Providing electricity from solar sources throughout the entire day, including nighttime hours, is no longer a utopia. A recent study by the think tank Ember reveals that, thanks to advancements in storage systems and decreasing costs, this goal is now achievable and cost-effective.
The crucial contribution of batteries
The Ember report highlights how the combination of photovoltaic systems and batteries allows for a constant and clean supply of energy even during sunless hours. In particular, in high-irradiation locations like Las Vegas, a 5 kW system with a 17 kWh battery can deliver a stable 1 kW for 24 hours a day.
Towards 24/365 solar electricity
According to the analysis, the sunniest areas of the planet can cover up to 97% of annual energy needs solely with solar power, achieving a steady supply every hour of the year. This level of self-sufficiency is now economically advantageous, with costs starting from 104 dollars per MWh—less than coal and nuclear, and 22% cheaper than in 2024.
Implications for industries and emerging economies
The possibility of accessing stable solar energy is particularly significant for high-demand sectors such as data centers and manufacturing. Furthermore, it opens up new opportunities for the development of renewable-powered industrial zones in regions far from existing grids, reducing infrastructure costs and enhancing grid efficiency.
A revolution ready to take off
With rapidly decreasing prices and growing adoption, the solar-plus-storage model is emerging as the new norm for clean energy. However, in order for the sector to fully develop, energy policies must adapt by integrating continuous solar generation into market planning and infrastructure strategies. As Kostantsa Rangelova of Ember states, this is a true turning point in the energy transition: it is no longer a technical dream, but an economic and strategic reality.