LONGiBank 3.0 / OneMatrix-3440

Name: LONGiBank 3.0 / OneMatrix-3440
Brand: LONGi

Grid-ScaleAC Block

Updated Sep 28, 2026

Grid-ScaleAC BlockUpdated Sep 28, 2026

Utility-scale LONGiBank 3.0 / OneMatrix-3440 is an LFP battery energy storage system supplied as an AC block with 6.251 MWh nominal energy. It has liquid cooling, weighs 47 tonnes (103,617 lb), and operates across a 1164.8 to 1500 V DC window.

Use Cases

LONGiBank 3.0 / OneMatrix-3440 has nominal energy in the utility-scale size class. Its supported protocols include IEC 104 and IEC 61850, used in utility control systems. Together these specifications indicate use in front of the meter, directly on the electricity network.

Capabilities

LONGiBank 3.0 / OneMatrix-3440 holds about 1.82 h of storage at full power, calculated from 6.251 MWh and 3.44 MW. That configuration points to peak shaving, discharging into the hours of highest demand, and grid services, work that helps keep the electricity network running. Its AC block includes the inverter, which makes it a candidate for renewable colocation, sitting next to a wind or solar plant and sharing its grid connection.

Nominal energy

6.25MWh

Rated AC power

3.44MW

C / P rate

0.5P

What does this system typically cost?

BESSBASE.com user price estimates for LONGiBank 3.0 / OneMatrix-3440 by LONGi 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

Nominal energy

6.25MWh

Rated AC power

3.44MW

C / P rate

0.5 P

Architecture

Installation

Outdoor-capable

DC Side

Nominal DC voltage

1,331.2 V

DC voltage range

1,164.8 – 1,500 V

AC Side

AC voltage

690 V

Grid frequency

50 Hz / 60 Hz

Physical & Footprint

Dimensions (W × D × H)

6,058 × 2,438 × 2,896mm

Weight

47t

Battery Cells

Chemistry

LFP

Cell supplier

LONGi (in-house)

Lifespan

Protection

Enclosure protection

IP54IP66

Fire & safety

Thermal runaway prediction, active fire prevention, Multi-level fuse protection, AI intelligent arc fault real-time detection, 24/7 real-time online insulation monitoring

Full Specification Sheet

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Plant Round-Trip Efficiency

Duration

energy ÷ power 1.82 h

0.55C

—

State of health

new system

as-new

—

DC block

typical @1.8 h

round trip @ 1.8 h

94 %

PCS (DC/AC)

typical default

each way

97.02 %

Transformer LV/MV

typical default

each way

98.01 %

Transformer MV/HV

typical default

each way

98.01 %

Cables (all segments)

typical default

each way

98.8 %

Auxiliary power (plant's own consumption)

typical default

−4.3 pts

Plant Round-Trip Efficiency at the Point of Interconnection

82.2 %

40 %100 %

1.216MWh charged for every 1 MWh discharged

Both measured at the grid connection point. The plant's own power use is already included in the losses.

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

single unit clearance 3 m / side

101.7m² total site area · 1 × 1

1,095 ft²0.0102 ha0.025 acres16.3 m² / MWh175 ft² / MWh

Unit W × D

6.06 × 2.44 m

19.88 × 8 ft

Site envelope

12.06 × 8.44 m

39.56 × 27.68 ft

Per unit

101.7 m²

Installed energy

6.25 MWh

1 × nameplate

Units1

Per row1

Clearance between unitsShared

Shared: one 3 m aisle serves both neighbours. Dedicated: each unit keeps its own 3 m, so gaps double to 6 m.

Clearance allowance

6m per axis · 3 m per side

19.69 ft per axis · 9.84 ft per side

Single unit — matches the stored area_sqm convention.

More LONGi Systems

Vendor	System	Energy	Power	Duration	Battery Cell
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

LONGiTier-1Listed Company

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.

Production scale2-20 GWh

Company sizeMajor (10000+)

Vertical integrationMedium

BankabilityNeutral

View the full LONGi profile →

How to Read the Product Page

This profile of LONGiBank 3.0 / OneMatrix-3440 by LONGi is assembled exclusively from public data to support early-stage screening and requires additional due diligence.

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