Solar investment is expanding across utility-scale projects, rooftop systems, grids and related clean-energy infrastructure. The statistics below distinguish forecasts from observed capacity, modeled economics and survey-based financing measures, with periods and geographies stated explicitly.
Key Solar Investment Statistics
The most useful headline figures span capital flows, deployment, economics, financing and employment:
- In 2025, global energy investment is forecast at $3.3 trillion worldwide.
- In 2025, clean-energy technology investment is forecast at $2.2 trillion worldwide.
- In 2025, solar investment in utility-scale and rooftop systems is forecast at $450 billion worldwide.
- In 2025, clean-energy technologies are forecast to attract about twice as much capital as fossil fuels worldwide.
- In 2024, solar PV added 451.9 GW of net generating capacity globally.
- In 2024, China added 278.0 GW of solar capacity.
- In 2024, the United States added 38.3 GW of solar capacity, 54.0% above its 2023 addition.
- In 2024, solar PV supplied about 7% of global electricity generation.
- In 2024, global solar PV generation increased by about 25% from 2023.
- In 2024, the global weighted-average installed cost of utility-scale PV was $691 per kW.
- From 2010 to 2024, utility-scale PV installed cost fell 87%, from $5,283 to $691 per kW.
- In 2024, global weighted-average utility-scale PV LCOE was $0.043 per kWh.
- In 2024, newly commissioned utility-scale PV had a weighted-average capacity factor of 17% globally.
- In 2022 survey data, utility-scale solar WACC was 8.5%–9.0% in Kenya and Senegal.
- In 2024 analysis, financing costs could represent around 50% or more of utility-scale solar LCOE in EMDEs.
- In 2023, the U.S. solar industry was estimated to support 626,100 total jobs.
- In 2023, direct U.S. solar activity was estimated to contribute $29,178.5 million in value added.
Contents
- Key Solar Investment Statistics
- Global Solar Investment and Clean-Energy Capital
- Solar Deployment and Installed-Capacity Trends
- Regional Solar Markets and Participation
- Solar Project Costs, Output and Economics
- Financing Conditions and Investment Barriers
- Solar Investment Employment and Economic Outcomes
Global Solar Investment and Clean-Energy Capital
The International Energy Agency’s 2025 outlook places solar within a much larger electricity-investment cycle. These figures are forecasts or estimates, rather than audited year-end results.
- The IEA forecasts $3.3 trillion of global energy investment in 2025, including all energy categories.
- Clean-energy technology investment is forecast at $2.2 trillion worldwide in 2025, while solar investment across utility-scale and rooftop systems is forecast at $450 billion.
- The IEA forecasts clean-energy technologies attracting about twice as much capital as fossil fuels in 2025.
- Electricity investment is forecast to be about 50% higher than spending to bring oil, gas and coal to market in 2025.
- Global spending on low-emissions power generation has nearly doubled over approximately 2020–2025, according to the IEA; the release does not provide audited endpoints for that interval.
- Electricity-grid investment is estimated at about $400 billion per year in 2025, a related infrastructure measure rather than solar-only spending.
The previous IEA investment overview estimated that power-sector solar-PV investment exceeded $500 billion in 2024. The same source expected clean-energy technologies and infrastructure to receive $2 trillion in 2024, a broader category than solar, and marked those 2024 values as estimates. World Energy Investment 2025 and Global energy investment set to rise to $3.3 trillion in 2025 amid economic uncertainty and energy security concerns provide the IEA context; see also Overview and key findings – World Energy Investment 2024.
Solar Deployment and Installed-Capacity Trends
Capacity statistics measure additions to generating assets, not the amount of capital invested. IRENA generally reports net generating capacity, so these series should not be merged with IEA direct-current estimates.
- Solar PV added 451.9 GW globally in 2024, according to IRENA.
- Global renewable-power capacity reached 4,448 GW at the end of 2024; this is all renewable power, not solar alone.
- Renewable-power capacity increased by 585 GW in 2024, a 15.1% year-over-year increase globally, including solar and other technologies.
- Asia added 327.1 GW of solar capacity in 2024.
- China added 278.0 GW, India 24.5 GW, South Korea 3.1 GW, Brazil 15.2 GW and Germany 15.1 GW of solar capacity in 2024.
- The United States added 38.3 GW in 2024, which was 54.0% above its 2023 addition.
Off-grid solar added 1.6 GW and reached 6.3 GW total in 2024 in the regions covered by IRENA, explicitly excluding Eurasia, Europe and North America. The source is Renewable Capacity Highlights 2025.
Regional Solar Markets and Participation
Generation and additions describe different dimensions of adoption. The IEA estimates that solar PV supplied about 7% of global electricity generation in 2024, while global solar generation rose about 25% from 2023.
| Market or segment | 2024 measure | Definition or caveat |
|---|---|---|
| China | Over 340 GW DC added | IEA estimate; direct-current capacity |
| European Union | Around 60 GW added | IEA estimate |
| United States | Almost 50 GW added | IEA estimate based on Renewables 2024 |
| India | Around 30 GW added | IEA rounded estimate; almost three times 2023 |
| China residential PV | 30 GW | Under 10% of China’s PV additions |
Utility-scale plants drove over 60% of China’s PV expansion in 2024. Chinese residential systems represented approximately one-fifth of annual PV additions on average from 2019–2023, but the residential market was under 10% of additions in 2024 as incentives had phased out.
