ST6900UX-4H PowerTitan 3.0 Liquid Cooled Energy Storage System

Name: ST6900UX-4H PowerTitan 3.0 Liquid Cooled Energy Storage System
Brand: Sungrow

Grid-ScaleAC Block20 ft container

Updated Aug 27, 2026

Grid-ScaleAC Block20 ft containerUpdated Aug 27, 2026

Sungrow ST6900UX-4H PowerTitan 3.0 is a containerized LFP battery energy storage system supplied as an AC block. It provides 6.904 MWh nominal energy and operates across a 1101.6 to 1489.2 V DC window. The system uses liquid cooling and weighs 55 tonnes (121,254 lb).

Use Cases

Sungrow ST6900UX-4H PowerTitan 3.0 Liquid Cooled Energy Storage System has energy capacity within the utility-scale range. That points to use in front of the meter, on the utility's side of the connection.

Capabilities

Its AC block includes the inverter, which points to renewable colocation, storing output from a wind or solar plant on the same site. Sungrow ST6900UX-4H PowerTitan 3.0 Liquid Cooled Energy Storage System holds about 3.84 h of storage at full power, calculated from 6.904 MWh and 1.8 MW, and the specifications suggest capacity value, being counted on as supply when the network is tight.

Nominal energy

6.9MWh

Rated AC power

1.8MW

What does this system typically cost?

BESSBASE.com user price estimates for ST6900UX-4H PowerTitan 3.0 Liquid Cooled Energy Storage System by Sungrow 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

6.9MWh

Rated AC power

1.8MW

Architecture

Container count

Installation

Outdoor-capable

DC Side

DC voltage range

1,101.6 – 1,489.2 V

AC Side

AC voltage

690 V

AC voltage range

621 V - 759 V

Rated AC current

1656 A

Grid frequency

50 Hz / 60 Hz

Physical & Footprint

Dimensions (W × D × H)

6,058 × 2,438 × 2,896mm

Weight

55t

Battery Cells

Chemistry

LFP

Cell supplier

BYD Energy Storage

Lifespan

Protection

Enclosure protection

IP55

Corrosion protection

Fire & safety

FACP, Flammable gas detector, Smoke detector, Heat detector, Sounder beacon, Alarm bell, Extinguishant abort button, Ventilation system, Extinguishant release button, Gas release indicator, Aerosol

Full Specification Sheet

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Plant Round-Trip Efficiency

Duration

energy ÷ power 3.83 h

0.26C

—

State of health

new system

as-new

—

DC block

typical @3.8 h

round trip @ 3.8 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 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 Sungrow Systems

Vendor	System	Energy	Power	Duration	Battery Cell
Sungrow	ST6900UX-4H PowerTitan 3.0 Liquid Cooled Energy Storage SystemAC Block · 20 ft container	6.9MWh	1.8MWAC	—	LFP
Sungrow	ST5015kWh-1250kW-4hAC Block	5.02MWh	1.25MWAC	4h	LFP314 Ah · Prismatic
Sungrow	ST5015kWh-2500kW-2hAC Block	5.02MWh	2.5MWAC	2h	LFP314 Ah · Prismatic
Sungrow	ST455kWh-110kW-4hAC Block · cabinet	0.46MWh	0.11MWAC	4h	LFP280 Ah · Prismatic
Sungrow	ST255CS-2HAC Block · cabinet	0.26MWh	0.13MWAC	—	LFP314 Ah · Prismatic
Sungrow	ST225kWh-110kW-2hAC Block · cabinet	0.23MWh	0.11MWAC	2h	LFP280 Ah · Prismatic

About the Vendor

SungrowTier-1Listed Company

Sungrow Power Supply Co., Ltd., founded in 1997 by university professor Cao Renxian and based in Hefei, China, grew from a PV inverter business into a maker of grid-scale energy storage systems, shipping 10.5 GWh of BESS in 2023, 28 GWh in 2024, and 43 GWh in 2025, for 70 GWh of cumulative ESS shipments by mid-2025.

Production scale20+ GWh

Company sizeMajor (10000+)

Vertical integrationMedium

BankabilityOverall Positive

View the full Sungrow profile →

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