, control unit, distribution of electricity and electrical appliances.


Solar module is used to generate electricity from sunlight. When electricity is generated, the control unit will take part. Its function is to switch the loads manually or automatically, protect the batteries and wiring, monitor the performance of the system and give warnings when faults happen in the system. Some simpler system may not have control unit. The rechargeable batteries are connected directly to the solar module.


The rechargeable batteries are used to store electricity for later use at night and during cloudy periods. Normally, twelve-volt (12V) Lead-acid batteries, similar to the ones in cars and trucks, are used.


The distribution of electricity is direct current (DC) 12-24V. It is much less dangerous than mains voltages, which is 100-240V. Besides, its wiring is less complicated. Finally, the generated electricity can be connected to the electrical appliances. These appliances normally work in DC. They may need adaptor and inverter if work in AC.

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CHAPTER 5
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