/daily ·15 JUL 2026 ·WEDNESDAY ·3 MIN READ ·8 STORIES

Records fall, costs diverge

Solar cell efficiency hit new highs in the lab while battery storage economics split along geopolitical lines — the day's biggest moves ran from a Chinese efficiency record to a Belgian financing close to the FAA's first long-range electric flights.

01 / The Day

WEDNESDAY 15 JUL 2026, ranked

LONGi logs 35.5% perovskite-silicon tandem record

LONGi certified a 35.5% efficient perovskite-silicon tandem cell in the lab, eclipsing its own April 2025 mark of 34.85%. The gap between lab and production still yawns, but each fraction of a percentage point on this curve narrows the eventual cost per watt.

Why it mattersPerovskite-silicon tandems are the most commercially credible route beyond single-junction silicon limits; this certified record sets the ceiling the manufacturing race is now chasing.

01 pv-magazine.com↗

Beta flies 275 nm under the FAA's electric aviation pilot

Beta Technologies completed the first electric conventional takeoff-and-landing flights under the FAA's eVTOL Integration Pilot Program, covering 275 nautical miles across Virginia and Maryland — including an organ-delivery run with United Therapeutics.

Why it mattersFAA-sanctioned multi-state electric flight operations mark the transition from demonstration to operational proof, the threshold that matters for type certification timelines and commercial service approvals.

02 betaaviation.com↗

Transgrid backs 900 MW of grid-forming batteries for NSW

Australia's transmission operator Transgrid will deploy 900 MW of grid-forming battery storage alongside eight synchronous condensers to maintain system strength as New South Wales coal plants retire through the early 2030s. Grid-forming inverters synthesize inertia rather than simply following the grid — a meaningful technical distinction at this scale.

Why it mattersA transmission network operator committing 900 MW to grid-forming batteries in a single system is the clearest evidence yet that the technology is leaving the pilot stage and entering infrastructure planning.

03 pv-magazine.com↗

Giga Storage locks €450M for Belgium's 2.8 GWh grid battery

Dutch owner-operator Giga Storage secured €450 million to finance its 700 MW / 2,800 MWh Green Turtle project in Belgium, clearing the last major hurdle before construction on one of Europe's largest single BESS projects.

Why it mattersProject financing at this scale sets the bankability template for gigawatt-hour grid storage in Europe, where financing risk — not technology — has been the main obstacle to construction.

04 energy-storage.news↗

CSIRO cuts battery cost forecast, raises pumped hydro

Australia's CSIRO GenCost 2025-26 final report revised battery storage costs downward and pumped hydro costs upward, widening the gap between the two long-duration contenders. The hydro revision reflects ongoing construction blowouts; the battery revision reflects continued LFP price pressure from Chinese manufacturers.

Why it mattersGenCost is the reference cost benchmark for Australian grid investment decisions; a pumped-hydro revision of this magnitude reallocates gigawatts of planned pipeline toward batteries.

05 energy-storage.news↗

Solar hit 25% of EU power in June — a first

Solar accounted for a quarter of European Union electricity generation in June 2026, surpassing every other source for only the third time ever and crossing the 25% mark for the first time. The 52 TWh generated beat coal, gas, nuclear, and wind in the same month.

Why it mattersAt 25% share in a continent-scale interconnected grid, solar is no longer a niche contributor — it now sets the dominant variable shaping European grid operations and dispatch decisions.

06 cleantechnica.com↗

Lazard: US storage costs rose after Chinese cell curbs

Lazard's latest levelized cost of storage analysis shows US utility-scale battery costs increased after FEOC restrictions curtailed access to Chinese cells, reversing the downward trend seen through 2025. Markets without those restrictions continued to see cost declines driven by Chinese LFP pricing.

Why it mattersThe analysis puts a dollar figure on supply-chain decoupling for grid storage — essential data for anyone modeling the true cost of domestic battery manufacturing mandates.

07 energy-storage.news↗

Masdar closes financing on 5.2 GW / 19 GWh round-the-clock project

Masdar reached financial close on a project pairing 5.2 GW of solar with 19 GWh of storage, structured to deliver 1 GW of firm continuous power around the clock. The ratio — oversized solar firmed by deep storage — is the most capital-intensive proof yet that dispatchable renewables work at gigascale.

Why it mattersA 19 GWh storage commitment in a single project sets a new high-water mark for the storage industry, proving project finance appetite for round-the-clock renewable power without gas backup.

08 cleantechnica.com↗

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Past days

The Daily Archive

/SAT 01 AUGThe Heat Is the Story /FRI 31 JULCalifornia hits 51% monthly solar; China sets record targets /THU 30 JULThe Billion-Dollar Build Edition /WED 29 JULWednesday, 29 July — Sodium-ion arrives; Australia breaks records /TUE 28 JULMalaysia orders the grid; Australia scales the cell /MON 27 JULA Solar Farm Becomes a Data Centre, Wisconsin Campaigns Against Solar, and LONGi Breaks the Tandem Efficiency Record /SUN 26 JULThe Build-Out Accelerates /SAT 25 JULUS battery storage breaks Q1 record; China tightens polysilicon /FRI 24 JULShock and Shine /WED 22 JUL194 gigawatts and a record solar cell /TUE 21 JULStorage everywhere, blockages everywhere /SUN 19 JULTwo US LFP milestones, one weekend /SAT 18 JULOvercapacity meets the taxman /FRI 17 JULFriday in Energy: Sodium Scales, Silicon Shines /WED 15 JULRecords fall, costs diverge /MON 13 JULSolid-state gets a quality stamp /SAT 11 JULThe grid just got bigger /FRI 10 JULSodium, Zinc, and CO2: Storage Diversifies Its Chemistry /THU 09 JULThe grid bottleneck, the cell plant, and the inverter ban /WED 08 JULLDES lands, sodium-ion signs 60 GWh, and US solar manufacturing hits 3 GW /TUE 07 JULSodium Goes Commercial