xStorage battery energy storage system (BESS)
Industrial & CommercialAC BlockUpdated Aug 28, 2026
Eaton xStorage is an LFP battery system for commercial and industrial use, supplied as an AC block with 250 kWh nominal energy. It provides 98.8% AC round-trip efficiency. The PCS and battery use liquid cooling, and the control system uses air cooling.
Use Cases
Eaton xStorage battery energy storage system (BESS) falls within the commercial and industrial class by energy capacity and connects at 480 V, a low-voltage AC connection. It is certified to low-voltage grid connection rules (UL 1741 SA, UL 1741 SB). Together these specifications indicate use behind the meter, at a customer's own premises.
Capabilities
Its AC block includes the inverter, which points to renewable colocation, storing output from a wind or solar plant on the same site. Eaton xStorage battery energy storage system (BESS) holds about 1 h of storage at full power, calculated from 250 kWh and 250 kW, and the specifications suggest peak shaving, discharging into the hours of highest demand.
Nominal energy
0.25MWh
Rated AC power
0.25MW
Round-trip efficiency (AC)
98.8 %AC
What does this system typically cost?
BESSBASE.com user price estimates for xStorage battery energy storage system (BESS) by Eaton and similar storage systems. The ranges are LDP (Landed Duty Paid) prices per kWh that cover all expenses of delivering the goods to the buyer's premises, including production, shipping, sales margins, and import duties.
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Energy & Power
Architecture
DC Side
AC Side
Physical & Footprint
Battery Cells
Lifespan
Protection
Full Specification Sheet
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Plant Round-Trip Efficiency
The calculator estimates the full "plant" round-trip efficiency (RTE) at the point of interconnection. Some values are pre-blocked depending on information on a particular ESS. The rows that are marked "each way" are one-way efficiencies; they are applied on charge and again on discharge. We then square them. To enter a bundled PCS efficiency value, use its rated-power value, not peak. If the PCS skid already includes the LV/MV transformer, set Transformer LV/MV to 100 % so those losses are not counted twice.
More Eaton Systems
5| Compare | Logo | Vendor | System | Energy | Power | Duration | Battery Cell | Open |
|---|---|---|---|---|---|---|---|---|
| Eaton | xStorage BESSAC Block · cabinet | 1MWh | 1MWAC | — | LFP | |||
| Eaton | xStorage BESSAC Block · cabinet | 1MWh | 1MWAC | — | LFP | |||
| Eaton | xStorage BESSAC Block · cabinet | 0.75MWh | 0.75MWAC | — | LFP | |||
| Eaton | xStorage BESSAC Block · cabinet | 0.5MWh | 0.5MWAC | — | LFP | |||
| Eaton | xStorage battery energy storage system (BESS)AC Block · cabinet | 0.25MWh | 0.25MWAC | — | LFP |
About the Vendor
Founded in 1911 and based in Dublin, Ireland, Eaton entered the battery energy storage market in 2024 with its xStorage BESS for commercial, industrial, and utility-scale use. The system offers 250 to 1,000 kWh of usable energy, including containerized C20 units rated at about 1.1 MWh, and Eaton places storage within its Everything as a Grid strategy.
How to Read the Product Page
This profile of xStorage battery energy storage system (BESS) by Eaton is assembled exclusively from public data to support early-stage screening and requires additional due diligence.
Always confirm these terms and technical specifications directly with the vendor and project stakeholders. Reflect all agreed-upon details in the legal agreements before making any investment decisions.
