Solar power has surged from supplying 1% of global electricity in 2015 to roughly 10% today, outpacing nuclear generation and growing faster than any other energy source this century. Worldwide capacity reached approximately 2,900 gigawatts in 2025, and if current expansion rates continue, installations could hit 9,000 gigawatts by 2030, meeting over 20% of planetary energy demand. This rapid growth positions solar as the dominant force in the global energy transition.
The implications of this shift are profound. Solar's scalability and declining costs have made it the cheapest source of electricity in many regions, driving a massive buildout of solar farms and rooftop installations. As companies like Vision Marine Technologies Inc. (NASDAQ: VMAR) also make progress in transforming maritime transport to run on electricity instead of fossil fuel, the electrification of transport sectors further boosts demand for clean power.
This growth is not just about electricity generation; it represents a fundamental change in how energy is produced and consumed. Solar's intermittent nature has spurred advances in energy storage and grid management, enabling higher penetrations of renewable energy. The International Energy Agency has repeatedly revised up its solar forecasts, and many analysts now see solar becoming the largest source of electricity by the mid-2030s.
For investors and policymakers, the message is clear: solar is no longer an alternative energy source but a mainstream one. The shift has implications for traditional utilities, fossil fuel companies, and the broader economy. Jobs in solar installation and manufacturing are growing rapidly, while coal and natural gas plants face increasing economic pressure.
As solar continues its exponential growth, the challenge will be integrating such large amounts of variable generation into grids designed for baseload power. However, the momentum behind solar is undeniable, and its dominance among energy sources is now established.
