CRRC Zhuzhou Institute

CESS-L6901-EU-0.5C

Grid-ScaleDC BlockContainerized

Updated Aug 14, 2026

Grid-ScaleDC BlockContainerizedUpdated Aug 14, 2026

CRRC Zhuzhou Institute CESS-L6901-EU-0.5C is an LFP battery energy storage system with 6.901 MWh nominal energy and about a 2-hour duration. It is supplied as a containerized DC block with liquid cooling. The system uses 287 Ah prismatic cells and weighs 48 tonnes (105,822 lb).

Use Cases

Use in front of the meter is consistent with the specifications of CRRC Zhuzhou Institute CESS-L6901-EU-0.5C. Its energy capacity is within the utility-scale range. It supports IEC104 and IEC61850, used in utility control systems.

Capabilities

Its shortest listed configuration is 2 h, which makes CRRC Zhuzhou Institute CESS-L6901-EU-0.5C a candidate for peak shaving, cutting the power drawn from the grid at peak times, grid services, support for the operation of the electricity network, and capacity value, counting as firm supply toward a network's peak needs. Its DC block connects through a separate inverter and points to renewable colocation, sitting next to a wind or solar plant and sharing its grid connection.

Nominal energy

6.9MWh

Duration

2hour

C / P rate

0.5C

What does this system typically cost?

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Energy & Power

Nominal energy
6.9MWh
Duration
2 hour
C / P rate
0.5 C

Architecture

Installation
Outdoor-capable

DC Side

DC voltage range
1,081.6 – 1,497.6 V

AC Side

Physical & Footprint

Dimensions (W × D × H)
6,058 × 2,438 × 2,896mm
Weight
48t

Battery Cells

Chemistry
LFP
Cell capacity
287 Ah
Cell format
Prismatic
Cell supplier
Hithium

Lifespan

Protection

Enclosure protection
IP55
Fire & safety
Fire alarm panel, heat and smoke detection, alarm bell and strobe, Aerosol-based suppression system, Flooded fire protection systems

Full Specification Sheet

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Plant Round-Trip Efficiency

Duration
duration 2 h
0.5C
—
State of health
new system
as-new
—
DC block
typical @2 h
round trip @ 2 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 acres14.7 m² / MWh159 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
6.9 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 CRRC Zhuzhou Institute Systems

16
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CRRC Zhuzhou Institute6.25MWh—2–4h0.5–0.25C · flexLFP287 Ah · Prismatic
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CRRC Zhuzhou Institute
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CRRC Zhuzhou Institute
CESS-L5016-STR-0.25CDC Block · 20 ft container
5.02MWh—4h0.25CLFP314 Ah · Prismatic
CRRC Zhuzhou Institute
CESS-L5016-US-0.5CDC Block · 20 ft container
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CRRC Zhuzhou Institute
CESS-L3727-US-0.5CDC Block · 20 ft container
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CRRC Zhuzhou Institute
CESS-L3727-EU-0.5CDC Block · 20 ft container
3.73MWh—2h0.5CLFP280 Ah · Prismatic
CRRC Zhuzhou Institute
CESS-L3450-EU-0.5CDC Block · 10 ft container
3.45MWh—2h0.5CLFP287 Ah · Prismatic

About the Vendor

CRRC Zhuzhou InstituteTier-1Listed Company

Founded in 1959 and based in Zhuzhou, Hunan, CRRC Zhuzhou Institute began as the Ministry of Railways’ Zhuzhou Electric Locomotive Research Institute. It is now a wholly owned CRRC subsidiary that makes integrated energy storage systems for grid use, and its battery container projects total more than 1 GWh, including 6.25 MWh systems in high renewable regions of northwest China.

Production scale20+ GWh
Company sizeMajor (10000+)
Vertical integrationMedium
BankabilityOverall Positive

How to Read the Product Page

This profile of CESS-L6901-EU-0.5C by CRRC Zhuzhou Institute is assembled exclusively from public data to support early-stage screening and requires additional due diligence.

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