Climate Change and Renewal Energy SS3 Solar Photovoltaic Installation & Maintenance Lesson Note

Subject: Solar Photovoltaic Installation and Maintenance 

Class: SS 3

Topic: The Role of Solar Energy in Sustainability

Understanding the “Fever” of the Earth

Before we talk about solar panels, we have to understand the problem they are trying to fix. Our planet is currently acting like it has a fever. We call this Climate Change.

Why is this happening? For over 100 years, humans have been burning “fossil fuels”—things like coal, oil, and gas—to run cars and generate electricity for our homes. When we burn these, they release “Greenhouse Gases” (like Carbon Dioxide) into the air. These gases act like a thick blanket around the Earth, trapping heat and making the world warmer.

The Results of this “Fever”:

• Irregular Weather: Rains coming at the wrong time or being too heavy.
• Heatwaves: Days becoming so hot they are dangerous for humans and crops.
• Rising Sea Levels: Melting ice at the poles causing water to swallow coastal land.

What is Sustainability?

We often hear the word “Sustainability,” but it has a very simple meaning.

Sustainability means using what we need today in a way that doesn’t “break” the world for our children and grandchildren.

If we keep burning oil and gas until they are gone, we leave the next generation with no energy and a ruined environment. That is unsustainable.

The Solution: We must switch to Renewable Energy. This is energy from sources that never run out, like the sun, the wind, and moving water. No matter how much sunlight we use today, there will be more tomorrow.

The Role of Solar in the Fight

Solar energy is the “star player” in the team of renewable energy, especially in a country like Nigeria where we have sun almost every day.

How Solar Helps the Environment:

1. Zero Emissions: Solar panels don’t have “exhaust pipes.” They create electricity silently without releasing any smoke or poisonous gases into the atmosphere.
2. Water Conservation: Traditional power plants (like coal or nuclear) use millions of liters of water to cool down their machines. Solar panels don’t need water to make power.
3. Low Impact: Solar can be installed on roofs that are already built. We don’t need to destroy forests or dig deep, messy holes in the ground to get power from the sun.

From “Consumer” to “Prosumer”

In the old way of doing things, you were just a Consumer. You waited for the big power companies to send you light, and you paid whatever they asked.

With solar energy and sustainability policies, you can become a Prosumer (Producer + Consumer).

The Sustainable Cycle:

• You produce your own clean energy on your roof.
• You use what you need during the day.
• You store the extra in batteries for the night.
• In some countries (and starting soon in parts of Nigeria), you can even sell your extra solar power back to the national grid to help your neighbors. This makes the whole community’s energy “cleaner.”

Taking Action & Practical Activity

Sustainability isn’t just a topic for a textbook; it’s a choice we make every day.

Practical Thinking Activity: Imagine two schools.

• School A uses a big diesel generator that runs for 6 hours a day. It is loud, smells like smoke, and costs ₦20,000 in fuel daily.
• School B installed solar panels 3 years ago. It is silent, the air is fresh, and they only spend money occasionally to wipe the dust off the panels.

Discussion Questions:

1. Which school is helping to stop the Earth’s “fever”?
2. If the price of diesel doubles tomorrow, which school will be in trouble?
3. As a student, what is one way you can explain the benefit of solar to someone who thinks it is “too expensive”?

Teacher’s Final Thought: Solar energy isn’t just about “light.” It is about protecting our home—the Earth—while still enjoying the comforts of modern life.