Burns & McDonnell
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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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