Bangladesh's industrial electricity tariff structure creates a hidden cost that most factory managers overlook: the demand charge. In addition to energy consumption (BDT/kWh), BPDB charges commercial and industrial consumers a monthly demand fee based on peak 15-minute consumption — typically BDT 400–600 per kW of peak demand. For a factory with a 500 kW peak load, this adds BDT 2–3 lakh per month before consuming a single unit of energy.
How BESS Eliminates Demand Charges
A Battery Energy Storage System intelligently charges during low-demand periods (overnight on grid, or midday from solar excess) and discharges during peak demand windows — typically 8–10 AM and 6–8 PM. By shaving these demand peaks to a contracted level, BESS can reduce monthly demand charges by 60–80%, creating immediate and predictable savings independent of solar generation.
Technology: Why LFP Wins in Bangladesh
CDS exclusively deploys lithium iron phosphate (LFP) chemistry BESS for industrial applications in Bangladesh. Compared to NMC (lithium nickel manganese cobalt), LFP offers three critical advantages for the Bangladesh context: First, thermal stability — LFP cells do not undergo thermal runaway at the operating temperatures common in Bangladeshi industrial facilities (35–45°C ambient). Second, cycle life — LFP delivers 4,000–6,000 full cycles vs 1,500–2,000 for NMC, making the economics significantly superior at Bangladesh's electricity prices. Third, safety — no toxic cobalt content and zero fire risk under abuse conditions.
- LFP Battery Storage — modular rack-mount units, 5–250 kWh, IP55 rated for industrial environments
- LFP cell chemistry — 4,000+ cycle life at 80% DoD, extended capacity warranty
- ABB REACT 4 inverter-charger — bidirectional AC/DC with grid-forming capability
- SCADA integration — Modbus TCP/IP connection to factory EMS and SunEcono monitoring portal
- Automatic transfer switch — seamless switchover in <20ms for critical load protection
Case Study: 200 kWh BESS at Pharma Facility
A pharmaceutical manufacturer in Tongi required uninterrupted power for API synthesis lines — any grid interruption above 3 minutes caused batch loss worth BDT 8–15 lakh. CDS deployed a 200 kWh LFP BESS integrated with the existing 300 kWp rooftop solar. The system provides 45 minutes of full-load backup and shaves demand peaks above 180 kW. In the first 12 months, demand charges reduced by BDT 18.4 lakh, and zero batch losses occurred due to power events.
“Battery storage for critical manufacturing is not a luxury — it is the insurance premium that never feels expensive after the first prevented outage.”
— CDS Energy Engineering Team