The cost of converting daytime solar energy into reliable electricity at any time has dropped again. According to energy think tank Ember, as of October 2025, utility-scale battery storage outside China and the United States costs just $65 per megawatt-hour.
This means it is now economically feasible to supply solar power whenever needed. Battery costs have fallen dramatically over the past two years. Ember analyst Constantza Rangelova said, “After a 40% price drop in 2024, we are on track for another major decline in 2025. This is taking solar power usage to a whole new level.”
Research shows that the cost of battery storage has fallen to $125/kWh, making a significant impact on global long-duration utility-scale battery projects. Low-cost batteries are not only affordable but, combined with long lifespans, high efficiency, and stable revenue models, have helped reduce the Levelized Cost of Storage (LCOS) to $65/MWh.
Rangelova added, “Solar is no longer just cheap daytime electricity; it is now dispatchable power anytime. This is a game-changer for countries with rapidly growing demand and strong solar resources.”
Affordable batteries are unlocking the full potential of solar energy, providing a scalable, reliable, and cost-effective foundation for clean electricity systems worldwide.
