Solar Energy
Solar energy is a form of renewable energy, in which sunlight is turned into electricity, heat, or other forms of energy we can use. It is a “carbon-free” energy source that, once built,
How free, really, is solar energy? Renewable-energy technologies promise to liberate us from fossil fuels. But this implies that their energy payback periods—the time it takes for a system to recover the energy used to produce it—is just as important as financial payback.
People see sunlight not as a free gift but as a daily resource. From 2021 to 2025, solar capacity grew faster than any other renewable source. China dominates installation numbers, followed by India's expanding solar zones. Europe's rooftops glitter with panels, while American companies power data centers with clean energy.
We expect the combined share of generation from solar power and wind power to rise from about 18% in 2025 to about 21% in 2027. In our STEO forecast, utility-scale solar is the fastest-growing source of electricity generation in the United States, increasing from 290 BkWh in 2025 to 424 BkWh by 2027.
Almost 70 gigawatts (GW) of new solar generating capacity projects are scheduled to come online in 2026 and 2027, which represents a 49% increase in U.S. solar operating capacity compared with the end of 2025. Much of the utility-scale solar generation capacity additions will come online in Texas.
Solar energy is a form of renewable energy, in which sunlight is turned into electricity, heat, or other forms of energy we can use. It is a “carbon-free” energy source that, once built,
Even without subsidies, renewable energy is staying competitive with power from gas and coal
Australia is generating so much solar power that it''s now giving it out for free. As The Guardian reports, residents in three of the country''s states — New South Wales, south-east
Decades of engineering assumptions, predictable inertia, dispatchable baseload generation, and slow, well-characterized system dynamics, are now eroding as wind and solar
Batteries are now cheap enough to make 24/7 solar power affordable, unlocking round-the-clock clean energy in the world''s sunniest cities.
In our STEO forecast, utility-scale solar is the fastest-growing source of electricity generation in the United States, increasing from 290 BkWh in 2025 to 424 BkWh by 2027. Almost 70
Solar power became the most affordable energy source between 2021 and 2025, with costs dropping below coal and natural gas in most regions.
Globally, we have lowered our renewable energy growth forecast for 2025-2030 by 5% compared to last year, to reflect policy, regulatory and market changes since October 2024. This
Solar electricity is now highly affordable and with recent cost and technical improvements in batteries — 24-hour generation is within reach. Smooth, round-the-clock output every hour of
Solar energy - Electricity Generation: Solar radiation may be converted directly into solar power (electricity) by solar cells, or photovoltaic cells. In such cells, a small electric voltage is
PDF version includes complete article with source references. Suitable for printing and offline reading.