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.
From solar-absorbing granite facades that help regulate indoor temperatures to photovoltaic-embedded limestone pathways that generate electricity, these innovations are transforming passive stone surfaces into active energy contributors.