Solar energy has been used for thousands of years, but the technology that powers modern solar panels developed over the past two centuries. Early civilizations used sunlight for heating and lighting fires, while scientific discoveries in the 1800s made it possible to convert sunlight into electricity.
When were solar panels invented? The first photovoltaic effect was discovered by French physicist Edmond Becquerel in 1839. Charles Fritts developed an early selenium solar cell in 1883, and researchers at Bell Laboratories introduced the first practical silicon solar cell in 1954.
Since then, solar technology has evolved from powering small devices and satellites to generating electricity for homes, businesses, and entire communities.
This guide explores the history of solar energy, the inventors behind its most important breakthroughs, and how solar panels developed into one of today’s major renewable electricity technologies.
Solar Energy History Timeline: Major Milestones
| Year | Solar Energy Milestone |
|---|---|
| Ancient civilizations | Sunlight used for heating, fire-starting, and building design |
| 1767 | Horace-Bénédict de Saussure develops an early solar heat collector |
| 1839 | Edmond Becquerel discovers the photovoltaic effect |
| 1883 | Charles Fritts creates an early selenium solar cell |
| 1905 | Albert Einstein explains the photoelectric effect |
| 1954 | Bell Laboratories demonstrates the first practical silicon solar cell |
| 1958 | Vanguard 1 becomes the first solar-powered satellite |
| 1970s | Solar technology expands into remote power applications |
| 1979 | Solar thermal collectors are installed at the White House |
| 2000s–2020s | Falling costs and improved efficiency accelerate solar adoption |
The development of modern solar power took place over many generations. Scientists first discovered how light interacts with materials, engineers then developed practical photovoltaic cells, and manufacturers eventually made solar electricity accessible to a much wider market.
Early Solar Energy History
The earliest instances of harnessing solar energy are found in the seventh century BC when glass was used to light small cooking fires. In the third century, Greeks and Romans used glass and sunlight to light torches for religious purposes. There are also records in China of using solar energy and glass to light fires for religious ceremonies in 20 AD. There is an interesting story from the second century BC about solar energy. During a siege on Syracuse, the ancient Greek scientist Archimedes focused sunlight through magnifying glass to light Roman ships on fire. In the Americas, the Ancestral Puebloan peoples in the thirteenth century designed and constructed masterful cliff dwellings. These palaces were south facing in order to capture sunlight and heat the complex. In the 1700s and 1800s, sunlight was used to power ovens and even ships.
Who Invented Solar Panels?
The invention of solar panels was not the work of one person. Modern photovoltaic technology developed through several important discoveries.
Edmond Becquerel: Discovering the Photovoltaic Effect (1839)
In 1839, French physicist Edmond Becquerel discovered that light could generate an electrical current in an experimental electrochemical system. This discovery became known as the photovoltaic effect and established the scientific foundation for solar electricity.
Charles Fritts: Creating an Early Solar Cell (1883)
In 1883, American inventor Charles Fritts developed an early solar cell using selenium coated with a thin layer of gold.
The device converted only a small percentage of incoming sunlight into electricity, but it demonstrated that solid materials could be used to generate electricity from light.
Albert Einstein: Explaining the Photoelectric Effect (1905)
In 1905, Albert Einstein published research explaining the photoelectric effect, helping scientists understand how light interacts with matter.
Einstein received the 1921 Nobel Prize in Physics for his explanation of the photoelectric effect. Although this phenomenon is distinct from the photovoltaic effect, the underlying understanding of light contributed to the development of modern solar technology.
Bell Laboratories: The First Practical Silicon Solar Cell (1954)
In 1954, Bell Laboratories researchers Daryl Chapin, Calvin Fuller, and Gerald Pearson demonstrated the first practical silicon solar cell.
Their breakthrough achieved approximately 6% conversion efficiency and established the foundation for the silicon photovoltaic technology widely used in modern solar panels.
So, who invented the first solar panel? Charles Fritts is credited with creating an early solar cell in 1883, while the Bell Labs team developed the first practical silicon solar cell in 1954.
The Growth of Solar Technology
Following the development of practical silicon solar cells in 1954, researchers began exploring how photovoltaic technology could generate electricity in locations where conventional power sources were difficult to access.
One of the earliest successful applications was space exploration. In 1958, the Vanguard 1 satellite became the first satellite powered by solar cells, demonstrating that photovoltaic technology could provide electricity in orbit.
During the following decades, solar cells became increasingly important for satellites and spacecraft. Space applications helped drive improvements in solar-cell reliability, performance, and manufacturing.
By the 1970s, solar technology was also attracting greater interest for electricity generation on Earth. Concerns about energy security, combined with advances in manufacturing and government-supported research, helped accelerate the development of photovoltaic systems for terrestrial use.
The Commercialization of Solar Energy
The 1970s marked an important turning point for solar energy. Rising concerns about fossil fuel supplies encouraged governments, researchers, and manufacturers to invest in alternative energy technologies.
