Is Solar Energy Known As

is solar energy known as

Solar energy refers to the radiant energy emitted from the sun that is harnessed by technologies like solar panels to generate electricity and provide power. The use of solar energy dates back thousands of years, with early civilizations using passive solar design techniques for heating, cooking, and drying crops. The first solar cells capable of converting sunlight directly into electricity were invented in the 19th century. In the 1970s, solar photovoltaic panels became more efficient and less costly, leading to wider adoption. Today, solar energy is one of the fastest growing renewable energy sources worldwide.

This article provides an overview of solar energy as a renewable power source. It will cover the history and growth of solar technology, the environmental benefits, how solar energy works, the costs and challenges, and the future outlook for solar power.

Solar Energy is Renewable

Solar energy is considered a renewable energy source because it comes from the sun, which will continue shining for billions of years, providing an endless supply of sunlight ( The sun produces an enormous amount of energy each day that far exceeds humanity’s energy needs. From the human perspective, the sun provides a practically endless supply of energy ( As long as the sun continues to shine, we can use solar technology like photovoltaic panels to harness the sun’s energy.

Solar Power is Considered a Renewable Energy Source

There is a broad consensus that solar power meets the criteria to be considered a renewable energy source. Most definitions of renewable energy sources include solar power ( Solar energy is able to be replenished naturally – the sun provides a constant and essentially infinite supply of sunlight. As long as the sun is shining, energy can continue to be harvested. Experts, academics, and governments around the world recognize solar power as a renewable energy source.

Solar Energy Meets Criteria for Renewable Energy

Renewable energy is defined as energy from sources that are naturally replenished on a human timescale such as sunlight, wind, rain, tides, waves, and geothermal heat ( Solar energy is considered a renewable energy source because it is replenished continuously by the sun. The amount of solar energy that reaches the Earth is enormous and dwarfs humanity’s current and projected energy needs. As long as the sun continues to shine, solar energy will remain an inexhaustible resource.

In addition to being naturally replenished, solar energy meets other common criteria used to classify renewable energy sources. Solar power is sustainable and does not deplete resources. It has a much lower environmental impact than fossil fuels. Solar energy systems can also be built and installed relatively rapidly compared to more complex sources like nuclear power. Research shows solar meets key selection criteria for renewable energy such as availability, sustainability, and environmental impact (

Comparisons to Other Renewable Sources

Solar energy has both similarities and differences compared to other major renewable energy sources like wind, hydroelectric, geothermal, and biomass (Source).

Like other renewables, solar energy comes from natural sources and does not directly emit greenhouse gases. Solar shares the advantage of being inexhaustible and more environmentally sustainable than fossil fuels. However, solar power plants require a large land footprint like wind farms.

Compared to hydroelectric and geothermal which provide continuous baseline power, solar has variability depending on sunshine and time of day. Solar and wind power are more intermittent but can still be integrated into the grid effectively. Biomass provides more consistent renewable energy but has higher emissions.

Overall, solar complements other renewable sources, and a diverse energy mix optimizes reliability. Each renewable technology has pros and cons based on the local environment and grid needs. Solar stands out for its scalability and potential to grow exponentially worldwide.

Environmental Benefits

Solar energy has minimal negative environmental impacts compared to fossil fuels like coal, oil, and natural gas. Burning fossil fuels emits greenhouse gases like carbon dioxide that contribute to climate change. Fossil fuels also produce air pollutants like sulfur dioxide, nitrogen oxides, particulate matter, and heavy metals that harm human health. In contrast, solar panels produce clean, renewable electricity without emissions. Solar energy plays a critical role in the fight against climate change and transitioning to a carbon-free energy system. According to the U.S. Department of Energy, solar energy in the United States avoided over 50 million metric tons of carbon dioxide emissions in 2019 alone. Widespread adoption of solar power will be necessary to meet climate goals and limit global temperature rise.

Solar panels require very little water to produce electricity. Fossil fuel and nuclear power plants use tremendous amounts of water for cooling and steam generation. Solar photovoltaics need only occasional cleaning. This makes solar power highly valuable in arid regions and areas prone to drought. Rooftop solar also reduces strain on electric grids during peak energy usage times, minimizing the need to fire up old, inefficient power plants that generate more pollution. Overall, solar energy provides significant environmental advantages over conventional energy sources.

Challenges and Limitations

While solar energy has many benefits, it also comes with some challenges and limitations. One major challenge is intermittency – solar power generation depends on sunlight, which varies throughout the day and seasonally. This intermittency requires developing effective storage solutions like batteries to store excess solar energy when the sun is shining and discharge it when needed (

Solar energy also has high upfront costs associated with purchasing and installing solar photovoltaic systems, which can deter adoption. The levelized cost of solar energy has dropped dramatically in recent decades, but the upfront investment remains a hurdle for many (

Solar energy has limitations in certain geographic areas as well. Solar resources are weaker in higher latitudes farther from the equator. Cloudy or foggy areas also receive less consistent sunlight for solar power generation. Urban areas can lack sufficient space for large-scale solar installations.

Growth and Future of Solar

Solar energy has experienced rapid growth over the past decade. According to a report by the International Renewable Energy Agency (IRENA), the global solar photovoltaic (PV) installed capacity grew from 40 gigawatts (GW) in 2010 to over 580 GW by 2018, increasing more than 14 fold in just 8 years.[1]

Experts predict solar capacity will continue growing rapidly in the coming decades. According to projections from the Intergovernmental Panel on Climate Change (IPCC), global solar PV capacity could reach up to 4,700 GW by 2050.[2] This growth will be driven by declining costs, improvements in efficiency, and supportive policies and incentives.

Ongoing innovations aim to further improve the performance and lower the cost of solar panels. Some key areas of solar research and development include thinner and more flexible solar films, solar paints and coatings, solar windows, and advances in solar cell materials and manufacturing.

Policies and Incentives

Government policies and incentives play a crucial role in encouraging investment in solar energy and adoption of solar power. Many countries have implemented renewable energy policies and incentives to meet climate goals and transition away from fossil fuels. According to How Policies are Driving Solar Adoption in India, government regulations of solar installation companies are essential to promoting solar energy use.

Some key policies spurring solar growth include renewable portfolio standards, which require utilities to source a portion of their electricity from renewable sources. Many governments also offer tax credits and rebates for installing solar panels or other solar systems. In the U.S., the federal solar Investment Tax Credit (ITC) provides a 26% tax credit for residential solar installations. Solar renewable energy certificates (SRECs) are another incentive allowing solar producers to sell certificates for the clean energy they generate.

While policies frequently aim to encourage solar adoption, issues like grid access, permitting, and net metering still pose challenges. Policymakers continue shaping the regulatory environment for the solar industry as it rapidly evolves and expands.


In summary, solar energy is considered a renewable energy source because it meets the key criteria of renewability. The sun’s power is endless and infinite, and solar technologies can harness this renewable power without depleting resources. Solar energy has major environmental benefits compared to fossil fuels, producing no air or water pollution and enabling a transition to clean energy. While solar comes with some challenges like intermittency and high upfront costs, innovations continue to drive down prices and improve efficiency. With supportive policies and incentives, solar power has immense potential for future growth worldwide as a sustainable energy solution. As a clean, renewable source, solar energy will play a vital role in the global transition to a green economy powered by renewables.

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