LONGi OneBank 3.0 is a containerized LFP battery energy storage system for utility-scale use, supplied as an AC block with 6.251 MWh nominal energy. It uses liquid cooling and reaches 99.1% AC round-trip efficiency. The system weighs 48 tonnes (105,822 lb).
Use Cases
Use in front of the meter is consistent with the specifications of LONGi OneBank 3.0. Its nominal energy places it in the utility-scale size class. It supports IEC 61850 and IEC 104, used in utility control systems.
Capabilities
An AC block with the inverter included makes LONGi OneBank 3.0 a candidate for renewable colocation, storing output from a wind or solar plant on the same site. It holds about 3.63 h of storage at full power, calculated from 6.251 MWh and 1.72 MW. That configuration points to capacity value, standing in as firm capacity when demand peaks.
Nominal energy
6.25MWh
Rated AC power
1.72MW
C / P rate
0.25P
Round-trip efficiency (AC)
99.1 %AC
What does this system typically cost?
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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.
Site Space Required
Shared: one 3 m aisle serves both neighbours. Dedicated: each unit keeps its own 3 m, so gaps double to 6 m.
Single unit — matches the stored area_sqm convention.
More LONGi Systems
6| Compare | Logo | Vendor | System | Energy | Power | Duration | Battery Cell | Open |
|---|---|---|---|---|---|---|---|---|
| LONGi | LONGiBank 3.0 / OneMatrix-3440AC Block · cabinet | 6.25MWh | 3.44MWAC | —0.5C | LFP | |||
| LONGi | LONGiBank 3.0 / OneMatrix-6880AC Block · cabinet | 6.25MWh | 6.88MWAC | —0.5C | LFP | |||
| LONGi | OneBank 3.0AC Block · 20 ft container | 6.25MWh | 1.72MWAC | —0.25C | LFP | |||
| LONGi | Hi-MO One Pro-DCDC Block · cabinet | 0.26MWh | — | 2–24hflex | LFP314 Ah · Prismatic | |||
| LONGi | Hi-MO One Pro-ACAC Block · cabinet | 0.26MWh | 0.13MWAC | 2–24hflex | LFP314 Ah · Prismatic | |||
| LONGi | Hi-MO One Pro-AC (PCSx2)AC Block · cabinet | 0.26MWh | 0.25MWAC | 2–24hflex | LFP314 Ah · Prismatic |
About the Vendor
Founded in 2000 and based in Xi’an, China, LONGi has grown from a solar PV specialist into a solar and storage provider, with 13 GWh of delivered projects across more than 120 countries. Its BESS platform uses iCCS, BMS, PCS, TMS, and EMS for commercial, industrial, and utility-scale uses, and LONGi says BloombergNEF named it a Tier 1 global energy storage maker for nine straight periods.
How to Read the Product Page
This profile of OneBank 3.0 by LONGi is assembled exclusively from public data to support early-stage screening and requires additional due diligence.
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