Solar PV and Electricity generation for JSS 1

Class: JSS 1
Term: First Term
Week: 2
Age: 12 years
Duration: 45 minutes
Subject: Solar PV Installation and Maintenance
Curriculum Theme: Solar Photovoltaics System for Electricity Generation
Focal competence: Demonstrate the knowledge of Solar Photovoltaics System and safety precautions
Key competencies/values: Communication; ICT and Digital Competencies
Skills:

• Explain how a Solar Photovoltaic system generates electricity

Previous Lesson: Meaning of Solar Photovoltaics (PV)
Topic: Solar Photovoltaics (Pv) System: Solar Pv And Electricity Generation
Subject Matter: Solar PV and Electricity generation

Specific Objectives

By the end of the lesson, pupils/students should be able to:

Cognitive Domain

• Explain how a Solar Photovoltaic system generates electricity;
• Identify types of Solar Photovoltaic Modules.

Affective Domain

• Appreciate the importance of solar energy as a clean power source;
• Value the need for basic safety precautions when handling electrical components.

Psychomotor Domain

• Observe a demonstration or visual representation of a solar PV system;
• Participate in group discussions about solar PV systems.

Social Domain

• Collaborate effectively in group discussions.

Reference Materials

The following resources were used in planning this lesson:

• 2025 Revised 9 Years Basic Education Curriculum
• Relevant State Unified Scheme of Work
• Basic Technology for Junior Secondary Schools, Book 1
• The HeadTeacher Scheme of work

Instructional Materials

The teacher will teach this lesson with the aid of:

• Internet enabled Digital technological tools (e.g., projector, computer, tablet)
• Sample/Model of Solar PV system components:
  • Solar Panels
  • Inverters
  • AC & DC Converters
  • Energy storage (Battery Bank)
  • Household appliances
  • Network meters
  • Energy distributors
  • Charge Controller
  • Solar cables and accessories
• Charts showing diagrams of solar PV systems
• Pictures of various solar PV modules

Rationale for the Lesson

This lesson is essential as it introduces students to a vital renewable energy source that is becoming increasingly relevant in Nigeria. Understanding solar PV systems provides foundational knowledge for future careers in renewable energy technology and promotes awareness of sustainable living. It also helps students grasp how clean energy can power homes and communities.

Prerequisite/Previous Knowledge

Students should have basic knowledge of energy, electricity, and common energy sources from their primary school science lessons.

Lesson Content/Board Summary

Solar Photovoltaics (Pv) System: Solar Pv And Electricity Generation

What is a Solar Photovoltaic (PV) System?

A Solar Photovoltaic (PV) system is a technology that converts sunlight directly into electricity using solar panels. It is a clean and renewable source of energy. The basic terms students need to understand include:

1. Solar Panels (Modules): These contain photovoltaic cells that absorb sunlight.
2. Inverter: Converts the direct current (DC) electricity generated by solar panels into alternating current (AC) electricity, which is used by most household appliances.
3. Charge Controller: Regulates the voltage and current coming from the solar panels to prevent overcharging or deep discharging of the battery bank.
4. Battery Bank: Stores excess electricity generated by the solar panels for use when the sun is not shining (e.g., at night or on cloudy days).
5. Cables and Accessories: These connect all the components of the system.

How a Solar Photovoltaic System Generates Electricity

A solar PV system generates electricity through a process called the photovoltaic effect. This involves several steps:

1. Sunlight Absorption: Solar panels, made up of photovoltaic cells, absorb sunlight.
2. Electron Excitation: When photons (particles of light) from the sun hit the silicon material in the solar cells, they knock electrons loose from their atoms.
3. Direct Current (DC) Generation: The movement of these free electrons creates an electric current, which is direct current (DC) electricity.
4. Inversion to Alternating Current (AC): The DC electricity flows to an inverter, which converts it into alternating current (AC) electricity. AC electricity is the standard form of electricity used in homes and businesses.
5. Powering Appliances: The AC electricity can then be used to power household appliances directly.
6. Energy Storage: Any excess AC electricity generated can be sent to a charge controller, which then stores it in a battery bank for later use.
7. Distribution: In some systems, excess electricity can be fed back into the national grid through network meters and energy distributors.

