PRODUCT OVERVIEW: ST255CS-2HPOWERSTACK C&I LIQUID-COOLED ENERGY STORAGE SYSTEM
Engineered for the next generation of commercial and industrial energy management, the ST255CS-2HPowerStack delivers a compact, high-density, liquid-cooled Battery Energy Storage System (BESS). Designed to optimize self-consumption, execute peak shaving, and provide critical backup power, this Tier-1 LFP-based platform reduces operational expenditures while ensuring superior safety and longevity. The IP55 outdoor-rated chassis integrates seamlessly with PV infrastructure, EV fast-charging hubs, and micro-grid control systems.
SYSTEM ARCHITECTURE & SAFETY PROTOCOLS
The ST255CS-2HPowerStack utilizes a multi-layered safety architecture. The intelligent Battery Management System (BMS) performs real-time cell monitoring with millisecond-level fault isolation. The integrated Passive Cell-to-Pack (CTP) design minimizes internal resistance while maximizing volumetric energy density. The Active Equalization function ensures each of the 280Ah prismatic LFP cells maintains balanced state-of-charge (SOC), extending cycle life beyond 8,000 cycles at 25°C.
KEY FEATURES
– Advanced Liquid Cooling: Maintains cell temperature differential < 3°C, reducing thermal stress and improving calendar life by up to 25% compared to air-cooled systems.
- Tier-1 LFP Cells: Zero thermal runaway propagation between cells; UL 9540A tested for maximum safety compliance.
- Modular Scalability: Supports parallel connection of up to 10 units (2.15 MWh total capacity) via external DC busbar, enabling stepwise capacity expansion.
- Grid-Forming & Islanding Capable: Seamless transition to off-grid mode within 20ms, ideal for industrial parks and critical infrastructure.
- Smart EMS Interface: Integrated cloud-based Energy Management System (EMS) supports remote firmware upgrades, predictive maintenance alerts, and real-time arbitrage scheduling.
COMPLIANCE & STANDARDS
- UL 9540 (Energy Storage Systems & Equipment)
- UL 1973 (Batteries for Use in Stationary Applications)
- UL 9540A (Thermal Runaway Fire Propagation)
- IEC 62619 (Safety for Secondary Lithium Cells)
- IEC 61000-6-2 / -4 (Electromagnetic Compatibility)
- UN 38.3 (Transportation Safety)
TECHNICAL SPECIFICATIONS
System Parameters
- Nominal Energy: 215 kWh (DC side) / 215 kWh (AC usable, 100% DoD)
- Usable Capacity: 215 kWh @ 0.5C, 25°C, EOL 80% SOH
- Nominal Voltage: 768 V DC
- Voltage Range: 672 V – 876 V DC
- Max. Charge/Discharge Power: 100 kW / 100 kW (0.5C)
- Peak Power (60s): 130 kW
- Round-Trip Efficiency: ≥ 91% (DC/AC, @ 0.5C, 25°C)
Battery & Cooling
- Cell Chemistry: Lithium Iron Phosphate (LFP), prismatic 280Ah
- Cycle Life: ≥ 8,000 cycles @ 25°C, 0.5C, 90% DoD, EOL 60% SOH
- Thermal Management: Intelligent liquid cooling with anti-freeze coolant (IP67 pump)
- Operating Temp. Range: -30°C to +55°C (derated above 45°C)
- Relative Humidity: 0% – 95% (non-condensing)
| Parameter | Specification |
|---|---|
| Nominal Energy | 215 kWh (DC side) |
| Cooling Method | Smart Liquid Cooling (ΔT < 3°C) |
| Cell Chemistry | Tier-1 LFP (Prismatic 280Ah) |
| Max. Output Power | 100 kW (continuous), 130 kW (peak 60s) |
| Round-Trip Efficiency | ≥ 91% (DC/AC) |
| Cycle Life | ≥ 8,000 cycles @ 25°C |
| Operating Temp. Range | -30°C to +55°C |
| Enclosure Rating | IP55 (cabinet) |
| Safety Certifications | UL 9540, UL 1973, IEC 62619 |
| Parallel Scalability | Up to 10 units (2.15 MWh) |
Inverter (PCS) Integration
– AC Output (Nominal): 100 kW / 100 kVA
– AC Voltage Range: 400 V ±15% (3W + N + PE), 50/60 Hz
– THDi: < 3% (full load)
- Grid Connection Type: 3-phase, 4-wire
- Islanding Mode: Supported (optional external transfer switch)
Enclosure & Logistics
- Dimensions (W x D x H): 1,200 mm x 1,400 mm x 2,200 mm
- Weight: Approx. 2,450 kg
- Ingress Protection: IP55 (cabinet), IP67 (connectors)
- Fire Suppression: Aerosol-based automatic suppression + gas detection
- Noise Emission: < 65 dB @ 1 m
INDUSTRIAL DEPLOYMENT RECOMMENDATIONS
For optimal lifetime performance and safety compliance, install the ST255CS-2HPowerStack on a flat, level concrete pad with a minimum load rating of 4,000 kg. Maintain a 1.5 m front clearance for service access and 0.8 m side clearance for thermal exhaust. For micro-grid or peak-shaving configurations, pair the system with an external AC combiner panel (rated ≥ 400 A). All installations must incorporate an external DC-rated disconnect switch for emergency response compliance per NEC 2023 / IEC 60364.
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