Gujarat Issues 1 GW/4 GWh Standalone Battery Storage Tender: GUVNL Opens Bids for Phase-X BESS

Gujarat Urja Vikas Nigam Limited (GUVNL) has initiated a tariff-based competitive bidding process to secure 4,000 MWh of on-demand capacity for state DISCOMs, marking a significant expansion of Gujarat’s grid-scale storage pipeline with a September 2026 deadline.

In a major signal to the energy storage market, Gujarat Urja Vikas Nigam Limited (GUVNL) has invited bids for the development of 1,000 MW / 4,000 MWh of standalone Battery Energy Storage Systems (BESS) under Phase-X. The procurement seeks to provide state DISCOMs with four-hour discharge capacity on an “on-demand” basis via a tariff-based competitive bidding process, with bid submissions closing on September 14, 2026.

Technical Specifications and Project Scope

The projects are structured on a Build-Own-Operate (BOO) basis for an operational term of 12 years. Bidders must adhere to rigorous technical and operational benchmarks to ensure grid stability and performance:

• Capacity and Configuration: Total capacity of 1,000 MW power and 4,000 MWh energy, ensuring a four-hour discharge duration at rated power.
• Operational Cycles: Systems must be capable of up to two operational cycles per day.
• Efficiency and Retention: Mandatory minimum Round-Trip Efficiency (RTE) of 82% (AC-AC) and a capacity retention requirement of at least 80% at the end of 10 years.
• Performance Metrics: Guaranteed minimum annual system availability of 95% and a required C-rate of 0.25.
• Charging Mechanism: GUVNL will provide charging power via the State Transmission Utility (STU/GETCO) network.
• Indigenous Development Mandate: Prohibits the use of refurbished battery cells and mandates that the Energy Management System (EMS) software be indigenously developed in India.
• Dispatch Capability: The BESS must be capable of responding to State Load Dispatch Centre (SLDC) instructions within 5 minutes, operating in groups ranging from 50 MW/200 MWh to 100 MW/400 MWh.

Grid Connectivity and Site Identification

Projects must be strategically located near 11 designated substations within the State Transmission Utility (STU) network. Strategic locations include Kutch, Banaskantha, Bhuj, Surendranagar, Patan, and Mehsana—districts that serve as epicenters for wind and solar generation where curtailment risks are highest.

The cumulative grid connectivity available for these projects is 1,475 MW. Under the tender terms, the BESS Developer (BESSD) is responsible for the entirety of land acquisition and interconnection costs with the GETCO network, representing a significant risk-management component for participating firms.

Auction Mechanism and Fee Structure

The procurement follows a two-stage process: an e-bidding phase followed by an e-reverse auction. Selected bidders will sign a Battery Energy Storage Purchase Agreement (BESPA). The minimum bid size is set at 65 MW / 260 MWh.

Bidder Eligibility and Compliance

To participate, bidders must meet specific financial and technical qualifications:

• Financial Standing: A minimum net worth of INR 1 crore per MW of quoted capacity as of the last date of FY2026.
• Technical Experience: Commissioned experience in 765 kV to 66 kV transmission lines or substations (INR 100 crore cumulative); 1 MW of power/RE capacity per 10 MW/40 MWh of BESS capacity bid; or 10 MWh of existing BESS capacity.
• Domestic Content Mandate: In alignment with the “Make in India” vision, the Ministry of Power mandates a minimum of 20% local content for projects supported via Viability Gap Funding (VGF) or the Power System Development Fund (PSDF). This threshold includes indigenously developed EMS software.

Access GUVNL Standalone BESS Phase-X Tender Bidding:

Bidders must register online and submit their proposals through the Official GUVNL e-Bidding Portal on Bharat Electronic Tender. Tender documents, notices, and future clarifications can also be accessed on the Gujarat Urja Vikas Nigam Limited (GUVNL) Website.

Timeline and Procedural Milestones

• Bid Submission Deadline: September 14, 2026.
• Opening of Techno-Commercial Bids: September 18, 2026.

Regulatory and Market Context

This Phase-X tender follows GUVNL’s Phase IX auction for 450 MW/900 MWh, which saw aggressive undercutting during the e-reverse auction. In that round, NLC India Renewables Limited secured 275 MW at a tariff of ₹2,31,989/MW per month, while Sun Drops Energia Limited secured 175 MW at ₹2,31,990/MW per month.

The 4 GWh scale of this tender addresses Gujarat’s “Solar Surplus vs. Evening Peak” structural mismatch. With over 25 GW of solar capacity, the state faces midday surpluses that require absorption between 11 AM and 3 PM, followed by a sharp demand peak from 6 PM to 10 PM.

Market costs are further influenced by the September 22, 2025, tax reform that reduced GST on renewable energy devices from 12% to 5%. Critically, the CERC Suo Motu Order dated November 4, 2025, mandates that all “Change in Law” savings resulting from this GST reduction must be passed through to electricity consumers, preventing developers from retaining the tax benefit as additional profit.