The IEA estimates above are not interchangeable with IRENA’s net-capacity totals: China’s IEA figure is direct-current capacity, while IRENA’s capacity accounting uses its own net-generating-capacity methodology. The source is Electricity – Global Energy Review 2025.
Solar Project Costs, Output and Economics
IRENA’s global weighted averages show how utility-scale project economics changed over the long term. LCOE is a modeled project measure, not a household retail electricity price or a guaranteed investor return.
| Utility-scale PV measure | 2010 | 2024 | Reported change |
|---|---|---|---|
| Installed cost | $5,283/kW | $691/kW | 87% lower |
| LCOE | $0.417/kWh | $0.043/kWh | 90% lower |
| Capacity factor | 15% | 17% | 13% increase |
The 2024 global weighted-average installed cost was $691/kW, and the weighted-average LCOE was $0.043/kWh. The capacity factor for newly commissioned utility-scale PV was 17% in 2024, up from 15% in 2010; IRENA attributes the change to design, irradiance, and the mix of tracker and bifacial projects.
Solar panel costs decreased 30% over approximately 2022–2024, but that statistic concerns panels rather than complete installed systems. IEA estimates also indicate that each dollar invested in wind and solar PV in 2023 produced 2.5 times the energy output of a dollar invested approximately a decade earlier, a combined energy-output comparison rather than a financial-return measure.
IRENA reports that 91% of newly commissioned utility-scale renewable capacity in 2024 was cheaper than the cheapest new fossil alternative, but that comparison covers all renewable technologies, not PV alone. In the United States, combined solar-and-wind generation grew at a 12.3% compound annual rate from 2018–2023, which is not a solar-only growth rate.
Sources: Renewable power generation costs in 2024 – Executive summary and Overview and key findings – World Energy Investment 2024.
Financing Conditions and Investment Barriers
Capital availability does not translate evenly into solar deployment. The IEA estimates that global clean-energy investment reached $1.8 trillion in 2023, 40% above 2020, but emerging and developing economies outside China accounted for under 15% of global clean-energy investment despite representing 65% of the world’s population in the comparison context.
The IEA describes a 1.5°C pathway requirement for EMDEs outside China in which annual clean-energy investment would need to rise from $270 billion to $1.6 trillion by the early 2030s. About 50% of the required investment over the next decade would need to go to grouped priorities including solar and wind, networks, and efficient buildings and appliances; this is not a solar-only target.
- For utility-scale solar projects reaching final investment decision in 2022, surveyed EMDE cost of capital was well over twice the advanced-economy level.
- A modeled one-percentage-point reduction in cost of capital could cut EMDE clean-energy financing costs by $150 billion annually; this is not an observed saving.
- Financing costs can represent around 50% or more of utility-scale solar LCOE in EMDEs, depending on country, project and financing structure.
- An earlier IEA finance-landscape assessment estimated EMDE nominal financing costs at 700–1,500 basis points above U.S. and European values, up to seven times higher in risky segments; the range is economy-wide, not solar-only.
| Geography or comparison | Survey WACC or cost measure | Period and qualification |
|---|---|---|
| Kenya and Senegal | 8.5%–9.0% | 2022 survey; nominal post-tax WACC |
| North America or Europe | 4.7%–6.4% | 2022 survey comparison |
| South Africa and other covered EMDEs | 9.5%–11.0% | 2022 survey; covered EMDEs include Brazil, India, Indonesia, Mexico and Viet Nam |
| Africa base rates | 60%–90% of WACC | 2022 analysis; country and project variation |
| China base rates | 35% of WACC | 2022 analysis |
| Advanced economies’ base rates | 10% of WACC | 2022 analysis |
Concessional finance affects comparability across the WACC survey. Sources: Executive summary – Reducing the Cost of Capital, Bringing down the cost of capital is key to unlocking clean energy growth in emerging economies, The landscape for clean energy finance in EMDEs, and How a high cost of capital is holding back energy development in Kenya and Senegal.
Solar Investment Employment and Economic Outcomes
The Solar Energy Industries Association’s U.S. economic-impact study covers 41,232 MW of installed capacity in study year 2023. Its employment and economic results are IMPLAN estimates, not a national payroll census or a measure of investor profit.
| U.S. solar impact category | 2023 estimate | Meaning |
|---|---|---|
| Direct jobs | 276,100 | Solar-industry employment |
| Indirect jobs | 128,200 | Supplier businesses |
| Induced jobs | 221,800 | Household spending connected to solar activity |
| Total jobs | 626,100 | Direct, indirect and induced impacts |
| Direct labor income | $24,137.4 million | Modeled direct estimate |
| Direct value added | $29,178.5 million | Modeled GDP-contribution measure |
| Direct output | $47,019.6 million | Modeled gross-sales or economic-activity measure |
Residential solar represented 6,896 MW of installed capacity in the study. The report notes segment-specific exclusions, including imported-component, operations-and-maintenance and wholesale considerations, so the study’s categories should be read within its stated scope.
Source: Solar Industry Economic Impact.