In a move aimed at boosting energy storage capacity and grid flexibility, NTPC Vidyut Vyapar Nigam Ltd. (NVVN) has issued an open tender inviting bids to develop a 125 MW / 500 MWh standalone Battery Energy Storage System (BESS) at a 220 kV substation in Durg district, Chhattisgarh. The project seeks to reinforce grid stability and support peak-load management in the region.
Tender Overview
- Total BESS Capacity: 125 MW / 500 MWh
- Project Location: Near 220 kV Khedamara Substation, Durg district, Chhattisgarh
- Bidding Route: Competitive bid / Request for Selection (RfS)
- Issuing Authority: NTPC Vidyut Vyapar Nigam Ltd. (NVVN)
Financial & Bid Conditions
- Bid Processing Fee: ₹1.5 million + 18% GST
- Earnest Money Deposit (EMD): ₹880,000 per MW of quoted capacity
- Performance Bank Guarantee (PBG) on award: ₹2.2 million per MW awarded capacity
- Success Charge: ₹100,000 per MW + 18% GST, payable within 30 days of Letter of Award (LoA)
- Viability Gap Funding (VGF): ₹1.8 million per MWh of awarded capacity — total support ceiling ₹900 million (for 500 MWh)
Technical & Performance Specifications
- Minimum Round-Trip Efficiency (RtE): 85% (monthly guarantee)
- Operational Cycle Requirement: At least one full charge–discharge cycle/day (~420 cycles/year)
- Capacity Retention at Contract End: Dispatchable capacity must remain ≥ 70% by end of 16-year contract period
- System Availability: Minimum 95% monthly availability required; NVVN may impose liquidated damages for shortfalls
- Contract Termination Clause: NVVN reserves the right to terminate if availability remains below 50% for two or more cumulative years
Developer Eligibility Criteria
Must have positive net worth in the last three financial years
- Minimum Net Worth: ₹8.8 million per MW of quoted capacity (≈ ₹110 crore for 125 MW project)
- Minimum Average Annual Turnover (last 3 years): ₹29.2 million per MW quoted capacity
| Capacity | 25 MW / 500 MWh |
| Location | Durg district, Chhattisgarh |
| Last Date | 30/12/2025 |
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