In recent years, the global electricity supply landscape has been undergoing a remarkable transformation, driven by the rapid expansion of renewable energy sources. In a recent study conducted by two senior researchers from the National Renewable Energy Laboratory (NREL), Nancy Haegel and Sarah Kurtz, tracked the shifting dynamics of global electricity generation. Their findings reveal an encouraging trend toward cleaner and more sustainable energy production, with solar photovoltaic (PV) systems leading the charge.

The Continuing Dominance of Fossil Energy

Despite the growing importance of renewables, fossil energy sources still play a dominant role in supplying the world’s electricity. In 2022, approximately 38% of global electricity came from carbon-free sources such as nuclear, hydropower, and renewables. While this percentage has remained relatively stable since 2021, the real transformation lies in the field of renewable energy.

The Rise of Solar PV

One of the most striking developments highlighted in the study is the consistent growth of solar PV as a significant player in the global energy landscape. For the second consecutive year, more than 50% of new electricity generating capacity came from solar PV systems. This surge in solar PV installations has made it the fastest-growing generation technology, with 25% of the total installed solar PV capacity added in 2022 alone. Consequently, solar PV’s contribution to global electricity generation increased from approximately 3.6% in 2021 to around 4.5% in 2022.

solar progress chart

Renewables Leading the Way

Renewable energy sources, including solar PV and wind, have spearheaded the transformation of the global electricity supply. Over the past three years, more than 80% of capacity expansions have come from carbon-free sources. Solar PV and wind, working in tandem, have contributed to over 75% of this capacity expansion. These figures underscore the pivotal role renewables are playing in shaping the future of energy production.

A Glimpse into the Future

Sarah Kurtz, a fellow at NREL’s National Center for Photovoltaics, highlights the dominance of solar in new electricity generation capacity, raising questions about the future of fossil energy expansion. As solar prices continue to reach record lows, it becomes increasingly evident that carbon-free energy sources might soon become the primary suppliers of new generation capacity.

Global Impacts of Clean Energy Investments

The positive effects of clean energy policies and investments are evident not only in the United States but also globally. Initiatives like the Inflation Reduction Act in the U.S. and the Net Zero Industry Act in the European Union, along with programs like India’s Production Linked Incentives, have contributed to a surge in clean energy technologies. While these efforts have increased the potential supply of clean energy, they have also raised concerns about market distortions and public fiscal commitments.

The Path Forward

Solar PV’s impressive growth, accounting for 56% of new electricity generating capacity in 2022, underscores its potential. However, it still represents only around 5% of global electricity generation. To achieve a sustainable energy future, substantial growth in solar and other renewables is essential. Some regions, such as California, South Australia, and Hawaii, have already demonstrated the feasibility of generating over 20% of their electricity from solar PV.

In the words of Nancy Haegel, director of the National Center for Photovoltaics at NREL, “We are witnessing the energy transformation.” The data compiled from various sources paints a compelling picture of the changing energy landscape, with solar at the forefront of this revolution.


The evidence is clear: renewable energy, particularly solar PV, is driving a monumental shift in how we generate electricity. With its sustainable and clean attributes, solar energy is not only reducing carbon emissions but also paving the way for a brighter and greener future. So, what are you waiting for? Embrace the solar revolution and be a part of the transformation toward a cleaner and more sustainable energy future. Go solar now.