When we look at modern rooftops today, glistening with sleek black silicon wafers, it is easy to view solar power as a 21st-century “space-age” technology. However, the history of solar power energy is a rich, centuries-long saga of human ingenuity. From ancient civilisations using “burning mirrors” to the high-tech solar solutions provided by Geo Green Power today, the quest to harness the sun has been a constant in human progress.
Understanding the history of solar energy helps us appreciate just how far we have come, and why solar is now the fastest-growing energy source on the planet.
Ancient Beginnings: Concentrating the Heat
The history of solar energy does not begin with electricity, but with thermal energy. As early as the 7th century BC, humans used magnifying glasses to concentrate sunlight to start fires. By the 3rd century BC, the Greeks and Romans were using “burning mirrors” (concave mirrors) to light torches for religious ceremonies.
One of the most famous stories in the history of solar power is that of Archimedes. Legend has it that he used a series of bronze shields to reflect sunlight onto invading Roman ships, setting them ablaze. While historians debate the validity of this specific event, it proves that the concept of solar concentration was well-understood over 2,000 years ago.
By the 1st through 4th centuries AD, Roman architecture integrated “solar rooms”, south-facing windows designed to trap heat, a precursor to modern passive solar design used in new builds today.
The 19th Century: The Discovery of the Photovoltaic Effect
The pivotal moment in the history of solar power occurred in 1839. French physicist Edmond Becquerel, at just 19 years old, discovered the “photovoltaic effect” while experimenting with an electrolytic cell made of two metal electrodes placed in an electricity-conducting solution. He noticed that the cell produced more electricity when exposed to light.
While Becquerel laid the groundwork, it took several more decades for others to build upon it:
1873: Willoughby Smith discovered the photoconductivity of selenium.
1876: William Grylls Adams and Richard Evans Day proved that selenium could generate electricity directly from light without moving parts.
1883: Charles Fritts created the first genuine solar cell using selenium wafers coated with a thin layer of gold. However, its efficiency was less than 1%, making it impractical for energy production.
The 1950s: The Birth of the Silicon Era
If you want to know the history of solar energy in its modern form, you have to look at 1954. This was the “Eureka” moment. Scientists at Bell Labs, Daryl Chapin, Calvin Fuller, and Gerald Pearson realised that silicon was far more efficient than selenium.
They created the first silicon photovoltaic (PV) cell capable of converting enough sunlight into power to run everyday electrical equipment. Although it only had an efficiency of about 6%, the New York Times heralded it as “the beginning of a new era.”
Solar Goes to Space
Because early solar cells were incredibly expensive, they weren’t used for homes. Instead, they found a home in the Space Race. In 1958, the Vanguard I satellite became the first spacecraft to use solar cells to power its radio. This proved that solar was reliable in harsh environments, a legacy that continues today in the high-durability panels installed by Geo Green Power.
The 1970s to 1990s: Commercialisation and Crisis
The history of solar power energy took a sharp turn during the 1970s energy crisis. As oil prices soared, Western governments began investing heavily in renewable research.
Dr. Elliot Berman, with financial backing from Exxon, designed a significantly cheaper solar cell by using lower-grade silicon and different packaging. This dropped the price from $100 (£72.87) per watt to $20 (£14.57) per watt. This era saw solar being used for remote applications where running power lines was impossible, such as:
- Navigational buoys
- Lighthouse signals
- Remote telecommunication towers
By the 1980s and 90s, solar began appearing on consumer goods like calculators and watches, further normalising the technology in the public eye.
The 21st Century: The Solar Revolution
Since the turn of the millennium, the history of solar energy has been defined by exponential growth and plummeting costs. Massive improvements in manufacturing, particularly in the commercial sector, have made solar the cheapest form of new electricity generation in history.
Today, solar installations are no longer reserved for satellites or remote buoys. They are essential components of the UK’s energy grid. Modern panels now boast efficiencies of 20% to 24%, and with the addition of battery storage, solar is now a 24/7 energy solution.
The Future: Your Place in Solar History
The history of solar power is still being written, and today, you have the opportunity to be part of it. We have moved from the “experimental” phase into the “essential” phase. Whether you are a homeowner or a developer, technology is now more accessible and efficient than ever before.
At Geo Green Power, we are proud to be a modern chapter in this long story. We combine the centuries of scientific progress mentioned above with cutting-edge engineering to provide systems that last for decades.
Why Choose Geo Green Power for Your Solar Journey?
Expertise: We understand the technical evolution of PV cells, ensuring we only install the highest-performing hardware.
Comprehensive Service: From initial design to long-term solar maintenance and servicing, we handle the entire lifecycle of your system.
Future-Proofing: We integrate the latest in battery storage and EV charging to ensure your investment stays relevant for the next 25 years.
From Ancient Mirrors to Modern Rooftops
In the history of solar energy, we see a timeline of humans learning to cooperate with nature rather than just consuming its finite resources. We have moved from using the sun to start a fire to using the sun to power a global digital economy.
The pioneers of the 19th century could only dream of the efficiency we achieve today. Now, it is your turn to harness that power. Whether you are looking to reduce your carbon footprint, gain energy independence, or future-proof a commercial property, the history of the sun is on your side.
Make History with Your Own Solar Installation
Ready to join the solar revolution? Don’t leave your energy future to chance. Partner with a team that knows the past, present, and future of renewable energy.
[Contact Geo Green Power Today for a Free Site Survey and Quote]
