Bihar is not the state most people picture when they think about battery storage in India. It has modest renewable capacity, no large desert solar parks, and no eye-catching state battery subsidy. Yet in January 2026 it switched on what was reported as India’s largest commissioned solar-plus-battery project. The explanation says something useful about why storage spreads the way it does. This is the Bihar companion to our India BESS policy overview.
Why Bihar needs storage
Bihar’s electricity demand peaks in the evening, after dark, driven by household and small-commercial load. Cheap solar is generated in the middle of the day. The gap between those two facts is the entire business case, and it is the same reason states with far more renewable capacity are buying batteries.
The state’s answer has been unusual, though: rather than write a subsidy scheme and wait for private developers, Bihar’s public utilities have gone out and built the asset themselves.
The Kajra project: state-owned solar plus storage
The flagship is at Kajra, in Lakhisarai district, owned by BSPGCL (Bihar State Power Generation Company Limited) with L&T Construction as the EPC (engineering, procurement and construction) contractor.
The tender went out in December 2023 and the EPC contract was awarded in June 2024. In January 2026, the first phase was commissioned: 185 MW of grid-connected solar paired with 254 MWh of battery storage, along with a ten-year operations and maintenance commitment. The battery units were supplied by Hithium using LFP (lithium iron phosphate) chemistry with liquid cooling — the same chemistry-and-cooling combination that has become the default for Indian utility projects, for reasons we set out in our LFP versus NMC comparison.
A second phase is under way, reported to add a further 116 MW of solar and 241 MWh of storage, which would take the completed site to roughly 301 MW and 495 MWh.
The standalone tender: 500 MWh with VGF
Separately, in March 2025, BSPGCL invited bids for 125 MW / 500 MWh of standalone battery storage connected to state grid substations — batteries with no generation attached, charging from the grid and discharging into the evening peak.
The commercial structure matters here:
- Projects are on a build-own-operate-transfer (BOOT) basis.
- The BESPA (battery energy storage purchase agreement) is signed between BSPGCL, the holding company BSPHCL and the Bihar distribution companies.
- Developers must make the system available for one complete charge–discharge cycle per day.
- Selected projects are eligible for central viability gap funding of ₹27 lakh per MWh, or 30% of capital cost, whichever is lower — aggregating to about ₹135 crore.
That VGF number is the reason the tender is viable. A standalone battery in a state with modest tariffs cannot easily clear a bankable return on capital cost alone; a grant that covers up to 30% of capex changes the arithmetic. The mechanics of the national scheme are covered in our VGF explainer, and the general commercial shape of these contracts in our guide to standalone BESS.
Buying firmed power from outside the state
Bihar’s third route is simply to purchase firm renewable power that someone else has already firmed with batteries.
In early 2026, BSPHCL (Bihar State Power Holding Company Limited) moved to procure 190 MW of assured peak power from a battery-backed wind-solar hybrid project, facilitated by SECI under the ISTS Hybrid Tranche-VI scheme. The reported price was ₹4.72/kWh plus a ₹0.07/kWh SECI trading margin, under a 25-year power sale agreement. The Bihar Electricity Regulatory Commission (BERC) admitted the petition at a hearing on 22 January 2026 but sought clarifications on certain agreement clauses before final approval.
That sequence is worth noting for anyone new to Indian power procurement: a discovered price is not a done deal until the state regulator has approved both the price and its pass-through into consumer tariffs. The underlying asset in that contract is a solar-wind-plus-storage hybrid of exactly the kind used for renewable firming nationally.
| Bihar storage route | Entity | Size | Structure |
|---|---|---|---|
| Kajra solar-plus-BESS | BSPGCL (state-owned) | 301 MW / 495 MWh at full build | EPC contract, utility-owned |
| Standalone BESS tender | BSPGCL / BSPHCL / DISCOMs | 125 MW / 500 MWh | BOOT basis under a BESPA, VGF-backed |
| Hybrid peak power purchase | BSPHCL via SECI | 190 MW assured peak | 25-year PSA at ₹4.72/kWh |
What this means for you
- If you are a developer or IPP: Bihar is not a subsidy market, it is a contract market — and a fair share of the capacity is being built by the state itself rather than tendered out. The realistic entry points are the standalone BESS round, where VGF does the heavy lifting, and EPC or supply packages on state-owned projects.
- If you are an equipment supplier: the Kajra award shows what the state buys — LFP, liquid-cooled, with a long O&M tail attached. Expect multi-year service obligations to be part of the deal, not an add-on.
- If you are a C&I (commercial and industrial) buyer in Bihar: state procurement is aimed at the evening peak on the grid, not at your meter. If you are running diesel backup or paying demand charges today, behind-the-meter storage is a separate decision with its own payback.
Bihar’s storage programme is still being built out project by project, and tender terms, VGF eligibility, discovered tariffs and regulatory approvals change by government notification — the BSPHCL hybrid purchase above was still awaiting final BERC clearance at the time of writing. Treat every figure here as a July 2026 snapshot and confirm current provisions with BSPGCL, BSPHCL and BERC documents before committing. To size storage for your own site, try our BESS savings calculator, or get in touch with our team.
Policy snapshot as of July 2026. State policy, tender terms, discovered tariffs and VGF eligibility change by government notification; verify current provisions with BSPGCL / BSPHCL / BERC / Ministry of Power documents before financial decisions.