Solar's Record-Breaking Run Continues
In its World Energy Outlook 2025, the International Energy Agency confirmed that solar photovoltaics added more new generation capacity in 2024 than all other power sources combined for the third consecutive year. By Q1 2026, IRENA's live tracking database put global cumulative installed PV capacity at roughly 3.1 terawatts (TW) โ up from 1.6 TW just three years earlier. That doubling in three years is not a statistical quirk; it reflects structural changes in manufacturing, finance, and policy that have made solar the default choice for new electricity.
The Cost Curve That Changed Everything
BloombergNEF's New Energy Outlook 2025 placed the global levelised cost of electricity (LCOE) for utility-scale solar at $28โ44 per megawatt-hour, depending on the region. In sunbelt markets โ the Middle East, northern Chile, western India โ projects are signing power-purchase agreements below $20/MWh. That is cheaper than operating a fully depreciated coal plant in most of the world.
Residential solar tells a similar story. Module prices from tier-one manufacturers JinkoSolar, LONGi, and Trina Solar have stabilised at $0.10โ0.14 per watt following the 2024 oversupply correction. Full installed system costs for a typical 8 kW rooftop system now range from $1.20/W in Australia to $2.40/W in Western Europe โ both figures that produce payback periods well under ten years in most climates.
Where Growth Is Happening Fastest
China
China remains the undisputed engine of global deployment. IRENA data shows the country added over 250 GW in 2025 alone โ more than the entire installed base of any country except itself. LONGi and Trina Solar continue to dominate module supply, while Huawei and Sungrow split roughly 60% of the global inverter market.
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India
India's PM Surya Ghar scheme, targeting 30 GW of rooftop solar, drove residential installations to record levels in 2025. The country now ranks third globally for annual additions, with analysts projecting it will overtake the EU by 2028.
United States
The Inflation Reduction Act's domestic content provisions continued reshaping supply chains into 2026. Hanwha Q-Cells' expanded Georgia facilities and First Solar's Ohio gigafactories pushed US-made module capacity past 30 GW annually.
Europe
Europe's REPowerEU targets accelerated permitting reforms. Spain, Germany, and the Netherlands led continental deployment, though grid connection queues remain a bottleneck across the bloc.
Key Technology Trends in 2026
| Technology | 2024 Market Share | 2026 Market Share | Efficiency Range |
|---|---|---|---|
| PERC (standard) | 45% | 22% | 20โ22% |
| TOPCon | 38% | 52% | 22โ24% |
| HJT (heterojunction) | 8% | 14% | 23โ25% |
| Perovskite-silicon tandem | <1% | 1โ2% | 28โ32% (lab/pilot) |
TOPCon has become the mainstream workhorse, with virtually every tier-one manufacturer now offering it as standard. HJT is growing fast in the premium segment thanks to superior low-light performance. Bifacial modules โ which generate power from both sides โ now represent over 75% of all commercial panel shipments.
The Storage Inflection Point
Solar's biggest challenge โ intermittency โ is easing. CATL, BYD, and Sonnen have all launched sub-$100/kWh residential battery systems in 2025โ26, making solar-plus-storage the standard offer rather than an upgrade. Grid-scale battery storage additions in 2025 exceeded 100 GWh globally for the first time, per BloombergNEF.
What the Next Five Years Hold
IRENA's Renewable Power Generation Costs 2025 report projects utility-scale solar LCOE will fall a further 30โ40% by 2030 as manufacturing scales and perovskite-silicon tandem cells enter commercial production. The agency's 1.5 ยฐC pathway requires 1.5 TW of new solar per year by 2030 โ a target that, for the first time, looks financially achievable without subsidy in most markets.