Locked-in energy storage: JSW, Bondada deals in 2025

Why locked-in storage capacity is being tracked closely

India’s grid-scale Battery Energy Storage System (BESS) pipeline is increasingly being discussed in terms of “locked-in” capacity, meaning projects that are tied up through awards, auctions, or long-term purchase agreements. This matters because storage timelines, tariffs, and funding support directly shape how quickly renewable energy can be firmed up for state utilities and distribution companies. Recent disclosures highlight new solar-plus-storage execution work for an EPC player, and fresh standalone BESS contracting by a large power producer. Together, these updates add more clarity on near-term commissioning timelines and the longer-term buildout plans being cited by developers.

Bondada Engineering wins NTPC Renewable solar-plus-storage order

Bondada Engineering Ltd said it has secured an order worth ₹1,338.03 crore (including taxes) from NTPC Renewable Energy Ltd. The notification of award covers the establishment of a 250 MW solar photovoltaic (PV) plant integrated with a 50 MW/200 MWh BESS at Sitapur in Uttar Pradesh. The company said the project is expected to be completed within 18 months from receipt of the award.

For Bondada, the package is positioned as a milestone in its expanding clean energy portfolio. The project structure is notable because it combines generation (solar PV) with storage (BESS) at the project level, a configuration increasingly being used to manage intermittency and improve scheduling. While the disclosure does not detail the full scope beyond capacity and location, the award size and delivery window provide a concrete view on execution requirements.

What the Sitapur configuration implies

The BESS portion of the Sitapur project is stated as 50 MW/200 MWh, indicating a four-hour storage duration based on the disclosed MW and MWh figures. Such durations are typically designed to shift energy from solar-rich hours into evening demand windows and to provide grid support, depending on dispatch requirements. The solar PV component is disclosed as 250 MW.

The 18-month completion expectation sets a relatively tight schedule for engineering, procurement, and construction activities, alongside integration of storage systems. It also implies that the contracting counterparty, NTPC Renewable Energy Ltd, is moving ahead with operationalising hybrid renewable assets in Uttar Pradesh.

Bondada’s updated EPC and storage order books

Following the order win, Bondada Engineering said its solar EPC order book has expanded to approximately 5.5 GWp. It also said its BESS order book has increased to nearly 1.1 GWh. These figures give investors a sense of the company’s pipeline breadth beyond a single project.

Importantly, the order-book disclosure separates solar EPC capacity (in GWp) from storage capacity (in GWh), which helps track execution complexity across two different supply chains. The company has not provided a project-wise split within the stated totals in the provided information.

JSW Energy: locked-in storage capacity and new BESPA in Rajasthan

JSW Energy has disclosed a total locked-in energy storage capacity of 29.3 GWh. It also broke this number into 2.9 GWh of battery energy storage and 26.4 GWh of pumped hydro storage. Separately, it stated that a storage agreement has been signed for 25.2 GWh storage capacity.

On contracting activity, JSW Energy, through its step-down subsidiary JSW Renew Energy Thirty Seven, signed a 12-year battery energy storage purchase agreement (BESPA) with Rajasthan Vidyut Utpadan Nigam (RVUNL). The agreement is for a 250 MW/500 MWh standalone BESS project in Rajasthan under a build, own and operate (BOO) model. The tariff disclosed for the contract is ₹224,000 per MW per month.

JSW Energy’s Kerala win in SECI’s standalone BESS auction

JSW Energy also won Solar Energy Corporation of India’s (SECI) auction to set up a 125 MW/500 MWh standalone BESS in Kerala. The company quoted a tariff of ₹441,000 per MW per month. The project is linked to the Mylatti 220 kV substation in Kasaragod.

The tender was floated in December (as stated in the provided information). The project is required to be commissioned within 15 months of signing the BESPA. The implementation can be carried out in three phases, starting with an initial phase covering 50% of the MWh capacity, followed by up to two additional phases.

Viability gap funding terms disclosed for the Kerala project

For the Kerala project, JSW Energy will be eligible for viability gap funding (VGF) of ₹0.27 crore per MWh (₹2.7 million per MWh) or 30% of the project’s capital cost, whichever is lower. This detail is material because it directly affects project viability and can influence bidding behaviour in storage auctions.

While the disclosure does not specify the total VGF amount that may accrue to the project, the per-MWh cap and the percentage cap provide boundaries for potential support. These caps can matter in a segment where upfront capital costs are significant and revenue is contracted through monthly MW-based tariffs.

O2 Power Platform acquisition and storage development pipeline

The provided information also references an O2 Power Platform (4.7 GW) that was acquired for ₹12,468 crore. It is described as adding a blend of solar, wind, and hybrid projects.

In addition, the same context mentions that energy storage development is active for 40 GWh, including BESS and pumped hydro storage projects. The excerpt does not specify ownership or timelines for this 40 GWh development figure beyond stating it is being actively developed.

Key facts table: projects, capacities, tariffs, timelines

Market impact: what changes on paper, without guessing the next move

For Bondada Engineering, the immediate quantifiable impact is an increase in its stated solar EPC order book to about 5.5 GWp and its BESS order book to nearly 1.1 GWh after the NTPC Renewable award. These numbers indicate higher execution visibility, but they also imply delivery obligations within a defined 18-month window for the Sitapur project.

For JSW Energy, the updates reinforce its focus on contracting long-duration storage through a mix of BESS and pumped hydro. The company’s disclosed locked-in energy storage capacity stands at 29.3 GWh, with 2.9 GWh in battery storage and 26.4 GWh in pumped hydro storage. The Rajasthan and Kerala BESS announcements add detail on pricing constructs, with monthly MW-based tariffs disclosed at ₹224,000 per MW per month (Rajasthan) and ₹441,000 per MW per month (Kerala), and commissioning requirements stated for the Kerala project.

Analysis: why these disclosures matter for India’s storage buildout

Two themes stand out from the disclosed facts. First, hybridisation is advancing through project-level integration, as seen in the 250 MW solar PV plus 50 MW/200 MWh BESS award at Sitapur. Second, standalone BESS contracting is increasingly moving into longer-tenor frameworks, such as the 12-year BESPA signed with RVUNL for the Rajasthan project.

The Kerala auction outcome highlights the role of VGF structures in supporting standalone storage economics. The disclosed cap of ₹0.27 crore per MWh (or 30% of capital cost, whichever is lower) provides a measurable support mechanism tied to installed energy capacity.

Finally, the mention of active development of 40 GWh across BESS and pumped hydro, and the acquisition of a 4.7 GW platform for ₹12,468 crore, underlines the broader scale at which storage is being planned alongside renewables, even when project-specific details are not fully laid out in brief disclosures.

Conclusion

Bondada Engineering’s ₹1,338.03 crore Sitapur solar-plus-storage award and JSW Energy’s Rajasthan BESPA and Kerala SECI win show how India’s storage pipeline is being formalised through awards, auctions, and long-term contracts. The next concrete milestones to watch, based on the disclosed information, are the Sitapur project’s 18-month delivery window and the Kerala project’s requirement to be commissioned within 15 months of BESPA signing.