How Solar Panels Harness Clean Energy for a Sustainable Future

Solar panels can power an incredible range of applications—from a remote cabin to keeping the lights on in the international space station. But we all know solar isn’t just for providing remote power needs. 

There are virtually unlimited reasons why people choose to go solar. From energy independence to reducing energy bills to climate concerns, there’s really no “wrong” reason to install panels. And as solar panels continue to drop in price, they’ve become a competitive energy option for more and more homes and businesses.

Before we get into more details, let’s look at a high-level rundown of what happens from sun to plug in a photovoltaic system:

1. Photovoltaic cells absorb photons from the Sun and converts them to direct current (DC) electricity
   
2. An inverter transforms direct current to alternate current (AC) to power appliances
   
3. AC current travels via wire to a breaker box for distribution throughout the building
   
4. Any unused electricity flows back into the utility grid or into solar energy storage
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6. What is solar energy

7. Solar energy is the light and heat that comes from the Sun. We get this energy in ways. For example, plants use sunlight to grow. We also use heating to warm things up. Solar energy that makes electricity uses things called photons. These photons start in the middle of the Sun. They travel through different layers. Then they go flying out into space. It can take time for photons to get from the middle of the Sun to the surface. This can take from 100,000 to 50 million years. When unit finally escape from the Sun, it takes them 8 minutes to reach the Earth. When they arrive, they hit panels. This makes something called the effect happen.

   The photovoltaic efficacious occurs when solar energy hits the panels. Solar energy is really important. It comes from the Sun. We use energy to make electricity with its help. Solar energy is a part of this process.

8. The photovoltaic effect

9. A solar power system is actually good at turning photons into electrons. This is what makes it work. A solar panel takes photons. Turns them into direct current. Then this direct current is changed into alternating current so we can use it in our homes and businesses. solar battery are made from silicon. silica is a kind of material that can produce electricity. When the sun shines on the panel the photons hit the silicon atoms. Make electrons come out. This is called the photovoltaic effect.

10. A solar cell is made with two pieces of silicon put together. One piece of silicon is treated with phosphorus to make it negative. The other piece of silicon is treated with boron to make it positive. When we put these two pieces together, they make a kind of field that pushes the electrons towards the metal parts of the panel and out into the world. The photovoltaic effect is what makes all of this happen with cells, and the photovoltaic effect is really important for solar panels to work.

11. When the solar panel makes electricity, the electricity has to go. The solar panel makes a kind of electricity called DC. Most things need AC electricity. So the DC electricity from the panel has to be changed into AC electricity. Once it is changed into AC electricity, the energy from the panel can be used in many different ways.

    One common way to use the energy from the panel is to connect it to the grid. This is called a grid-tied system. The grid-tied system gets a lot of its energy from the panel during the day. If the system is big enough, it might even make more energy than it needs, so the extra electricity is sent back to the grid. At night when the sun is not shining, the person uses electricity from the utility company.

    Grid-tied systems are not perfect because they still need electricity from the utility company at night. They are a good way to save money on energy bills and help the environment. The solar panel is a thing because it makes energy from the Sun, and that is a clean way to make energy. The energy from the panel can be used for many things, and it is a good way to use solar energy.

12. Net metering

13. A major advantage of a grid-tied system is the ability to sell surplus solar energy back to the utility through a process called net metering (NEM). On cloudy days and during the night, a solar system may not produce enough energy to meet demand. The opposite is true for very sunny days: When energy use is low but production is high, panels will collect surplus energy, usually more than enough for a customer’s energy needs.

    Net metering measures electrical flow in both directions: How much energy a system draws from the utility, and how much is put in. When a solar system is overproducing, the meter actually runs backward, resulting in the utility company rewarding credits for the surplus power.

    These credits can be used to purchase energy from the utility when a solar system isn’t able to meet demand.