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Solar Energy Basic Information

Solar energy is the energy obtained by captured heat and light from the sun. Energy from the sun is referred to a as solar energy. Technology has provided a number of ways to utilize this abundant resource. It is considered a green technology because it does not emit greenhouse gases. Solar energy is a renewable energy source that harnesses the power of the sun to create electricity. As the world moves towards more sustainable energy sources, solar energy is becoming increasingly popular due to its many benefits, but it also has some drawbacks.
Solar energy is abundantly available and has been utilized since long both as electricity, and as source of heat.

How Solar Energy Generated

*The solar energy is the energy obtained by capturing heat and light from the sun. The method of obtaining electricity from sunlight is referred to as Photovoltaic method. This is achieved using a semiconductor material.
*The other form of obtaining solar energy is through thermal technologies, which gives two forms of energy tapping methods.
1. The first is Solar Concentration, which focuses solar energy to drive thermal turbines.
2. The second method is Heating and Cooling systems used in solar water heating and air conditioning, respectively.

The principle of operation for both types of solar panels, solar photovoltaic (PV) and solar thermal, is the same. They absorb the raw energy of the sun and use it to create usable energy. In solar photovoltaic systems, this is done by generating electricity. , while thermal systems are used directly to heat water or air.

How Do Solar Panel Make Electricity?


Each individual panel is constructed of a layer of silicon cells, a metal frame, a glass casing surrounded by a special film, and wiring. For maximum effect, the panels are grouped together into “arrays” (an ordered series) and placed on rooftops or in large outdoor spaces. The solar cells, which are also referred to as photovoltaic cells, absorb sunlight during daylight hours.


Within each solar cell is a thin semiconductor wafer made from two layers of silicon. One layer is positively charged, and the other negatively charged, forming an electric field. When light energy from the sun strikes a photovoltaic solar cell, it energizes the cell and causes electrons to ‘come loose’ from atoms within the semiconductor wafer. Those loose electrons are set into motion by the electric field surrounding the wafer, and this motion creates an electrical current.


You now have solar panels working efficiently to transform sunlight into electricity, but the electricity generated is called direct current (or DC) electricity, which is not the type of electricity that powers most homes, which is alternating current (or AC) electricity. Fortunately, DC electricity can easily be changed into AC electricity by a gadget called an inverter. In modern solar systems, these inverters can be configured as one inverter for the entire system or as individual microinverters attached behind the panels.


Once the solar energy has been converted from DC to AC electricity, it runs through your electrical panel and is distributed within the home to power your appliances. It works exactly the same way as the electrical power generated through the grid by your electric utility company, so nothing within the home needs to change. Since you still remain connected to your traditional power company, you can automatically draw additional electricity to supplement any solar shortages from the grid.

Advantages of Solar Energy

*Renewable energy source
*Reduces electricity bills
*Diverse applications
*Low maintenance cost
*Technology development

Disadvantages of Solar Energy

*Solar energy storage is expensive
*Uses a lot of spaces

Here are the pros and cons of solar energy:


*Renewable and Sustainable: The sun is a renewable source of energy, which means that as long as we have the sun, we will have access to solar energy. It is also a sustainable energy source because it does not release harmful pollutants into the environment.

*Low Maintenance: Once a solar panel system is installed, it requires very little maintenance, making it a low-cost option in the long run.

*Energy Independence: With solar energy, homeowners and businesses can become more energy independent, reducing their reliance on traditional power grids and potentially lowering their energy costs.

*Reduced Carbon Emissions: Solar energy produces no carbon emissions, which means it can help to reduce carbon footprints and combat climate change.


*High Upfront Cost: The initial cost of installing a solar panel system can be high, making it difficult for some homeowners and businesses to make the switch to solar.

*Weather Dependent: Solar panels require sunlight to produce energy, so they are not as effective on cloudy or rainy days.

*Limited Storage: Solar energy must be used or stored as it is produced. This means that it may not be a reliable source of energy during times of high demand, such as evenings or when there is less sunlight.

*Land Use: Solar panels require a significant amount of land to produce large amounts of energy. This can be a challenge in urban or densely populated areas.

solar energy world

Solar energy is becoming increasingly popular around the world, with many countries investing in solar energy technology. The top five countries in terms of solar energy capacity are China, the United States, Japan, Germany, and India. As the technology improves and costs continue to decrease, solar energy is expected to become even more prevalent around the world.

solar energy companies

There are many solar energy companies around the world, each with its own focus and specializations. Some of the top solar energy companies include First Solar, SunPower, Trina Solar, Canadian Solar, and JinkoSolar. These companies focus on producing solar panels and systems for both residential and commercial use, as well as providing installation and maintenance services.

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