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/daily ·23 OCT 2026 ·FRIDAY ·3 MIN READ ·7 STORIES

Sonnen Falls, Waratah Scales, BNEF Calls 2026 Peak Storage

Twenty-three October served up one insolvency, one world-class battery commissioning, and a BloombergNEF dataset that puts 500 GWh per year in the rear-view mirror. Across seven stories: residential storage is harder than it looks, grid-scale BESS is now infrastructure, and manufacturing-phase emissions remain the carbon blind spot no one wants to price.

01 / The Day

FRIDAY 23 OCT 2026, ranked

07

Sonnen Files for Insolvency After Shell Ownership Stint

German home battery manufacturer Sonnen, acquired by Shell in 2019, has filed for insolvency — the largest OEM failure in the residential storage segment to date. The collapse raises pointed questions about Shell's residential energy-transition retail thesis.

  • Sonnen claimed ~300,000 units installed across Europe and North America before filing
  • Shell paid roughly $500M for Sonnen in 2019 as part of its energy-transition pivot
  • Sustained losses through VPP and EV-charging integrations couldn't close the gap
Why it mattersHardware-first home storage remains structurally hard: scale doesn't solve unit economics when installers extract margin and software upsell stays thin.
01 pv-magazine.com↗

Waratah Super Battery Reaches Full Commercial Operation

Akaysha Energy's 850 MW / 1,680 MWh Waratah Super Battery — built on the former Munmorah coal-plant site in NSW — has entered full commercial operation, the largest grid battery by energy capacity in Australia. Over 70% of its liquid-cooled cells were supplied by Rept Battero.

  • Stabilises transmission for Sydney, Newcastle, and Wollongong under NSW Energy Roadmap
  • Rept Battero supplied >70% of cells in a direct coal-to-battery site conversion
  • 850 MW frequency response underpins grid stability as NEM renewables exceed 80%
Why it mattersEach gigawatt-scale BESS that clicks live tightens the link between renewable overbuild and dispatchable reliability — Waratah is the clearest Southern Hemisphere proof point yet.
02 automotiveworld.com↗

BloombergNEF: 2026 Storage Deployments Hit Record 188 GW / 535 GWh

BloombergNEF's updated 2026 forecast projects worldwide battery storage deployments reaching 188 GW / 535 GWh — a 45% surge year-on-year driven by China standalone firming rules, US data-centre capacity buffering, and gigawatt-scale auctions across Europe and Asia. The 500 GWh annual threshold has not been crossed before.

  • China standalone firming mandates are the single largest demand driver in 2026
  • US data-centre build-out is creating a secondary demand wave for behind-the-meter BESS
  • European and Asian gigawatt auctions are pulling in new project-finance structures
Why it mattersCrossing 500 GWh annually normalises storage as grid infrastructure rather than niche premium — market structure from here changes faster than most models assumed.
03 about.bnef.com↗

SEIA: Solar-Plus-Storage Cut Summer Wholesale Power Prices 42–51%

The Solar Energy Industries Association published analysis showing accelerated utility solar and battery co-location drove summer wholesale electricity prices down 42% in Texas (ERCOT) and 51% in California (CAISO). The data quantifies what grid operators had modelled but not measured at this deployment scale.

  • Texas ERCOT saw a 42% summer wholesale price reduction tied to solar-plus-storage
  • California CAISO recorded a 51% drop — highest among US ISO markets in the analysis
  • Battery-backed peak suppression is now a primary price driver, not a supplementary hedge
Why it mattersThe first rigorous wholesale-price dataset at this scale makes the investment case for solar-plus-BESS self-reinforcing: cheaper electricity funds faster build-out.
04 seia.org↗

Net Power Shelves Oxy-Combustion Technology, Pivots to Gas Engines

Net Power, which raised over $300M on a zero-emission natural-gas promise via its Allam-Fetvedt oxy-combustion cycle, has formally shelved the technology in favour of conventional gas reciprocating engines to serve data-centre power demand. The pivot ends a decade-long bet on near-zero-emission dispatchable gas.

  • Net Power's Allam-Fetvedt Cycle — its zero-emission core technology — is discontinued
  • The pivot targets data-centre operators who need fast-despatch gas capacity now
  • Backers including 8 Rivers Capital and Occidental had tied road maps to the cycle
Why it mattersData-centre demand is rewriting project economics fast enough to strand proprietary clean-gas technology before it scales — a cautionary signal for capital-heavy deep-tech energy bets.
05 heatmap.news↗

UL Solutions Formalises Certification Pathway for Modular DC BESS

Safety science organisation UL Solutions has announced a formal certification framework for modular direct-current battery storage systems, targeting cell-to-pack thermal propagation containment and high-voltage modular architectures. The pathway is designed to shorten time-to-market for vendors moving away from monolithic container designs.

  • Addresses thermal propagation containment between modules — the main certification gap
  • Modular DC allows incremental capacity additions without full system recertification
  • Adds modular-swap and live-servicing protocols on top of existing IEC 62933 / UL 9540A
Why it mattersCertification lag has been one of the quieter bottlenecks for next-generation BESS form factors; a formalised pathway removes a structural barrier for the module-based camp.
06 energy-storage.news↗

Study Warns Li-Ion Manufacturing Emissions Could Rise Tenfold by 2050

Researchers from the University of Melbourne, the Chinese Academy of Sciences, and the University of Sheffield warn that battery manufacturing-phase carbon emissions could scale tenfold by 2050 without chemistry shifts — specifically cathode synthesis recycling, longer cell cycle life, and low-temperature refining. The finding directly challenges decarbonisation accounting for EVs and grid storage.

  • Manufacturing-phase emissions are often excluded from EV and BESS lifecycle assessments
  • Cathode recycling and low-temperature refining are the highest-leverage mitigations cited
  • The model uses current growth trajectories — not worst-case scenarios
Why it mattersIf production emissions scale with deployment, the net-carbon case for electrification weakens unless chemistry and refining shift fast — a tension the industry has structurally underpriced.
07 australianmanufacturing.com.au↗
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