During this period, improvements in solar-cell manufacturing helped reduce production costs and expand the use of photovoltaic systems. Solar cells began appearing in remote applications such as navigation equipment, telecommunications systems, warning lights, and other locations where conventional electricity connections were difficult or expensive.
Solar energy also gained public attention during President Jimmy Carter’s administration. In 1979, 32 solar thermal collectors were installed on the White House roof to heat water. Although these collectors did not generate electricity like modern photovoltaic panels, they became an important symbol of growing interest in renewable energy.
Over the following decades, improvements in silicon manufacturing, panel efficiency, and large-scale production helped make photovoltaic systems increasingly practical for residential, commercial, and utility-scale electricity generation.
The Current State of Solar Power
Solar energy has grown from a specialized technology into a major source of electricity in the United States and around the world.
Improvements in manufacturing, solar-cell efficiency, and installation practices have helped reduce costs significantly compared with the earliest commercial photovoltaic systems. However, the price of a solar panel is not the same as the total cost of an installed solar energy system, which also includes equipment, labor, electrical components, permitting, and other expenses.
According to the Solar Energy Industries Association, the United States surpassed six million solar installations in 2026. Solar electricity generation has also grown substantially. The U.S. Energy Information Administration reports that utility-scale solar accounted for approximately 6.7% of utility-scale electricity generation in 2025, with additional electricity produced by residential and other small-scale solar systems.
North Carolina has become an important solar market, with substantial investment in residential, commercial, and utility-scale projects.
Today, solar panels are commonly installed on homes, businesses, schools, and large solar farms. Modern systems can also integrate with battery storage, allowing electricity generated during daylight hours to be used later when the system is appropriately configured.
These developments demonstrate how solar power has evolved from an experimental technology into an established part of the electricity system.
Solar energy is becoming more widely accepted and increasingly powering more and more buildings. In North Carolina, we were voted best local installer in North Carolina 2025 and 2026 for solar installations and are continuing to reduce our carbon footprint.
The Future of Solar Energy
Solar technology continues to evolve as researchers and manufacturers work to improve efficiency, durability, affordability, and energy storage capabilities.
Modern residential solar panels commonly achieve efficiencies above 20%, a substantial improvement over the earliest commercial solar cells. Newer technologies, including TOPCon, heterojunction (HJT), and back-contact solar cells, are helping manufacturers improve the performance of commercially available panels.
Researchers are also developing emerging technologies such as perovskite-silicon tandem solar cells, which could eventually convert more sunlight into electricity than conventional single-junction silicon cells. However, these technologies still face challenges involving durability, manufacturing, and large-scale commercialization.
Battery storage and smarter energy management systems are also expanding what solar installations can do. Properly designed systems can help homeowners use more of their solar electricity, manage energy consumption, and provide backup power during outages.
The history of solar energy shows how scientific discoveries can evolve into practical technologies. Future innovations will continue building on that foundation, helping solar power serve a growing range of residential, commercial, and utility-scale applications.
Frequently Asked Questions About the History of Solar Energy
When Was Solar Energy First Used?
People have used sunlight for heating, cooking, and building design for thousands of years. Modern solar electricity began developing after scientists discovered the photovoltaic effect in 1839.
Who Invented the First Solar Panel?
Charles Fritts developed an early selenium solar cell in 1883. The first practical silicon solar cell was introduced in 1954 by Bell Laboratories researchers Daryl Chapin, Calvin Fuller, and Gerald Pearson.
When Did Solar Panels Become Commercially Available?
Early commercial photovoltaic applications emerged in the 1950s, although solar cells were initially expensive and used mainly in specialized equipment and space technology. Broader commercial adoption developed over subsequent decades as manufacturing improved and costs declined.
When Did Solar Panels Start Being Used on Homes?
Experimental residential solar installations appeared during the 20th century, with interest expanding during the 1970s. Rooftop photovoltaic systems became increasingly common in later decades as equipment costs declined and residential solar markets developed.
What Was the First Solar-Powered Satellite?
Vanguard 1, launched in 1958, was the first satellite powered by solar cells. Its success helped demonstrate the value of photovoltaic technology for space applications.
How Have Solar Panels Improved Over Time?
Solar panels have become more efficient, reliable, and affordable. Modern residential panels commonly exceed 20% efficiency, compared with approximately 6% for the first practical silicon solar cells developed in 1954.
From Solar Energy’s Past to Your Home
The history of solar energy shows just how far renewable technology has come. What began with ancient civilizations harnessing sunlight for heat eventually evolved into the photovoltaic technology that powers homes, businesses, and communities today.
From the discovery of the photovoltaic effect in 1839 to the development of practical silicon solar cells in 1954, each breakthrough helped make solar electricity more efficient, accessible, and affordable.
Today, homeowners can take advantage of generations of solar innovation to generate their own electricity, potentially reduce long-term energy costs, and become less dependent on traditional power sources.
At 8MSolar, we help homeowners turn these technological advancements into practical energy solutions. Whether you’re exploring solar for the first time or considering an upgrade to your home’s energy system, our team can help you understand your options.
Contact 8MSolar to learn how solar energy could work for your home.