How BESS works — from cell chemistry to bankability. Start free on learnBESS.com
AC Block

PowerTitan 3.0 ST6900UX-4H

Sungrow · LFP · Intelligent liquid cooling · 20-ft container

Utility-scale AC-coupled storage container holding 6,904 kWh of LFP cells with four integrated 450 kVA silicon carbide conversion units, rated for four-hour discharge. Transformerless design outputs 690V AC directly, with intelligent liquid cooling and an IP55 enclosure rated to 4,000 m altitude.

6,904 kWh
Capacity
4h
Duration
LFP
Chemistry
IP55
IP Rating
Download datasheet (PDF)

Specifications

DC Side
Cell Chemistry LFP
Nominal Capacity 6,904 kWh
Nominal Voltage Range 1,101.6-1,489.2V DC
AC Side
Nominal AC Power 1,800 kVA (450 kVA x 4)
Nominal AC Voltage 690V
AC Voltage Range 621-759V
Nominal AC Current 414A x 4
THDi < 1% (nominal power)
DC Component < 0.5%
Power Factor > 0.99 / 1 leading to 1 lagging
Reactive Power Range -100% to +100%
Nominal Frequency 50 Hz / 60 Hz
Isolation Method Transformerless
System Parameters
Dimensions (W x H x D) 6,058 x 2,896 x 2,438 mm
Weight 55,000 kg
Degree of Protection IP55
Anti-corrosion Grade C4
Operating Temp -30 to +45 C
Operating Humidity 0-100%
Max Operating Altitude 4,000 m
Temperature Control Intelligent liquid cooling
Communication Ethernet

Key Features

  • Stacked-cell architecture paired with a silicon carbide PCS to lift round-trip efficiency
  • Pre-installed and pre-commissioned, with single-action array configuration and inspection
  • Sub-second plant-level response supporting voltage, frequency and phase-angle regulation
  • Configurable inertia support for grid-forming duty
  • Thermal runaway early warning with lithium plating diagnosis
  • ArcDefender DC arc detection on the storage side
  • Wireless-free deployment with encrypted end-to-end communication
Product Certifications
UL 9540A IEC 62619 IEC 61000-6-2 EN 55011 IEC 62933-5-2 UN 38.3 / UN 3536 IEC 62477-1 IEC 62443-4-2
Environmental Compliance
About the manufacturer
Sungrow
Hefei, China · Founded 1997

Sungrow Power Supply, founded in 1997 and headquartered in Hefei, China, is one of the world's largest manufacturers of power conversion systems and integrated AC-coupled battery energy storage systems. The company shipped 43 GWh of energy storage systems in 2025, ranking amon...

View full {name} profile →
PowerTitan 3.0 ST6900UX-4H Datasheet
Sungrow · PDF
Download datasheet
or
Get notified when {manufacturer} releases new products
We track spec changes so you don't have to.