What is the latest solar energy news?

Solar energy is having a landmark moment in 2025, with record-breaking deployment figures, aggressive cost reductions, and a wave of policy and corporate investment reshaping the global energy landscape. The sector is no longer just growing — it's accelerating, and the latest data confirms that solar is now the fastest-growing electricity source in human history.

The International Energy Agency (IEA) recently reinforced its projection that solar PV will account for the majority of new electricity capacity added globally through 2030, with 2024's deployment surpassing 450 GW — a figure that would have seemed impossible a decade ago. China remains the undisputed manufacturing and installation titan, but the United States is closing ground rapidly. The U.S. Department of Energy highlighted that domestic solar manufacturing capacity has more than quadrupled since 2022, driven in large part by Inflation Reduction Act incentives that continue to attract billions in factory investment from companies like First Solar and Qcells. Utility-scale projects in Texas, California, and the Southeast are now routinely bidding below $30/MWh — cheaper than virtually any other new generation source.

On the technology frontier, Nature Energy recently published research from the National Renewable Energy Laboratory (NREL) demonstrating perovskite-silicon tandem solar cells achieving certified efficiencies above 33% under real-world conditions — a milestone that could fundamentally shift the economics of rooftop and commercial solar within this decade. Meanwhile, long-duration solar-plus-storage projects are gaining serious traction, with developers pairing large-scale battery arrays with solar farms to deliver dispatchable, around-the-clock clean power. This combination is beginning to challenge natural gas peaker plants on pure cost grounds, a development that BloombergNEF analysts describe as a "structural turning point" for grid planning.

The critical variable to watch next is grid interconnection. Despite surging project pipelines, backlogs at U.S. and European grid operators remain a significant bottleneck — with some projects waiting five to seven years for connection approval. Regulatory reforms currently moving through FERC and the EU's permitting streamlining directive could unlock hundreds of gigawatts of stranded solar capacity. If those reforms accelerate, the next 18 months may see solar deployment figures that rewrite every existing forecast.

— Helios