Observing safety precautions Wearing PPE for JSS 1

Class: JSS 1
Term: First Term
Week: 10
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: Creativity and innovation; Information literacy
Skills:

• Observe the required safety precautionary measures while handling solar panels, charge controllers, batteries and inverters

Previous Lesson: Electrocution and its causes and First aid and items in a first aid box
Topic: Safety Precautions In Handling Solar Pv System Materials
Subject Matter: Observing safety precautions

Specific Objectives

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

Cognitive Domain

• state safety precautions for wearing PPE;
• state safety precautions for handling solar panels, charge controllers, batteries, and inverters.

Affective Domain

• appreciate the importance of safety in solar PV installation;
• develop a responsible attitude towards handling solar PV components.

Psychomotor Domain

• observe the required safety precautionary measures while handling solar panels, charge controllers, batteries, and inverters;
• wear the necessary PPE when working with solar panels, charge controllers, batteries, and inverters.

Social Domain

• promote a culture of safety among peers during practical activities.

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:

• PPE (Safety glasses, gloves, hard hat, safety boots)
• Solar panels (small demonstration size if possible)
• Charge controllers
• Batteries (small, safe demonstration type)
• Inverters
• Charts showing safety symbols

Rationale for the Lesson

This lesson is essential for equipping students with the foundational knowledge and practical skills to ensure their safety and the safety of others when working with solar PV systems. Understanding and observing safety precautions helps prevent accidents, injuries, and damage to expensive equipment, fostering a responsible approach to solar technology installation and maintenance.

Prerequisite/Previous Knowledge

Students should have a basic understanding of what solar PV systems are and some of their main components.

Lesson Content/Board Summary

Safety Precautions In Handling Solar Pv System Materials

Observing Safety Precautions

Observing safety precautions means taking deliberate steps to prevent harm, injury, or damage when working with tools, equipment, and materials. In solar PV installation, this involves understanding potential hazards and using appropriate protective measures.

Identification of Specific Solar PV Components

The main components of a solar PV system that require careful handling include:

1. Solar Panels: These convert sunlight into electricity. They are fragile and can be heavy.
2. Charge Controllers: These regulate the voltage and current from solar panels to the battery. They contain electronic circuits.
3. Batteries: These store electrical energy. They can contain corrosive acids and produce flammable gases.
4. Inverters: These convert DC electricity from batteries into AC electricity for household use. They contain high voltage components.

Specific Safety Rules for Handling Solar PV Components

1. Solar Panels:
   1. Handle with care to avoid breakage.
   2. Do not drop or subject to impact.
   3. Avoid touching exposed wires or terminals, especially when wet.
   4. Lift heavy panels with assistance to prevent back injury.
2. Charge Controllers:
   1. Ensure the system is de-energized before connecting or disconnecting.
   2. Follow manufacturer’s instructions for wiring.
   3. Avoid exposing to moisture or extreme temperatures.
3. Batteries:
   1. Wear appropriate PPE (gloves, safety glasses) due to corrosive electrolytes.
   2. Ensure good ventilation when working with batteries to disperse hydrogen gas.
   3. Do not smoke or use open flames near batteries.
   4. Avoid short-circuiting battery terminals.
   5. Lift heavy batteries using proper techniques or equipment.
4. Inverters:
   1. Ensure the inverter is disconnected from all power sources before servicing.
   2. Do not open the inverter casing unless qualified to do so.
   3. Be aware of residual voltage even after disconnection.

Safety Precautions for Wearing Personal Protective Equipment (PPE)

Personal Protective Equipment (PPE) are items worn to minimize exposure to hazards that cause serious workplace injuries and illnesses. For solar PV installation, common PPE includes:

1. Safety Glasses/Goggles: Protect eyes from chemical splashes, dust, and flying debris. Ensure they fit snugly.
2. Safety Gloves: Protect hands from cuts, abrasions, electrical shocks, and chemical exposure (e.g., acid from batteries). Different types of gloves are used for different hazards (e.g., electrical insulation gloves, chemical-resistant gloves).
3. Hard Hat/Safety Helmet: Protect the head from falling objects or impacts, especially when working at heights or in construction areas.
4. Safety Boots/Shoes: Protect feet from heavy falling objects, punctures, and provide electrical insulation or slip resistance.
5. Long-sleeved Shirts and Trousers: Protect skin from UV radiation, cuts, and abrasions.

Teaching Methods/Instructional Techniques

Discussion, Demonstration, Guided Practice, Question and Answer, Explanation, Observation, Practical Activity.

