Solar PV Systems: Types, Components & Functions

Question 1

What is the primary purpose of a solar photovoltaic (PV) system?

Accepted Answer

To capture sunlight and convert it directly into usable electricity using semiconductor materials.

Question 2

The term 'photovoltaic' is derived from 'photo' and 'voltaic'. What do these two words signify?

Accepted Answer

'Photo' means light, and 'voltaic' refers to electricity.

Question 3

The operation of a solar PV system is based on which fundamental physical and chemical phenomenon?

Accepted Answer

The photovoltaic effect.

Question 4

What happens when photons from sunlight strike the surface of solar cells?

Accepted Answer

The semiconductor material absorbs the photons, transferring energy to the electrons within the material.

Question 5

What type of electricity is directly produced by solar panels before any conversion by other components?

Accepted Answer

Direct Current (DC) electricity.

Question 6

Which of the following is NOT one of the three main types of solar PV systems?

Accepted Answer

Standalone-hybrid solar PV systems.

Question 7

What is a defining characteristic of a grid-tied solar PV system?

Accepted Answer

It is connected directly to the public utility grid and typically does not use batteries for energy storage.

Question 8

What is a significant limitation of grid-tied solar PV systems in areas with unstable power supply?

Accepted Answer

They shut down during grid outages to prevent electricity from feeding back into the grid and endangering utility workers.

Question 9

Which statement accurately describes an off-grid solar PV system?

Accepted Answer

It operates completely independently of the public utility grid and relies on battery banks for energy storage.

Question 10

In which type of communities in Nigeria are off-grid solar PV systems particularly useful?

Accepted Answer

Remote, rural, or underserved communities where grid electricity is completely unavailable.

Question 11

What feature uniquely defines a hybrid solar PV system?

Accepted Answer

It combines the features of both grid-tied and off-grid systems by connecting to the utility grid and incorporating battery storage.

Question 12

Why are hybrid solar PV systems gaining popularity in Nigerian urban areas?

Accepted Answer

Due to frequent grid power interruptions, as they ensure an uninterrupted supply of electricity.

Question 13

What is the primary function of solar panels (photovoltaic modules) in a solar PV system?

Accepted Answer

To capture sunlight and convert it into direct current (DC) electricity.

Question 14

What is the main role of a charge controller in a solar PV system?

Accepted Answer

To regulate the voltage and current flowing from the solar panels to the battery bank, protecting batteries from overcharging and deep discharging.

Question 15

Why are batteries considered an essential component in many solar PV systems, particularly off-grid setups?

Accepted Answer

They store the DC electricity generated by solar panels for use when sunlight is unavailable.

Question 16

What is the primary function of an inverter in a solar PV system?

Accepted Answer

To convert direct current (DC) electricity into alternating current (AC) electricity for household appliances.

Question 17

Which component of a solar PV system is always located outdoors, positioned on roofs or ground racks to face the sun?

Accepted Answer

Solar panels.

Question 18

Which component is typically a small wall-mounted box with digital screens showing battery voltage and charging status, usually located indoors near the batteries?

Accepted Answer

Charge controller.

Question 19

Which component is described as a larger wall-mounted or floor-standing metal box, often featuring cooling fans, status indicator lights, and heavy cable connections?

Accepted Answer

Inverter.

Question 20

According to the lesson's component table, what is the input source and output type for an Inverter?

Accepted Answer

Input: DC from Panels or Batteries; Output: Alternating Current (AC).

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