These five entities are essential to this sector's story, but none receives a full 9-page report or a BUY/HOLD/SELL rating here — for a different, specific reason in each case. They are included for context because several of the fourteen rated companies compete with, sell to, or are compared against them throughout this document.
Not rated here because grid-storage and cell manufacturing sit inside a single new-energy vertical of a company whose Refining, Oil & Gas, Retail and Digital Services segments dwarf it — a full valuation exercise on Reliance Industries would be a sum-of-the-parts call on the entire conglomerate, not a grid-storage thesis, and is outside this report's scope. What matters for this primer: Reliance was awarded 15 GWh under the PLI-ACC scheme (5 GWh round 1, 10 GWh round 2) and has publicly reaffirmed, at its June 2026 AGM, a 40 GWh initial-phase battery gigafactory at its Jamnagar Green Energy Giga Complex, scaling toward 120 GWh. Bloomberg reported on 12 January 2026 that Reliance had paused cell-manufacturing plans after failing to secure Chinese cell technology, with talks reportedly stalling after China's Xiamen Hithium withdrew amid Beijing's technology-transfer curbs; Reliance's own spokesperson denied any "pause," and Hithium separately called the reports "materially false" without specifically rebutting the underlying claim that discussions occurred. Neither denial fully closes the question either way — a pattern this report also flags for Amara Raja and JSW in §7 and §9. As of this report's research date, no source confirmed actual commercial cell production had begun at Jamnagar, though Bloomberg reported (19 May 2026) that Reliance was separately in talks with CATL for battery-system components, suggesting continued Chinese-supplier engagement even after the Hithium episode.
Not rated here because storage is a genuinely small, emerging ancillary business layered onto an 89+ GW, overwhelmingly coal-fired generation company — any 12-month total-return call on NTPC stock would be a call on coal-generation economics and NTPC Green Energy's renewables build-out, not on grid storage. What matters for this primer: NTPC's subsidiary NVVN has awarded standalone BESS tenders (a 250 MW/500 MWh Kerala award to Shreyas Sortex Industries, Feb 2026), and NTPC's own parent-level BESS auction covering 2,334 MWh returned results in April 2026. NTPC's stated ambition is to pair a 149 GW generation fleet with 1 GW of pumped storage and 22 GWh of BESS by 2032 — real, but against a base this large, storage will remain a rounding error in NTPC's investment case for years.
Not given a full report because its core, revenue-generating business remains electric two-wheelers — and that core business is in genuine distress: FY26 revenue fell ~50% YoY to ₹2,253cr, the net loss widened to ₹1,833cr, ROE sat at −43.2%, and free cash flow was −₹1,492cr, with a ₹1,000cr rights issue approved 28 Sep 2026. Against that backdrop, the grid-storage story is real but young: Ola launched three BESS products on 15 Aug 2026 under "Ola Mahashakti" — residential, commercial ("Shakti Rack") and grid-scale ("Mahashakti") tiers — built on Ola's own in-house LFP/4680-format cells from its Krishnagiri gigafactory (~2.5 GWh operational against a 20 GWh PLI-ACC award), and signed its first Mahashakti MoU with a developer called Axis Energy for up to 20 GWh of deployment by 2032, a deal that pushed the stock up ~10-11% in a single session. Axis Energy checks out as a real, if mid-sized, renewable developer — it has a verified 400 MW solar project built with Lumara, a Brookfield-backed Indian platform — but it is not a large utility, no independent corporate profile (founder, HQ, balance sheet) could be located, and the MoU itself is non-binding for a very large multi-year target. No Mahashakti-specific capacity, chemistry, or pricing details beyond the launch announcement were found (an earlier-reported ₹99,999 starting price could not be re-confirmed; the closest verified figures, ₹1,49,999 and ₹2,49,999, describe the separate residential "Ola Shakti" product line), no deals beyond Axis Energy have been announced, and — despite the stock's rally — no sell-side brokerage report was found that re-rates Ola Electric specifically on the Mahashakti story; the most recent post-launch coverage located (Goldman Sachs, Aug 2026, Neutral) still frames the stock around legacy EV cash-burn. Mahashakti is real strategic optionality on top of a distressed core business, not yet a rateable business of its own.
Surfaced by the same completeness audit that added the six new full reports elsewhere in this document, but placed here rather than rated after deeper research found the company had just moved away from grid-scale storage, not toward it. Prostarm's core business is commercial/industrial backup power — UPS systems, lift inverters, voltage stabilisers — sold into banking, healthcare, airports, railways and oil & gas, with lithium-ion battery packs historically deployed inside that same backup-power context rather than for grid-scale use. In April 2026 the company signed an MoU with China's Shenzhen Topband to explore a dedicated BESS-manufacturing partnership — the one identifiable step toward genuine grid-scale storage found anywhere in Prostarm's public disclosure — and on 28 September 2026, one day before this research was conducted, cancelled that MoU, stating the project "lacked technical and economic feasibility" amid "market changes" and a "strategic realignment" of priorities. A new 1.2 GWh nameplate "BESS" plant in Jhajjar, Haryana began commercial operations three days before the cancellation (25 Sep 2026), alongside new UPS/lithium and servo-stabiliser units — but independent commentary on the launch describes even this new capacity as serving "power-quality and backup demand across commercial and industrial customers," consistent with an unverified secondary-source claim that management is explicitly "shifting from low-margin utility storage to commercial and industrial customers." Working capital has also deteriorated sharply (working-capital days nearly tripled, 65 to 183, in FY26). Given the one dedicated grid-BESS initiative found in Prostarm's history was abandoned a day before this research ran, this report treats Prostarm as a backup-power company with residual, currently-receding storage optionality — not a grid-storage stock — and does not assign it a rating.
Not rated here because it is not separately listed on any stock exchange — it is an 88%-Tata-Sons-owned private company (the remaining 12% held by technology partner AESC, since March 2025), and cannot be bought or sold independently of Tata Sons itself. It is also, importantly, a distinct legal entity from Tata Power Company Ltd (TATAPOWER, rated HOLD in this report) — the two should not be conflated, and Tata Power's own report explicitly notes it has no cell-manufacturing ambition of its own. What matters for this primer: Agratas' Sanand, Gujarat facility (Phase 1, 20 GWh, ~$1.58bn investment) has completed its main production-building steel frame and is installing key process equipment, with commercial production targeted for CY2027; a parallel £4 billion, 40 GWh Bridgwater, UK plant (backed by a £380 million UK government grant confirmed April 2026, and anchored by Jaguar Land Rover as its flagship customer) is under construction on a broadly similar timeline. Bloomberg reported on 4 August 2026 that Agratas is building its Sanand pilot line on its own, in-house LFP cell technology, rather than a licensed Chinese process — a notable contrast with Reliance's reported reliance on (and difficulty securing) external Chinese licensing, and worth watching as a second real-world test of whether an in-house technology path can succeed where several licensed ones have stalled.
