English EnglishViews: 0 Author: Site Editor Publish Time: 2025-05-28 Origin: Site
As global energy transformation accelerates, user-side distributed energy storage systems have become essential for industrial enterprises aiming to optimize energy costs and enhance power reliability. The 9MW/20.1MWh distributed storage project by New Tech Wood in Huizhou, Guangdong, is now fully operational, marking a key milestone in the company's green energy transformation journey.
Located in Daling Town, Huizhou City, this project features three 3MW/6.7MWh storage systems (totaling 9MW/20.1MWh). It adopts six high-capacity 3.35MWh integrated containerized units with remote monitoring for real-time supervision, measurement, and control.
Following Guangdong's time-of-use electricity pricing, the system operates with two daily cycles—charging during off-peak and flat-rate hours and discharging during peak hours. This load-shifting strategy generates economic returns through electricity price arbitrage, substantially reducing power bills while stabilizing plant energy consumption.
Time-of-use electricity price
| Time period (not July, August, September): | Absorption/release power strategy |
| 0:00-8:00 (valley electricity) | Absorb electricity from the mains |
| 8:00-10:00 (normal electricity) | Stand still, no charging or discharging |
| 10:00-12:00 (peak electricity) | Supply electricity to the factory |
| 12:00-14:00 (normal electricity) | Absorb electricity from the mains |
| 14:00-19:00 (peak electricity) | Supply electricity to the factory |
| 0:00-8:00 (valley electricity) | Enter the next day's cycle |
| Time period (July, August, September) | Absorb/release power strategy |
| 0:00-8:00 (off-peak electricity) | Absorb power from the mains |
| 8:00-10:00 (normal electricity) | Stand still, no charging or discharging |
| 10:00-11:00 (peak electricity) | Supply power to the factory |
| 11:00-12:00 (peak electricity) | Supply power to the factory |
| 12:00-14:00 (normal electricity) | Absorb power from the mains |
| 14:00-15:00 (peak electricity) | Supply power to the factory |
| 15:00-17:00 (normal electricity) | Supply power to the factory |
| 17:00-19:00 (peak electricity) | Supply power to the factory |
| 0:00-8:00 (off-peak electricity) | Enter the next day's cycle |
The project uses LFP batteries known for their safety, long life, and environmental friendliness—making them the preferred solution for modern C&I energy storage.
Container design simplifies transport, installation, and future upgrades. The system integrates intelligent HVAC, fire suppression, BMS, and video surveillance for secure and reliable operation in varying climates.
Multi-layer protections include fire alarms, fault isolation, and humidity/temperature control. Decoupled PCS and battery compartments offer high compatibility and easy maintenance.
In response to policy shifts and diminishing rooftop solar ROI, this energy storage system offers a predictable return while strengthening grid independence and plant power reliability.
The energy storage system of this project consists of a battery cluster, BMS battery management system, fire protection system, temperature control system, central control cabinet, container, AC and DC cables, and a transformer and current booster.
| Serial number | Equipment name | Model | Quantity |
| 1 | Energy storage battery system | Aqua CG1 liquid-cooled battery container system | 6 |
| 1.1 | Battery cluster | 1331.2V/280Ah (8 modules in series 280Ah/46.592KWh, 1P52S) | 9 |
| 1.2 | Battery management system | BMS battery management system, active balancing | 1 |
| 1.3 | Fire protection system | Perfluorohexanone, module-level + cabin-level fire protection | 1 |
| 1.4 | Temperature control system | Liquid cooling system, 50kW | 1 |
| 1.5 | Central control cabinet | AC power supply, UPS, DC bus, etc. | 1 |
| 1.6 | Container | 6058mm*2700mm*3100mm, IP55 | 1 |
| 1.7 | Cables and accessories | / | 1 |
| 2 | Inverter and booster integrated machine | Rated power 2500kW, AC output 10kV/50Hz | 3 |
| 2.1 | Energy storage inverter | 1500kW, 50Hz, three-phase three-wire, without isolation transformer, outdoor type | 1 |
| 2.2 | Booster transformer | SCB11-2000kVA/10kV, Dy11, 12.5±2×2.5%/0.69kV, Ud%=8% | 1 |
| 2.3 | Ring network cabinet | Vacuum circuit breaker, current transformer, lightning arrester, etc. | 1 |
| 2.4 | Distribution cabinet | Including communication, power distribution, UPS, transformer measurement and control, EMU, switch | 1 |
| 2.5 | Container | 6058*2700*2896mm, IP54 | 1 |
The cycle life standard of energy storage batteries is 80%, and the calendar life of batteries is 10 years. The annual attenuation of this project is calculated using the linear decreasing method, so the annual attenuation is 2% per year.
| Battery capacity | 20100kWh |
| PCS power | 9000kW |
| Charge/discharge efficiency | 94% |
| Charge/discharge depth | 95% |
| Annual operating days | 350 |
| Annual attenuation | Decrease by 2% per year |
The project followed a structured construction plan across five phases—from groundwork and cabling to equipment testing and trial operation. The team ensured safety, minimized cross-interference, and addressed all quality concerns proactively.
· On-Site Survey & Measurement — The project team conducted detailed field visits to assess the terrain, surrounding infrastructure, and measure the designated construction zone.
· Geological & Foundation Assessment — Professional evaluations of soil and subgrade stability were performed to ensure that the site could safely support the heavy containerized energy storage units, with tailored solutions for anti-settlement and waterproofing.
· Structured Departmental Coordination — Civil, electrical, fire protection, and communication engineering teams operated according to a unified construction schedule, minimizing workflow conflicts and maximizing efficiency.
· On-Site Safety Supervision — Designated safety inspectors performed regular checks on construction zones and equipment, particularly during key operations such as equipment hoisting and electrical installation, ensuring compliance with safety protocols and eliminating hazards in real-time.
· Technical System Testing — Professional engineers conducted phased testing of the battery clusters, PCS (Power Conversion Systems), EMS (Energy Management System), fire protection, and thermal control systems to confirm operational stability and parameter alignment.
· Ongoing Performance Monitoring — A hybrid approach of remote intelligent monitoring and on-site inspections was implemented, including monthly performance checks, annual battery health assessments, and integrated fire and cooling system drills, ensuring high-efficiency and safe operation for over 10 years.
As solar energy faces increasing competition and policy uncertainty, user-side energy storage offers a more stable, self-sufficient path to energy optimization. New Tech Wood's 9MW/20.1MWh ESS project stands as a proven model for industrial users seeking to reduce peak electricity costs, enhance grid independence, and future-proof their energy strategies with a scalable and intelligent storage solution.
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