Types of Solar Photovoltaic Modules

There are different types of solar PV modules, each with varying efficiencies and costs:

1. Monocrystalline Solar Panels: These are made from a single, pure crystal of silicon. They are generally the most efficient and have a uniform dark appearance, but they are also the most expensive.
2. Polycrystalline Solar Panels: These are made from multiple silicon crystals melted together. They are less efficient than monocrystalline panels but are more affordable and have a speckled blue appearance.
3. Thin-Film Solar Panels: These are made by depositing thin layers of photovoltaic material onto a substrate. They are the least efficient but are flexible, lightweight, and can be produced at a lower cost. They are often used in niche applications.

Teaching Methods/Instructional Techniques

Discussion, Demonstration, Guided Practice, Question and Answer, Explanation, Observation, Group Work, Visual Aids.

Instructional Procedures

Step 1: Introduction

Time: 5 minutes

Teaching Skill: Explaining/Questioning

Teacher’s Activity: The teacher greets the students and asks them about different sources of light and energy they know. The teacher then introduces the topic, “Solar Photovoltaics (PV) System: Solar PV and Electricity Generation,” explaining that they will learn how sunlight can be used to produce electricity.

Pupils’ Activity: Students respond to the teacher’s questions and listen attentively to the introduction of the new topic.

Learning Point: Introduction to solar energy

Step 2: Explanation of Solar PV System Components

Time: 7 minutes

Teaching Skill: Explanation/Identification

Teacher’s Activity: The teacher explains what a Solar Photovoltaic (PV) system is and highlights its basic components using charts, diagrams, or actual samples of solar panels, inverters, and batteries if available. The teacher defines key terms like solar panels, inverters, charge controllers, and battery banks.

Pupils’ Activity: Students observe the instructional materials and listen to the explanations, asking questions for clarity.

Learning Point: Solar PV system components

Step 3: Explanation of Electricity Generation Process

Time: 8 minutes

Teaching Skill: Explaining/Illustrating

Teacher’s Activity: The teacher explains step-by-step how a Solar Photovoltaic system generates electricity, from sunlight absorption by solar panels to the conversion of DC to AC electricity by the inverter, and finally to powering appliances or storing energy in batteries. The teacher uses simple language and diagrams to illustrate the photovoltaic effect.

Pupils’ Activity: Students listen carefully, follow the explanation of the process, and take mental notes.

Learning Point: Electricity generation process

Step 4: Demonstration/Visualisation of PV System Operation

Time: 7 minutes

Teaching Skill: Demonstration/Visualisation

Teacher’s Activity: The teacher demonstrates how a Solar Photovoltaic system generates electricity using a small working model, an online simulation, or a video. The teacher points out the flow of energy and the function of each component in the system. (Activity: Demonstrate how a Solar Photovoltaic system generates electricity)

Pupils’ Activity: Students observe the demonstration or video keenly, paying attention to how the system works and asking questions about the practical application.

Learning Point: PV system operation

Step 5: Group Discussion on Solar PV System Meaning

Time: 6 minutes

Teaching Skill: Facilitation/Group Work

Teacher’s Activity: The teacher divides students into small groups and asks them to discuss the meaning of a Solar Photovoltaic system and its importance. The teacher moves around to guide discussions and clarify misconceptions. (Activity: Discuss in groups the meaning of the Solar Photovoltaics system)

Pupils’ Activity: Students discuss in their groups, sharing their understanding of solar PV systems and their benefits. A representative from each group presents their findings.

Learning Point: Understanding solar PV

Step 6: Identification of PV Module Types

Time: 3 minutes

Teaching Skill: Identification/Classification

Teacher’s Activity: The teacher presents pictures or samples of different types of Solar Photovoltaic Modules (monocrystalline, polycrystalline, thin-film) and guides students to identify and differentiate them based on their appearance and characteristics.

