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Sungrow Energy Storage (PV-ESS)

125kW/257kWh ST255CS-2H

Cost Efficiency

Integrated pre-installation/pre-commissioning reduces on-site work.

AI-controlled thermal balance cuts daily system heat loss by 33%.

Precise liquid-cooling keeps cell temperature difference ≤2.5°C

High Efficiency & Flexibility

DC/AC power conversion reaches up to 98.5% efficiency.

Seamless cabinet installation (supports side-by-side setup).

Flexible grid connection (on-grid, off-grid, and automatic switching available).

Smart & Robust Operation

Cloud-based monitoring (real-time alarms/troubleshooting via IsolarCloud App/web).

Wireless intelligent O&M (near-field/remote operation; one-key commissioning lowers maintenance costs).

Safety & Reliability

AI-monitored cell health (early warnings for thermal runaway).

Three-level over-current protection (covers PACK, RACK, PCS).

Three-level fire prevention (early thermal runaway alerts to avoid fires).

ST256CS 2H Energy Storage System

DC Side

Cell Type: LFP (3.2V/314Ah)

Configuration: 26S61P

Nominal Capacity: 257 kWh

Voltage Range: 691.2V – 834.4V

Charge/Discharge Depth: 0%–100%

AC Side (On-Grid)

Nominal Power: 125 kW

Voltage: 400V (3P4W; 340V–440V range)

Frequency: 50/60Hz (45–55Hz/55–65Hz range)

Max Current: 351A (nominal power) / 255A (50/60Hz)

THD: ≤3% (nominal) / ≤0.5% (light load)

Power Factor: 1.0 leading–1.0 lagging

AC Side (Off-Grid)

Voltage: 400V

Frequency: 50/60Hz

THD: ≤3% (linear load)

Max Load: 100% rated capacity

System Basics

Dimensions (W×H×D): 1150×2450×1610mm

Weight: ≤3200 kg

Protection: IP55

Anti-Corrosion: C4 (default) / C5 (optional)

Operating Conditions: 0%–100% humidity; -30°C–50°C (derated at 40°C); max 3000m altitude

Cooling: Intelligent liquid cooling (≤65dB @1m)

Extras & Compliance

Fire Safety: Gas/smoke detectors + hot aerosol extinguisher

Communication: Ethernet (Modbus TCP)

Max Parallel: 25 (On-Grid) / 10 (Off-Grid)

Standards: IEC 62619, IEC 63056, etc.

Joinsun Energy

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