Burns & McDonnell
burnsmcd.com
May 12, 2026 Power

Why Multiday Storage Could Be the Next Frontier for Grid Reliability

The pressures of integrating renewable energy sources and powering the exponential increase in high-demand data centers are testing the limits of traditional power systems. While short-duration lithium-ion batteries have been instrumental in managing daily energy fluctuations, other technologies may become a part of the solution.

For true grid resilience, especially during extended periods of low wind or sun, a new class of technology is emerging: multiday storage (MDS). These systems are designed to deliver power for days, not hours, providing the reliability that utilities and data center operators need to confidently navigate current power demands.

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