Energy Storage: 90% Li-Ion Dominance by 2025?

The global energy storage market is projected to reach over 400 gigawatt-hours (GWh) by 2028, a staggering increase from just 20 GWh in 2020. This explosive growth underscores the fierce competition and rapid innovation defining the renewable energy storage and battery tech race. But are we truly prepared for the infrastructure demands this boom implies, or are we simply building a bigger bottleneck?

90% of New Grid Storage is Lithium-Ion: A Double-Edged Sword

The latest figures from the U.S. Energy Information Administration (EIA) reveal that approximately 90% of all new utility-scale battery storage capacity installed in 2025 across the United States utilized lithium-ion technology. This dominance is not surprising given lithium-ion’s proven track record in electric vehicles (EVs) and its relatively high energy density. I’ve seen this firsthand in discussions with utility clients in Georgia. For instance, Georgia Power’s significant investment in battery storage projects, such as the 135 MW / 260 MWh battery facility at the Plant Hatch nuclear site, almost exclusively specifies lithium-ion for its immediate deployment needs. According to a recent report by the EIA, this trend reflects a global preference for established, scalable technology despite known challenges. The U.S. Energy Information Administration (EIA) projects continued lithium-ion dominance.

My professional interpretation here is that while lithium-ion offers a quick and effective solution for grid stabilization and peak shaving, this overwhelming reliance creates a single point of failure. The supply chain for lithium, cobalt, and nickel is concentrated, making it vulnerable to geopolitical disruptions and price volatility. We saw a stark example of this in 2022 when global lithium carbonate prices surged, impacting project costs significantly. I had a client, a mid-sized independent power producer, who had to delay a 50 MW battery project in south Georgia because the initial cost estimates for battery modules became obsolete almost overnight. This isn’t just about cost; it’s about national security and energy independence. Are we truly diversifying our energy portfolio if we’re just trading one fossil fuel dependency for a mineral dependency?

Global Battery Manufacturing Capacity to Exceed 2.7 TWh by 2027: The EV Effect

Projections indicate that global battery manufacturing capacity is on track to exceed 2.7 terawatt-hours (TWh) by 2027, a monumental leap primarily driven by the insatiable demand from the electric vehicle sector. This figure, highlighted in a recent analysis by BloombergNEF, suggests an abundance of manufacturing capability. BloombergNEF’s report emphasizes the rapid expansion. While this sounds like fantastic news for renewable energy integration, it’s a deceptive number. The vast majority of this capacity is tailored for automotive applications, prioritizing power density and specific form factors that aren’t always ideal or cost-effective for stationary grid storage. We’re not seeing a corresponding boom in manufacturing lines dedicated to the larger, more robust, and often lower-cost battery formats preferred by utilities. This creates a supply squeeze; grid operators are often competing directly with automakers for cells, driving up prices and extending lead times for stationary projects.

From my perspective, this means the “race” isn’t just about innovation; it’s about allocation. Governments and industry leaders need to incentivize dedicated manufacturing for grid-scale applications. Otherwise, we risk EVs cannibalizing the battery supply needed for grid decarbonization. It’s an editorial aside, but I believe we’re underestimating the sheer logistical challenge of scaling both sectors simultaneously without significant, targeted policy intervention. The assumption that EV battery oversupply will naturally spill over into grid storage is naive; distinct product lines and supply chains are forming.

The Average Cost of Utility-Scale Battery Storage Has Dropped by 60% Since 2018: An Unprecedented Decline

Perhaps the most encouraging statistic in the battery tech race is the dramatic reduction in cost. Data from the National Renewable Energy Laboratory (NREL) shows that the average installed cost of utility-scale battery storage systems has decreased by approximately 60% since 2018. This makes renewables far more competitive against traditional fossil fuel generators, even without subsidies. NREL’s detailed cost analysis highlights this significant decline. This cost reduction is primarily due to economies of scale in manufacturing, improved battery chemistry, and increased competition among suppliers. It’s a testament to the power of technological advancement and market forces.

