Solar Energy Statistics 2026

Solar energy in 2026: the numbers that matter

Solar is no longer a niche technology — it is the fastest-growing source of electricity on the planet and the cheapest source of new power in most markets. This roundup collects the headline figures on global solar capacity, cost, generation share, efficiency and environmental impact, each one attributed to a reputable body so you can cite it with confidence. Figures reflect the most recent confirmed full-year data (mostly 2024), framed for 2026.

If you are weighing solar for your own home, it helps to pair these macro numbers with practical guides such as how many panels you need and the wider solar basics hub.

Global capacity and growth

• The world passed roughly 2.2 terawatts (TW) of cumulative installed solar capacity by the end of 2024 (IEA-PVPS, 2025).
• Solar added a record about 600 GW of new capacity in 2024, up from 456 GW in 2023 (IEA-PVPS, 2025).
• Solar accounted for roughly three-quarters of all renewable capacity added globally in 2024 (IRENA, 2025).
• China alone holds around 1 TW of operating solar capacity, close to half the global total, followed by the EU and the United States (IEA-PVPS, 2025).

Solar's share of electricity

• Solar supplied 6.9% of global electricity in 2024, up from about 5.6% the year before (Ember, 2025).
• Global solar generation exceeded 2,000 TWh for the first time in 2024, having doubled in just three years (Ember, 2025).
• Solar was the fastest-growing power source for the 20th year running, up about 29% in 2024 (Ember, 2025).
• Renewables together reached over 40% of global electricity in 2024, with solar the largest single contributor of new supply (Ember, 2025).

The cost decline

• The global average levelised cost of electricity (LCOE) for utility-scale solar fell to about $0.043/kWh in 2024, roughly a 90% drop since 2010 (IRENA, 2025).
• The total installed cost of utility-scale solar dropped to around $691/kW in 2024, an 87% decline from 2010 (IRENA, 2025).
• Module and inverter cost reductions drove about 60% of that total cost decline over 2010-2024 (IRENA, 2025).

These curves are the single biggest reason solar deployment keeps accelerating: new solar now routinely undercuts new fossil-fuel generation on cost alone.

Residential and rooftop adoption (US angle)

• The United States installed nearly 50 GW of new solar in 2024, its largest annual addition and about 66% of all new US generating capacity (SEIA / Wood Mackenzie, 2025).
• The US residential segment added 4.7 GW in 2024, down 32% year on year amid high interest rates and policy uncertainty (SEIA / Wood Mackenzie, 2025).
• The US passed 6 million cumulative solar installations in early 2026, with roughly 7% of US homes now equipped with solar (SEIA, 2026).

Choosing between panel types still matters at the household level — see monocrystalline vs polycrystalline panels — and even renters increasingly explore balcony solar.

Panel efficiency trends

• Today's best commercial silicon modules exceed 24% efficiency, up from roughly 15% a little over a decade ago (NREL, 2025).
• Record lab cell efficiencies sit far higher, with multi-junction concentrator cells verified above 47% and tandem perovskite-silicon devices steadily climbing (NREL, 2025).
• Steady efficiency gains mean more output per square metre of roof, shrinking the footprint needed for a given system.

Environmental impact

• The energy payback time of a modern utility-scale system is roughly 0.6 to 1.2 years — the panels generate the energy used to make them many times over across a 25-to-30-year life (NREL, 2024).
• Life-cycle greenhouse-gas emissions for solar are about 10 to 40 g CO2-equivalent per kWh, a small fraction of coal or gas (NREL / IEA-PVPS, 2024).

Methodology and sources

The figures above are drawn from primary statistical reports and peer-reviewed life-cycle assessments, not secondary aggregators. Capacity and deployment data come from the IEA Photovoltaic Power Systems Programme (IEA-PVPS) and IRENA; generation-share data from Ember's Global Electricity Review; cost data from IRENA's Renewable Power Generation Costs; US market data from SEIA and Wood Mackenzie; efficiency data from NREL's cell-efficiency records; and environmental data from NREL and IEA-PVPS life-cycle work. Where a single precise figure was not firmly established, we used the value or range reported by these bodies rather than estimating. Each statistic names its source inline so it can be traced and verified.

Frequently asked questions

How much solar capacity is installed worldwide? About 2.2 TW of cumulative solar capacity was installed by the end of 2024, after a record year of roughly 600 GW of additions (IEA-PVPS, 2025).

What share of global electricity comes from solar? Around 6.9% in 2024, with solar the fastest-growing major power source and total generation passing 2,000 TWh (Ember, 2025).

How much has solar cost fallen? The utility-scale solar LCOE fell about 90% between 2010 and 2024, to roughly $0.043/kWh globally (IRENA, 2025).

How efficient are modern solar panels? The best commercial silicon modules now exceed 24% efficiency, while record lab cells reach far higher (NREL, 2025).

Bottom line

Solar has moved from the margins to the mainstream: more than 2 TW installed, the cheapest new power in most of the world, the fastest-growing electricity source for two decades, and an environmental footprint repaid within a year or two of operation. Those are the numbers worth citing in 2026. For practical next steps, start with the solar basics hub.

Last updated June 2026. Figures are the latest available at publication and will be updated as new annual statistics are released by the IEA, IRENA, Ember, SEIA and others.