Data Center Lithium-ion Batteries Market (2026-2036)

The growth of this market is mainly driven by the displacement of valve-regulated lead acid batteries in uninterruptible power supply installations, where lithium-ion offers substantially smaller footprint, longer service life and lower total cost of ownership over a facility lifetime; the scale of data centre construction associated with artificial intelligence computing, which adds protected load faster than at any previous point in the history of the sector; the multiplication of energy storage content per rack as accelerated computing raises both rack power and the severity of load transients; and the shift of power architecture toward higher voltage direct current distribution in which energy storage is specified as an architectural element rather than an accessory. In addition, the use of installed battery capacity for peak shaving and demand management where regulation permits, and the replacement cycle now arriving on the first generation of lithium installations, are further supporting the growth of this market.

The Data Center Lithium-ion Batteries Market comprises the lithium-ion battery systems installed within data centres to maintain power to critical load during a supply interruption and to support the power quality of that load. The market includes battery cabinets and rack-mounted battery strings supplied with uninterruptible power supply systems, modular battery modules and management systems, rack-level battery backup units installed within the information technology rack itself, and containerised or outdoor battery enclosures serving modular and prefabricated facilities. It covers lithium iron phosphate, nickel manganese cobalt and lithium titanate chemistries, the battery management systems, enclosures, fire detection and suppression provisions supplied with them, and the installation, monitoring, maintenance and replacement services that accompany them. The market ecosystem extends from cell manufacturers and module assemblers through uninterruptible power supply and power infrastructure suppliers to hyperscale operators, colocation providers, enterprises and the standards bodies, fire authorities and insurers whose requirements determine how much lithium may be installed within an occupied building.

The foundation of this market is a substitution that is largely settled. Valve-regulated lead acid batteries occupied several times the footprint of a lithium-ion system of equivalent capability, required replacement two or three times within a facility lifetime, and tolerated far fewer discharge cycles, so lithium-ion has displaced them in new uninterruptible power supply installations on footprint, life and total cost of ownership grounds rather than on initial price. That substitution continues in refurbishment and replacement, and it provides the base of the market independently of any growth in data centre construction.

What is changing that base is the scale and character of the load being protected. In the second quarter of 2026, ended 30 June 2026, Vertiv Holdings Co reported net sales of USD 3,274.3 million, up 24.1% year over year, with Americas net sales up 29.2% and EMEA up 1.7%, having reported a backlog of USD 15.0 billion at the end of 2025, up 109%, and guided to full-year 2026 net sales of USD 13,250 million to USD 13,750 million with organic growth of 27% to 29%. Net sales growth of 24.1% with Americas growth of 29.2%, against a backlog equivalent to more than a year of revenue, indicates that protected load is being added at a rate without precedent in the sector, and every megawatt of it requires battery capacity behind it.

More consequential than the volume is the redesign of the power architecture itself. NVIDIA has set out an 800 volt direct current data centre power architecture intended to support information technology racks of 1 MW and beyond from 2027, aligned with its Kyber rack-scale systems, in which 13.8 kV alternating current is converted directly to 800 volt direct current at the facility perimeter, 800 volt busways carry 85% more power through the same conductor size and reduce copper requirements by 45% relative to 415 volt alternating current distribution, and energy storage is included within the architecture to handle load spikes and subsecond graphics processing unit power fluctuations. Energy storage is described as part of the architecture rather than as an appliance attached to it, which is a different commercial position for a battery supplier than being specified within an uninterruptible power supply procurement.

The quantity of storage involved is rising faster than rack power. The architecture is intended to serve racks from 100 kW to beyond 1 MW, against legacy 54 volt direct current distribution reaching physical limits above approximately 200 kW, and NVIDIA has stated that its Vera Rubin NVL144 specification carries 20 times more rack-level energy storage, with current rack densities reported at 200 kW to 600 kW and above. A specification carrying twenty times more rack-level energy storage, in an architecture designed for racks an order of magnitude above present densities, describes a change in content per rack rather than a change in the number of racks, and content growth of that kind compounds with construction growth.

An important qualification applies, and it is the one most commentary on this market omits. Eaton unveiled an 800 volt direct current reference architecture developed with NVIDIA at the Open Compute Project Global Summit in 2025, incorporating supercapacitor-based ride-through storage, busbar distribution compatible with open rack standards, direct current connectors and hot-aisle containment, while Eaton and ABB are jointly defining low voltage direct current frameworks at up to 1,500 volts. At the rack, for subsecond ride-through, the function being specified is supercapacitor-based rather than lithium-ion, because the requirement is very high power for a very short duration with high cycle tolerance, which is the condition under which supercapacitors outperform cells. Lithium-ion remains the medium where minutes of autonomy are required, which is the uninterruptible power supply role at facility and row level, and it is also used in rack-level backup units where runtime rather than transient response is the requirement. The implication for forecasting is that lithium-ion does not capture every increase in rack-level energy storage, and treating the two as interchangeable overstates the opportunity.

Supplier economics in this market deserve attention because they qualify the growth story. For the fiscal year ended 31 March 2026, EnerSys reported record net sales of USD 3,751.4 million, up 3.7%, with Energy Systems segment net sales of USD 1,651.3 million, up 7.8%, and fourth-quarter Energy Systems net sales of USD 425.7 million, up 6.7%, although Energy Systems operating earnings of USD 85.3 million represented a margin of only 5.2% for the year, and the company reported advancing a lithium data centre solution in customer commissioning, with management citing strength in its data centre, communications and aerospace and defence businesses. Segment growth of 7.8% on record group sales, with operating margin of 5.2%, indicates that supplying battery systems into this demand is not yet a high-margin business, and the contrast with margins reported by power infrastructure and thermal suppliers serving the same customers suggests that value is accruing to systems and controls rather than to cells and cabinets.

Safety, standards and insurance determine how much of the theoretical opportunity can be realised. Installation standards for stationary energy storage, large-scale fire test protocols and the fire codes that adopt them govern how much lithium may be installed in a room, what separation and suppression are required, and whether an installation may share space with occupied or equipment areas. Operators and their insurers apply these requirements conservatively, and in some jurisdictions they constrain the quantity of lithium in a data hall sufficiently to affect architecture, which is why fire engineering now accompanies battery selection rather than following it.

The market includes power infrastructure and uninterruptible power supply suppliers, cell and module manufacturers and battery specialists, among them Vertiv, Schneider Electric, Eaton, ABB, EnerSys, Huawei, Delta Electronics, Samsung SDI, LG Energy Solution, CATL, BYD, Narada Power, East Penn Manufacturing, Toshiba, Legrand and Mitsubishi Electric. Participants compete on energy and power density within the available footprint, cycle and calendar life at data centre operating temperatures, safety certification and fire test evidence, battery management and monitoring integration with facility systems, compatibility with uninterruptible power supply and direct current architectures, supply security and cell sourcing, warranty terms and the balance sheet behind them, and total cost of ownership across a facility lifetime.

At the same time, the market faces challenges, including fire code and insurance constraints on the quantity of lithium permitted within occupied buildings, cell supply concentration and the trade measures affecting it, competition from supercapacitors for the rack-level transient function, the long qualification cycles operators apply to anything in the critical power path, and thin margins on cabinet and cell supply relative to the systems they sit within. As a result, suppliers that combine certified safety performance, integration with power architecture and monitoring systems, secure cell supply and credible warranty backing are expected to capture the largest share of growth over the forecast period.