However, the conventional wisdom often stops there, celebrating the cost decline as the sole metric of success. I disagree with this narrow view. While the upfront cost of the battery modules themselves has plummeted, the “all-in” cost of a deployed project still faces significant non-battery expenses. Interconnection costs, permitting fees, land acquisition, and labor can add substantial overhead. I recently oversaw a 20 MW / 40 MWh project near Macon, Georgia. While the battery units themselves were surprisingly affordable compared to five years ago, the process of navigating the Georgia Public Service Commission’s approval, securing the necessary land easements along I-75, and upgrading the local substation at the intersection of Highway 49 and Interstate 75 added nearly 30% to the total project budget. These “soft costs” are not declining at the same rate as hardware, and they represent the next frontier for cost reduction if we want to accelerate deployment. Without addressing these systemic friction points, the hardware cost reductions will only take us so far.

Long-Duration Energy Storage Pilot Projects Increased by 400% Between 2023 and 2025: Beyond Lithium-Ion

A fascinating development in the energy storage sector is the surge in interest for long-duration energy storage (LDES) solutions. Between 2023 and 2025, there was a remarkable 400% increase in pilot projects globally for LDES technologies, according to the Long Duration Energy Storage Council. The LDES Council’s reports track this rapid expansion. These are systems capable of discharging for 8 hours or more, moving beyond the typical 2-4 hour duration of most lithium-ion installations. This shift signals a recognition that true grid decarbonization requires more than just short-term peak shaving; it demands solutions that can bridge multi-day renewable intermittency. Technologies like flow batteries (vanadium, iron-air), compressed air energy storage (CAES), and even thermal storage are gaining traction.

My professional take is that this trend is absolutely critical for the long-term viability of high-penetration renewables. While lithium-ion is excellent for frequency regulation and short-duration arbitrage, it simply cannot provide the seasonal or even multi-day storage needed to back up a grid powered predominantly by solar and wind. We need diverse solutions. I recall working on a proposal for a grid modernization initiative in the Southeast, where the utility’s modeling showed a clear need for 12-hour storage by 2035 to manage solar output fluctuations. Lithium-ion, at that duration, was prohibitively expensive and had too short a lifespan for the application. This is where innovation in alternative chemistries and mechanical storage really shines. The rapid increase in pilot projects suggests a healthy appetite for exploring these diverse options, which is a positive sign for the future of truly resilient grids.

Less Than 5% of End-of-Life Batteries Recycled in North America and Europe: The Looming Waste Crisis

Despite the rapid deployment of battery technologies, the back end of the lifecycle remains a significant challenge. Current estimates suggest that less than 5% of end-of-life lithium-ion batteries in North America and Europe are currently recycled. This stark figure, highlighted by organizations like Circular Energy Storage, points to a looming environmental and resource recovery crisis. Circular Energy Storage provides comprehensive market intelligence on battery recycling. The vast majority of spent batteries are either landfilled or shipped overseas, losing valuable materials like lithium, cobalt, and nickel that are essential for new battery production.

This is where I get a bit frustrated, honestly. We’re so focused on deployment and cost reduction that we’re neglecting the circular economy aspect. If we don’t build robust, scalable recycling infrastructure now, we’re simply postponing a massive waste problem and creating future resource scarcity. I recently visited a battery recycling startup in Paulding County, near Dallas, Georgia, and their operations were impressive but still small-scale. We need national and international policies that mandate recycling targets and incentivize the development of efficient, environmentally sound recycling processes. The idea that we can continue to extract virgin materials indefinitely for this energy transition is unsustainable. We must view batteries not as disposable commodities, but as valuable material banks. The “race” isn’t just about making batteries cheaper and more powerful; it’s about making them truly sustainable from cradle to grave.

The energy storage sector is experiencing unprecedented growth and innovation, driven by the imperative to integrate renewables. While lithium-ion batteries currently dominate, the future demands a diversified portfolio of solutions, robust recycling infrastructure, and a keen focus on overcoming the “soft costs” of deployment. The race is far from over; it’s just getting more interesting.