Page 163 - CITS - Electronic Mechanic - TT - 2024

ELECTRONICS MECHANIC - CITS

Solar photovoltaic systems
A photovoltaic system, also called a PV system or solar power system, is an electric power system designed
to supply usable solar power by means of photovoltaics It consists of an arrangement of several components,
including solar panels to absorb and convert sunlight into electricity, a solar inverter to convert the output from
direct to alternating current, as well as mounting, cabling, and other electrical accessories to set up a working
system. It may also use a solar tracking system to improve the system’s overall performance and include an
integrated battery.

Advantages of photovoltaic systems
1 High reliability: Photovoltaic systems are still highly reliable even under harsh conditions. Photovoltaic arrays
ensure continuous, uninterrupted operation of critical power supplies.
2 Strong persistence: Most modules in a PV system have a warranty period of up to 25 years and remain
operational even after many years.
3 Low maintenance costs: Photovoltaic systems require only regular inspections and occasional repairs,
which are extremely low cost compared to conventional fuel systems.
4 Zero fuel consumption: Photovoltaic systems do not require fuel and can eliminate associated procurement,
storage and transportation costs.
5 Noise pollution is small: The photovoltaic system can operate quality with minimum mechanical movement.
6 There is photovoltaic supervision: In order to improve energy efficiency, photovoltaic systems may need to
add some modules.
7 Strong security: Photovoltaic systems do not require fuel and can be safely operated after proper design and
installation.
8 Strong independence: The reason for adopting this new technology in many residential areas is that
photovoltaic systems maintain the independence of energy production and are therefore unaffected by utilities.
Disadvantages of photovoltaic systems

1 High startup cost
Each PV installation should be economically evaluated and compared to existing alternatives. At present, the
construction cost of photovoltaic systems is relatively high, but with the reduction of photovoltaic system
Construction costs and the rise of traditional energy prices, photovoltaic systems will have strong economic
competitiveness.
2 Available solar radiation instability
For any solar system, weather changes will greatly affect the amount of electrical energy output. Therefore, the
system design needs to be adjusted according to changes in climate and location.
3 Have energy storage requirements
Some photovoltaic systems use batteries as energy storage devices. This increases the footprint, cost and
complexity of the system.

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CITS : E & H - Electronics Mechanic - Lesson 90 - 93