Pupils’ Activity: Students observe the pictures/samples and identify the different types of solar PV modules as guided by the teacher.

Learning Point: Types of PV modules

Step 7: Evaluation/Review

Time: 5 minutes

Teaching Skill: Questioning/Assessment

Teacher’s Activity: The teacher evaluates the learning by asking the following questions:

1. Explain in your own words how a solar PV system generates electricity.
2. Mention two main components of a solar PV system.
3. Name two types of solar photovoltaic modules.
4. Why is solar energy considered a clean source of energy?

Pupils’ Activity: Pupils answer orally and in writing.

Learning Point: Solar PV knowledge

Step 8: Note-Taking

Time: 4 minutes

Teaching Skill: Guided Writing

Teacher’s Activity: The teacher guides pupils/students to copy the essential Board Summary notes on Solar PV systems, electricity generation, and module types into their notebooks.

Pupils’ Activity: Pupils/students copy the notes carefully into their notebooks.

Learning Point: Recording lesson notes

Step 9: Conclusion

Time: 2 minutes

Teaching Skill: Summarising

Teacher’s Activity: The teacher briefly summarises the main points of the lesson, reinforcing the concept of solar PV as a renewable energy source and its importance. The teacher encourages students to observe solar panels in their environment.

Pupils’ Activity: Students listen to the summary and ask any final questions.

Learning Point: Lesson recap

Continuous Assessment/Further Study

Type: Homework/Practice Exercise

Instruction: Answer the following questions in your notebook:

1. Draw a simple diagram of a solar PV system and label its main components.
2. Research and write a short paragraph on the advantages of using solar energy in Nigeria.
3. Identify a building in your community that uses solar panels and describe how it benefits from it.

Lesson Keywords

• Solar PV System – A system that converts sunlight into electricity.
• Solar Panels – Devices that capture sunlight and convert it into direct current (DC) electricity.
• Inverter – A device that converts DC electricity from solar panels into alternating current (AC) electricity.
• Charge Controller – A device that regulates the flow of electricity to and from the battery bank.
• Battery Bank – A collection of batteries used to store electrical energy.
• Photovoltaic Effect – The process by which light energy is converted into electrical energy in a semiconductor material.
• Monocrystalline – A type of solar panel made from a single crystal of silicon, known for high efficiency.
• Polycrystalline – A type of solar panel made from multiple silicon crystals, more affordable than monocrystalline.
• Thin-film – A type of solar panel made from thin layers of photovoltaic material, flexible and low cost.

Differentiation

For struggling learners, the teacher will provide simplified diagrams and focus on identifying the main components and the basic idea of sunlight-to-electricity conversion. They will be encouraged to draw and label a simple system. For advanced learners, the teacher will encourage them to research the efficiency differences between module types or explore the concept of grid-tied versus off-grid solar systems.

Suggested Lesson Videos

Search on YouTube for: “How Solar Panels Work for Kids JSS 1” or “Solar PV System Explained for Beginners”

Teacher Guide for Using This Lesson Plan

Before the lesson, ensure all instructional materials, especially visual aids or a model of a solar PV system, are ready. If using digital tools, test them beforehand. Begin by engaging students with questions about energy to connect with their prior knowledge. During the explanation of the PV system and electricity generation, use clear, simple language and relate concepts to everyday experiences. The demonstration in Step 4 is crucial for making the concept concrete; if a physical model is unavailable, a clear video or animation is a good substitute. Facilitate group discussions effectively, ensuring all students participate and understand the core concepts. Guide students in identifying the different types of solar modules by pointing out their distinct features. When evaluating, ensure questions directly assess the objectives. Students should copy the Board Summary notes after the main teaching points have been clarified. Conclude by reinforcing the practical importance of solar energy and encouraging further observation and inquiry.