1.Project Overview
HDX Energy designed and delivered a commercial and industrial energy storage microgrid system for a factory in Bangladesh. This system aims to improve green electricity utilization, reduce electricity costs, and enhance the factory’s power supply reliability during grid fluctuations or power outages.
2. System Configuration
Energy Storage: Two HDX Energy self-developed 100 kW/215 kWh commercial and industrial energy storage integrated cabinets.
- Uses first-tier brand LFP cells with a cycle life > 6,000 cycles.
- Modular, highly integrated design, footprint < 1.5 m²/unit, supports rapid parallel connection.
- IP54 protection, full-power operation from -20℃ to +50℃, adaptable to the high temperature and humidity environment of Bangladesh.
- Built-in EMS, supporting various operating strategies such as peak-valley arbitrage, demand management, off-grid backup power, and smoothing photovoltaic output.
Photovoltaics: 300 kW high-efficiency monocrystalline modules are installed on the roof and ground parking lot, generating approximately 420 MWh annually, meeting about 30% of the factory’s daytime electricity demand.
Dual-mode operation (grid-connected/off-grid)
- Grid-connected voltage: 400 VAC, 50 Hz
- Off-grid switching time: <20 ms, ensuring uninterrupted operation of critical production lines
- Diesel generator interface reserved for future expansion into a “photovoltaic-storage-diesel” microgrid
3. Core Functions
Peak-Valley Arbitrage: Utilizing the price difference between the 8-hour off-peak (22:00-06:00) and 6-hour peak (18:00-22:00) hours in Bangladesh, with two charging and two discharging cycles daily, it is estimated to save approximately US$150,000 in electricity costs annually.
Demand-Based Electricity Cost Optimization: The energy storage system monitors grid-connected power in real time and rapidly discharges during load surges, avoiding over-billing by transformers, and is estimated to save 8% in demand-based electricity costs annually.
Off-Grid Backup Power: When the external grid experiences a power outage, the energy storage can independently power a critical 200 kW production line for 2 hours continuously; if combined with photovoltaic output, the backup power duration can be extended to over 4 hours.
PV Smoothing: Through second-level power closed-loop control, PV fluctuations are controlled within ±3%, meeting the factory’s power quality requirements.
4. Economic and Social Benefits
- The project’s static investment payback period is 4.2 years (including only peak-valley arbitrage and demand management benefits).
- Annual CO₂ emissions are reduced by approximately 260 tons, equivalent to planting 14,000 trees.
