Solar power has exploded in the past decade. According to recent data, global solar photovoltaic (PV) capacity surpassed 1 terawatt in 2022 and now provides roughly 6 percent of the world’s electricity, generating over 2,100 terawatt-hours annually. To put that in perspective, solar additions have outpaced coal in recent years, and solar is now the cheapest form of new power in most major economies, according to Futurism.
Between 2014 and 2023, installed PV capacity grew around 26 percent per year, effectively doubling every three years. Forecasts are even more eye-watering: by 2027, global solar capacity is expected to grow by another terawatt, and by 2050 it could reach 4,700 gigawatts, making it the single largest source of electricity worldwide. The International Energy Agency has consistently underestimated solar’s growth, with demand continuing to outstrip even the most optimistic predictions.
That growth has been driven by plummeting costs. Utility-scale solar is now the lowest-cost electricity source in many regions, with bids as low as 1.5 cents per kilowatt-hour. Beyond cost, it’s an environmental win. After all, solar is pollution-free in use and has a small carbon footprint compared to fossil fuels. Roughly half of global solar capacity is rooftop, powering homes and businesses directly, with the rest coming from large-scale solar farms.
What’s equally important is that nearly 96 percent of new electricity capacity added worldwide in the last year came from renewables, with solar and wind leading the charge. As The New Yorker put it, the sun is having a moment, and solar is now at the centre of the energy transition.
Solar panels work by collecting sunlight through semiconductor materials, usually silicon, to produce direct current electricity. That’s then converted to usable alternating current by inverters. Whether on a rooftop or part of a sprawling solar farm, these systems operate with no moving parts and typically last 25 to 40 years before degrading significantly. This makes them low-maintenance and increasingly economical over time.
After the initial investment, the electricity they generate is essentially free. That makes solar one of the most future-proof and accessible forms of clean energy out there.
Solar energy in the UK: not bad for cloudy skies
@centricaplc Can solar help get the UK to net zero? ☀️ #NetZero #energyexplained #energytransition #drone #solarpower #solar ♬ Countless – Official Sound Studio
The UK might not seem like the most obvious solar powerhouse, but it’s quietly built up a respectable track record. As of 2025, the country had around 18 gigawatts of installed solar capacity—enough to generate about 5 percent of its annual electricity. On sunny days, solar can contribute over 30 percent of total demand.
That output comes from a mix of rooftop systems and large solar farms. About a third of installed capacity is on domestic and commercial rooftops. And even though the UK’s average solar efficiency is lower than sunnier nations, its cooler climate actually helps panels work more efficiently on clear days.
The initial surge came from the feed-in tariff scheme introduced in the 2010s, which made rooftop solar more financially appealing. Although the scheme has ended, solar installations have continued thanks to falling panel costs and growing public interest in energy resilience and self-sufficiency.
There have been some recent political tensions around large-scale projects. In places like Lincolnshire, local campaigns have pushed back against proposed solar farms and the pylons needed to connect them to the grid. As reported by The Guardian, some critics argue the focus should shift to urban and brownfield sites before taking up farmland. Still, others see this as a necessary trade-off to meet energy and climate targets.
The future of solar: challenges and potential
Globally, solar power isn’t just growing, it’s reshaping how we think about electricity. Decentralised power generation, battery storage, and smart grids are all working to smooth out the variability of solar output and make it more reliable, even when the sun’s not shining. As Time pointed out, meeting climate goals will require pairing solar with other technologies like heat pumps, hydrogen, and large-scale storage.
There are other ideas taking hold, too, such as combining solar with agriculture (known as agrivoltaics), building floating solar farms on reservoirs, or integrating panels into the materials of buildings themselves. These aren’t fringe experiments; they’re becoming part of how countries plan to meet their climate goals while making efficient use of land.
Solar energy is no longer just a niche solution or a backup for sunny days. It’s a core part of our energy systems and is only becoming more essential. With smart planning and wider adoption, we’re not just harnessing the sun. We’re building a cleaner, cheaper, and more resilient energy future around it.