The State of Energy Storage: From Lithium-Ion to 100-Hour Batteries

In this week's energy market update, we explore the explosive growth of the energy storage sector, now widely recognized as the "Swiss Army knife" of the modern power grid. Ever since the Aliso Canyon gas leak in 2016 kickstarted utility-scale battery deployment, plunging lithium-ion costs—driven largely by the EV industry—have completely transformed how we balance the system.We break down the latest US Energy Storage Monitor report from Wood Mackenzie and American Clean Power, which reveals that an incredible 18.9 gigawatts (51 GWh) of storage was installed in 2025, marking a massive 52% year-over-year increase. Since 2019, the US has added over 50 gigawatts of storage to the grid.For energy professionals tracking resource adequacy and grid integration, this video covers several critical trends:Data Center Interconnection: How data centers are increasingly relying on on-site batteries to provision loads during system peaks, effectively bypassing congested grid constraints and potentially saving billions in fees.Solar Hybridization & Transmission: Why nearly half of all utility-scale solar projects are now paired with 3-hour storage to rescue low-value midday power and sell it during high-priced evening peaks. We also explore the concept of "storage as transmission" to ease regional grid congestion.Renewable Energy Droughts: As variable renewables flood the system, utility planners must now prepare for multi-day weather events—like atmospheric rivers or snowstorms—that can drastically cut solar or wind output, requiring much longer-duration backup.Beyond Lithium-Ion: We look at the commercial emergence of alternative long-duration technologies, including compressed air projects from Hydrostor, liquid CO2 systems from Energy Dome, and liquid air turbines from Highview Power.The Form Energy Disruption: Finally, we discuss how Form Energy's 100-hour iron-air batteries could drastically alter Wood Mackenzie's future forecasts. With recent massive deals announced alongside Xcel Energy, Google, and Crusoe, just two projects account for 80% of last year's total US storage additions in terms of gigawatt-hours.Join us as we explore what the next 500 gigawatt-hours of projected energy storage will look like between now and 2031Support the show🎙️ About Energy Future: Powering Tomorrow’s Cleaner World Hosted by Peter Kelly-Detwiler, Energy Future explores the trends, technologies, and policies driving the global clean-energy transition — from the U.S. grid and renewable markets to advanced nuclear, fusion, and EV innovation.💡 Stay Connected Subscribe wherever you listen — including Spotify, Apple Podcasts, Amazon Music, and YouTube.🌎 Learn More Visit peterkellydetwiler.com for weekly market insights, in-depth articles, and energy analysis.