1720KWH-800KW Solution (Taiwan)
Project Description
This project delivers a 1.72MWh / 800kW grid-connected battery energy storage system (BESS) deployed at a wastewater treatment facility in Taiwan. The system is engineered specifically for peak shaving and load shifting, dramatically reducing the facility’s monthly electricity costs by storing off-peak energy and discharging during high-tariff periods.
The solution is housed in a single 20-foot ISO containerized unit, integrating eight (8) strings of LFP battery clusters with a modular 800kW power conversion system (PCS). The air-cooled design with industrial-grade climate control ensures reliable operation in Taiwan’s humid subtropical environment, while the compact footprint minimizes civil works and installation complexity.
Total Energy Capacity
Rated Output Power
20ft Container
PCS Efficiency
Cell Chemistry
Protection Rating
🔌 Key Innovation: All-in-One Containerized Air-Cooled BESS
Unlike conventional multi-cabinet deployments requiring separate battery rooms and HVAC infrastructure, this solution packs 1.72MWh of LFP storage plus an 800kW PCS into a single 20ft container. The dual-compartment design isolates the battery chamber (with precision air-conditioning and heptafluoropropane fire suppression) from the inverter chamber (forced-air cooled), achieving IP54 protection while maintaining optimal thermal performance across a -25°C to 55°C operating range. The result: rapid deployment, minimal site preparation, and industry-leading round-trip efficiency.
- Peak Shaving & Load Shifting: The EMS automatically charges during off-peak hours (low tariff) and discharges during peak demand periods, significantly reducing monthly demand charges and time-of-use (TOU) electricity costs for the wastewater treatment plant.
- Modular PCS Architecture: Eight × 100kW PCS modules operate in parallel via a centralized DC bus, delivering up to 800kW to the 400V AC grid with four-quadrant active/reactive power control and power factor >0.99.
- Air-Cooled LFP Battery System: Eight clusters of 768V / 280Ah LFP cells (1720.32 kWh total) using 3.2V prismatic cells with 6000+ cycle life. Industrial AC maintains battery temperature within safe limits even during high ambient conditions.
- Integrated Safety Systems: Multi-layer protection including three-level BMS (BMU/BCMU/BAMS), heptafluoropropane gas fire suppression with <8s fill time, smoke/heat detection, emergency lighting, and access control interlock.
- Rapid Deployment: Single-container design eliminates need for dedicated battery building. Transported as a complete factory-tested unit, installed on a simple concrete plinth with only grid connection required on-site.
Project Images
Battery System Specifications
| Battery Pack Parameters | |
|---|---|
| Cell Type | LFP – 280Ah Prismatic |
| Total Capacity | 1,720 kWh (1720.32 kWh) |
| Battery Configuration | 7P240S |
| Nominal Voltage | 768 V DC |
| Voltage Range | 691 V – 844 V DC |
| Operating Temperature | -25°C to 55°C |
| Cooling Method | Air-Cooled (Industrial AC) |
| Cycle Life | ≥ 8,000 cycles @ 80% DOD |
| Protection Rating | IP54 |
| Max Altitude | ≤ 4,000 m |
| Dimensions (W×D×H) | 6,058 × 2,438 × 2,896 mm (20ft container) |
| Weight | ≈ 17 Tonnes |
| Battery Module Specifications | |
| Module Capacity | 43 kWh |
| Module Configuration | 1P48S |
| Nominal Voltage | 153.6 V DC |
| Cell Capacity | 280 Ah |
| Module Dimensions (W×D×H) | 770 × 1,130 ×245 mm |
| Module Weight | 320 kg |
Inverter & PCS Specifications
| PCS Parameters (EPCS800-AS) | |
|---|---|
| Inverter Type | Grid-Tied (On-Grid) |
| Rated Output Power | 800 kW |
| Maximum Output Power | 880 kW |
| DC Voltage Range | 650 V – 950 V DC |
| Maximum DC Current | 1,304 A (163 A × 8 strings) |
| AC Rated Voltage | 400 V AC (3-phase 4-wire) |
| Grid Voltage Range | 320 V – 450 V AC |
| Maximum AC Current | 1,272 A |
| Rated Frequency | 50 / 60 Hz |
| Power Factor | > 0.99 (at rated power) |
| Power Factor Range | -1 (leading) ~ 1 (lagging) |
| Total Harmonic Distortion | < 3% (at rated power) |
| Maximum Efficiency | 98% |
| Cooling Method | Forced Air Cooling |
| Noise Level | < 70 dB |
| Dimensions (W×D×H) | 1,600 × 1,000 × 2,050 mm |
| Weight | 750 kg (8 × 100kW modules) |
Container & Safety System Specifications
| Container Overview | |
|---|---|
| Container Type | 20ft Standard ISO Container |
| External Dimensions (L×W×H) | 6,058 × 2,438 × 2,896 mm |
| Total Weight | ≈ 17 – 18 Tonnes |
| Compartment Layout | Dual-chamber: Battery Chamber + Inverter Chamber |
| Battery Chamber Cooling | Industrial Air Conditioning (precision temp control) |
| Inverter Chamber Cooling | Forced Air (direct exhaust) |
| Protection Rating | IP54 |
| Fire Suppression System | |
| Agent Type | Heptafluoropropane (HFC-227ea) Gas + Water Spray Backup |
| Fill Time | < 8 seconds (full battery chamber coverage) |
| Detection | Smoke sensors + Heat sensors + Optical alarm |
| Safety Interlock | Automatic system shutdown upon detection; gas release indicator |
| BMS (Battery Management System) | |
| Architecture | 3-Level: BMU (module) → BCMU (cluster) → BAMS (array) |
| SOC Estimation Accuracy | ≤ 5% |
| Communication | CAN bus + RS485 + Ethernet |
| Key Functions | Real-time monitoring, cell balancing, over/under voltage/current/temp protection, thermal management, event logging |
| EMS (Energy Management System) | |
| Functions | Real-time monitoring, peak shaving scheduling, TOU optimization, remote dispatch, fault alarm, reporting |
| Protocol Support | MODBUS RTU/TCP |
| User Interface | Touchscreen HMI + Remote SCADA connectivity |