In 2017, the worldwide investments in renewable energy amounted to US$279.8 billion with China accounting for US$126.6 billion or 45% of the global investments, the United States for US$40.5 billion and Europe for US$40.9 billion.

Globally there are an estimated 7.7 million jobs associated with the renewable energy industries, with solar photovoltaics being the largest renewable employer

Renewable energy systems are rapidly becoming more efficient and cheaper and their share of total energy consumption is increasing.
As of 2019, more than two-thirds of worldwide newly installed electricity capacity was renewable.


The major types of renewable energy sources are,Wind, Geothermal, Ethanol,Biodiesel, Biomass, Hydropower, Solar, uranium.


1767, A Swiss scientist Horace de Saussure builded the worlds first solar collector, which was later used by Sir John Herschel to cook food during his South Africa expedition in the 1830s.

1905, Albert Einstein published his paper on the photoelectric effect together with a paper on his theory of relativity
1954 Photovoltaic technology a Solar photovoltaic (PV) devices, or solar cells, which changes sunlight directly into electricity was in the United States by Daryl Chapin, Calvin Fuller, and Gerald Pearson. they also develop a solar cell capable of converting enough of the suns energy into power to run everyday electrical equipment.

1980 Paul MacCready builds the first solar-powered aircraft—the Solar Challenger—and flies it from France to England across the English Channel. The aircraft had over 16,000 solar cells mounted on its wings, which produced 3,000watts of power.

2000 First Solar begins production in Perrysburg, Ohio, at the worlds largest photovoltaic manufacturing plant with an estimated capacity of producing enough solar panels each year to generate 100 megawatts of power.
Hydropower energy can be trace back to China during the Han Dynasty between 202 BC and 9 AD. A vertical set of Water wheel was used to power Trip hammers used in pounding and hull grain.

Some of the key developments in hydropower technology happened in the first half of the In ninteenth century. In 1827, French engineer Benoit Fourneyron developed a turbine capable of producing around 6 horsepower — the earliest version of the Fourneyron reaction turbine.
In 1849, British—American engineer James Francis developed the first modern water turbine — the Francis turbine — which remains the most widely-used water turbine in the world today. In the 1870s, American inventor Lester Allan Pelton developed the Pelton wheel, an impulse water turbine, which he patented in 1880.

In the late 1800s and early 1900s, small wind-electric generators (wind turbines) were also widely used.
Into the 20th century, Austrian professor Viktor Kaplan developed the Kaplan turbine in 1913 — a propeller-type turbine with adjustable blades.
April 1, 2020 U,S Government announces $20million investment in offshore wind resources energy characterization and technology demonstration,


  1. All buildings will be built to combine energy-efficient design and construction practices and renewable energy technologies for a net-zero energy building. In effect, the building will conserve enough and produce its own energy supply to create a new generation of cost-effective buildings that have zero net annual need for non-renewable energy.
  2. Photovoltaics research and development will continue intense interest in new materials, cell designs, and novel approaches to solar material and product development. It is a future where the clothes you wear and your mode of transportation
  3. Solar electricity will be used to electrolyze water, producing hydrogen for fuelcells for transportation and buildings can produce power that is clean and safe.

Also see https://techyrevs.com/history-of-renewable-energy-part-1/