Reasons for out-of-stock of solar container batteries

Multiple factors are contributing to the problem, experts say, from upstream shortages in labor and equipment parts to more intermediate issues like transportation backlogs and the unavailability of shipping containers. Project developers across the country are seeing the ripple effects of supply chain constraints squeezing both the solar and storage sectors. A new analysis from energy think tank Ember shows that utility-scale battery storage costs have fallen to $65 per megawatt-hour (MWh) as of October 2025 in markets outside China and the US. At that level, pairing solar with batteries to deliver power when it’s needed is now economically viable.