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/daily ·19 OCT 2026 ·MONDAY ·2 MIN READ ·7 STORIES

Solar Records, AI Batteries, and a Geothermal First

Monday delivered on multiple fronts: JinkoSolar hit 28% cell efficiency, Tesla's Texas solar plant revealed 10 GW scale, xAI became a stealth major battery operator, and enhanced geothermal power crossed the utility-scale threshold for the first time.

01 / The Day

MONDAY 19 OCT 2026, ranked

07

JinkoSolar Hits 28% with Rear-Contact TOPCon-HJT Hybrid

JinkoSolar unveiled its TAC cell, combining TOPCon and amorphous-silicon heterojunction contacts on the rear face to reach 28% peak efficiency. The back-contact design eliminates front-side metal shading losses.

  • 28% peak efficiency is among the highest confirmed for mass-producible silicon cells
  • TAC places tunnel-oxide passivation and heterojunction contacts entirely on the rear
  • Back-contact architecture removes front-metal shading, lifting current density
Why it mattersSilicon cells approaching 28% start to compete with bespoke tandems at a fraction of the manufacturing complexity.
01 pv-magazine.com↗

Patent Case Reveals Tesla Texas Solar Plant is Tooled for 10 GW

A patent dispute in East Texas surfaced documents showing Chinese crystal-pulling equipment is bound for Tesla's $10B Fort Bend County solar complex. At 10 GW of ingot-and-wafer capacity, the facility would rank among the largest of its kind outside China.

  • Patent filings name East Texas as the destination for large-scale ingot-growing equipment
  • Fort Bend site targets full ingot-to-wafer integration, not just downstream assembly
  • 10 GW ingot capacity implies roughly 10 million solar panels annually
Why it mattersThe scale confirms Tesla is building a genuine full-stack US solar supply chain, not just an assembly line.
02 pv-magazine.com↗

xAI Has Quietly Become One of America's Biggest Battery Operators

Satellite imagery shows 720 Tesla Megapacks at xAI's Colossus data centre campus in Memphis, likely the largest single-site battery in the US at an estimated 1.4-2.9 GWh. The deployment was never publicly announced.

  • 720 Megapacks at standard capacity implies roughly 1.4-2.9 GWh total storage
  • No grid interconnection filings or public announcements accompanied the build
  • The Colossus site previously drew scrutiny for running methane generators during construction
Why it mattersHyperscale AI compute is now a primary driver of large-battery procurement, outpacing many utilities in single-site scale.
03 canarymedia.com↗

Fervo Cape Station: World's First Utility-Scale Next-Gen Geothermal

Fervo Energy began delivering power to the grid from Cape Station in Utah, the first enhanced geothermal system to reach commercial utility scale globally. The project uses horizontal drilling and hydraulic stimulation adapted from oil and gas.

  • EGS technology works in geologically ordinary rock, not just volcanic or hotspot zones
  • Cape Station delivers power under a long-term purchase agreement with Google
  • Fervo signed a roughly 400 MW follow-on deal with Google, the largest next-gen geothermal agreement on record
Why it mattersA working utility-scale EGS plant transforms geothermal from a regional niche into a credible baseload decarbonisation option.
04 canarymedia.com↗

European Integrators Plan CATL Sodium-Ion BESS Deployments in 2027

Intilion and Merus Power, two European battery system integrators, said they expect to deploy CATL sodium-ion cells in commercial grid storage projects as soon as next year, citing cost and supply-chain diversification over lithium chemistry.

  • Sodium-ion cells eliminate lithium, nickel, and cobalt from the chemistry
  • CATL is currently the only supplier with sodium-ion at commercial-scale production readiness
  • Both integrators signalled 2027 deployments are highly likely, not contingent on further cost reductions
Why it mattersEuropean commercial deployment of sodium-ion would establish a second viable grid storage chemistry well before 2030.
05 energy-storage.news↗

India Clears $19.3B Grid Expansion With 50 GWh of Storage

India's Union Cabinet approved Green Energy Corridor Phase III, a $19.3 billion transmission and storage programme including approximately 50 GWh of battery capacity to integrate renewable generation from high-resource states into demand centres.

  • 50 GWh of BESS is among the largest single-country storage mandates globally
  • The corridor connects renewable-heavy Rajasthan and Gujarat to the industrial north and east
  • India's battery sector remains import-dependent, making domestic manufacturing a parallel priority
Why it mattersA cabinet-level commitment at this scale shifts India from a pilot storage market into a top-tier global demand driver.
06 energy-storage.news↗

Australia's Home Battery Installs Hit 276,000, Up 52% in First Half

Australian households installed 276,011 residential battery systems in H1 2026, a 52% year-on-year increase now outpacing rooftop solar installation growth rates.

  • Growth driven by falling costs and Australia's national home battery incentive programme
  • Battery installs now growing faster than new rooftop solar, suggesting the storage gap is closing
  • Rising VPP enrolment converts residential batteries into dispatchable grid assets
Why it mattersAustralia's residential battery market sets the reference trajectory for Europe and North America as costs continue declining.
07 energy-storage.news↗
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The Daily Archive

/FRI 30 OCTLG and Tesla; Sodium Goes National; BYD Goes European/THU 29 OCTCATL goes big, sodium-ion finds its data centre customer, and China owns electrolysers/WED 28 OCTWednesday: Virtual Gigawatts, Weird Reactors, One Surrender/TUE 27 OCTSolar Tops Nuclear, and the Grid Keeps Moving/MON 26 OCT2026-10-26/SUN 25 OCTWhen the data centres blink/SAT 24 OCTKorea's grid flipped, Google's running a power plant/FRI 23 OCTSonnen Falls, Waratah Scales, BNEF Calls 2026 Peak Storage/THU 22 OCTGigawatts of intent, from Kentucky to the outback/WED 21 OCTWednesday: 400 Wh/kg, Anode-Free Sodium, New York Goes Thermal/TUE 20 OCTSolid-state graduates, seafloor sparks/MON 19 OCTSolar Records, AI Batteries, and a Geothermal First/SUN 18 OCTGrid Foundations/SAT 17 OCTTechnology War Saturday/FRI 16 OCTThe Build vs. the Setback/THU 15 OCTThe Energy Brief — October 15, 2026/WED 14 OCTCells and Gigafactories/TUE 13 OCTTuesday dispatch/MON 12 OCTThe residential battery surge and the storage giant stirring/SUN 11 OCTThe chemistry and the credibility/SAT 10 OCTSaturday Grid