Solar Power Covers 25% of Global Energy Growth in 2025

The world just crossed an energy threshold that seemed impossible a decade ago.

Solar power generated an additional 600 terawatt hours of electricity in 2025, reaching a total of 2,800 TWh and claiming over 8% of all global electricity generation, according to the International Energy Agency. That's more than double what solar produced just three years earlier in 2022.

The numbers tell a remarkable story. Solar covered 605 gigawatts of new renewable capacity last year, while wind added 159 GW. Together with other renewables, clean energy hit 800 GW of new capacity, marking the 23rd consecutive year that renewables broke their own expansion record.

But here's what really matters: solar met more than 25% of the world's growing energy demand in 2025. The IEA says this marks the first time any modern renewable source contributed the largest share of global energy demand growth, a historic turning point in the transition away from fossil fuels.

Low-emissions sources including solar, wind, nuclear, and hydropower together covered nearly 60% of increased global demand. Meanwhile, overall energy demand grew at a modest 1.3% year-on-year, just below the decade's average, as economies became more efficient and less energy-intensive.

Electricity demand itself surged nearly 3% year-on-year, driven by diverse uses across buildings and industry. The IEA calls this growth confirmation that the world has officially entered "the age of electricity."

The Ripple Effect

The solar boom is sparking innovation across the entire energy ecosystem. Battery storage emerged as the fastest-growing power technology, with 108 GW of new capacity deployed last year, a 40% jump from 2024.

Storage technology is also getting smarter. While most battery projects still last around two hours, an increasing number can now discharge for four hours or more, perfectly complementing solar's daily generation patterns.

Lithium-iron phosphate batteries now dominate the market at 90% of deployments, up from under 50% just five years ago. About 80% of new battery capacity went to utility-scale projects, with the rest supporting commercial and home installations.

The transformation is accelerating exactly when the world needs it most, proving that clean energy isn't just an alternative anymore but the driving force of our energy future.