Instructional Procedures

Step 1: Introduction

Time: 5 minutes

Teaching Skill: Engaging/Questioning

Teacher’s Activity: The teacher greets the students and asks them about the importance of safety in everyday life, relating it to working with electrical components or tools. The teacher then introduces the topic: Safety Precautions in Handling Solar PV System Materials.

Pupils’ Activity: Students respond to the questions and listen attentively to the introduction.

Learning Point: Importance of safety

Step 2: Identification of Solar PV Components

Time: 7 minutes

Teaching Skill: Identification/Explanation

Teacher’s Activity: The teacher displays actual solar panels, charge controllers, batteries, and inverters (or pictures/diagrams) and asks students to identify them. The teacher briefly explains the function of each component.

Pupils’ Activity: Students identify the components and listen to the explanations.

Learning Point: Solar PV components

Step 3: Discussing General Safety Precautions

Time: 6 minutes

Teaching Skill: Explanation/Discussion

Teacher’s Activity: The teacher explains the general concept of observing safety precautions and why it is important when dealing with solar PV components, highlighting potential hazards like electric shock, chemical burns, or physical injury.

Pupils’ Activity: Students listen and contribute to the discussion on safety importance.

Learning Point: Importance of precautions

Step 4: Safety Precautions for Wearing PPE

Time: 7 minutes

Teaching Skill: Demonstration/Explanation

Teacher’s Activity: The teacher lists and explains the different types of PPE (safety glasses, gloves, hard hat, safety boots) and demonstrates how to wear each correctly. The teacher emphasizes the specific protection each item provides.

Pupils’ Activity: Students observe the demonstration and listen to the explanations of PPE use.

Learning Point: Proper PPE usage

Step 5: Practical Activity – Wearing PPE

Time: 5 minutes

Teaching Skill: Guided Practice

Teacher’s Activity: The teacher guides students to put on the required PPE (if available) for handling solar panels, charge controllers, batteries, and inverters, ensuring they wear them correctly.

Pupils’ Activity: Students practice wearing the PPE under teacher’s guidance.

Learning Point: Wearing PPE correctly

Step 6: Safety Precautions for Handling Solar PV Components

Time: 6 minutes

Teaching Skill: Explanation/Demonstration

Teacher’s Activity: The teacher explains and demonstrates the best practice ways of handling solar panels, charge controllers, batteries, and inverters, emphasizing techniques to prevent injury or damage. For example, how to lift a panel, avoid touching battery terminals, or ensure components are de-energized.

Pupils’ Activity: Students observe the demonstrations and listen to the safety rules for handling components.

Learning Point: Safe component handling

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. State two safety precautions for wearing PPE.
2. Mention two safety precautions for handling solar panels.
3. Why is it important to wear safety gloves when working with batteries?
4. Demonstrate how to correctly wear safety glasses.

Pupils’ Activity: Pupils answer orally and in writing.

Learning Point: Assessment of understanding

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 safety precautions and PPE 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: Summarizing

Teacher’s Activity: The teacher briefly summarizes the key safety precautions and the importance of PPE, reminding students that safety should always be the priority when working with solar PV systems.

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

Learning Point: Reinforcing safety importance

Continuous Assessment/Further Study

Type: Homework/Practice Exercise

Instruction: Answer the following questions in your notebook and draw one piece of PPE you learned about today.

1. List three types of PPE and state what each protects.
2. Explain why proper ventilation is important when working with batteries.
3. Describe one way to safely handle a solar panel.
4. Draw and label a safety glove.

Lesson Keywords

• PPE – Personal Protective Equipment
• Solar Panel – Device converting sunlight to electricity
• Charge Controller – Regulates power flow to battery
• Battery – Stores electrical energy
• Inverter – Converts DC to AC electricity
• Safety Glasses – Eye protection
• Safety Gloves – Hand protection
• Hard Hat – Head protection
• Safety Boots – Foot protection

Differentiation

For weaker learners, provide simplified diagrams of PPE and solar components, focusing on identifying two key safety items and two basic handling rules. For faster learners, encourage them to research additional safety precautions for specific solar PV components or different types of PPE used in the industry.

Suggested Lesson Videos

https://www.youtube.com/results?search_query=safety+precautions+solar+pv+jss1

Teacher Guide for Using This Lesson Plan

Before the lesson, ensure you have actual or clear visual aids for solar PV components and PPE. Emphasize the practical application of safety rules. Start by engaging students with relatable safety scenarios. Guide them through identifying components and understanding specific hazards. When demonstrating PPE, allow students to handle and wear the equipment if possible, providing immediate feedback. For handling components, use safe, de-energized examples. Encourage questions throughout the lesson to check understanding. Students should copy the Board Summary notes during the designated note-taking step. Reinforce that safety is paramount in all practical work.