/daily ·02 AUG 2026 ·SUNDAY ·2 MIN READ ·5 STORIES

Surplus signals

Italy's grid is generating so much solar it is running out of places to put the price, Chinese module costs keep falling, and CATL's sodium-ion specs are finally public.

01 / The Day

SUNDAY 02 AUG 2026, ranked

CATL publishes sodium-ion Tener container specs for grid scale

CATL disclosed technical specifications for its Tener sodium-ion battery energy storage container — including capacity, cycle life, and cell-level chemistry details — giving developers and buyers the first concrete datasheet on the product since its commercial announcement.

Why it mattersPublished specs convert a capability claim into a procurement-ready product; the cycle-life and $/kWh numbers will determine whether sodium-ion becomes competitive with LFP in long-duration grid applications.

01 energy-storage.news↗

Italy hit 88 hours of zero electricity prices in the first half of 2026

Italy's wholesale electricity market logged 88 hours at zero or negative prices in H1 2026 — more than double the same period in 2025 — driven by solar overproduction during midday peaks, with the trend expected to accelerate in H2.

Why it mattersZero-price hours are the economic signal that a grid has more solar capacity than storage or flexibility to absorb it; the 2x acceleration means Italy's grid management challenge is arriving faster than investment in storage and demand response.

02 pv-magazine.com↗

Chinese TOPCon module prices drop as high-efficiency supply grows

Average prices for Chinese n-type TOPCon solar modules declined further in July as manufacturers continue expanding capacity faster than demand grows — a pricing dynamic that is pushing module manufacturers' margins to the floor while reducing the cost of utility-scale solar projects globally.

Why it mattersTOPCon has become the new efficiency baseline; when its price falls to parity with older PERC technology, the entire solar module cost floor resets downward.

03 pv-magazine.com↗

Aecon executes 1.2 GWh Ontario battery storage agreement

Aecon signed a contract to deliver a 1,200 MWh battery energy storage system in Ontario — one of the largest grid-scale battery contracts in Canadian history, coming as Ontario faces capacity constraints from industrial load growth and nuclear refurbishments.

Why it mattersCanadian provinces are now competing to sign large-scale storage before available capacity is booked; Ontario's 1.2 GWh sets a new domestic scale reference for the market.

04 energy-storage.news↗

UK cumulative solar capacity hits 22.8 GW

UK solar capacity has reached 22.8 GW across all installation types, confirmed as the country prepares to launch a consumer plug-in solar market that would allow households to connect small solar panels without full installation permits.

Why it mattersThe timing matters: plug-in solar could add significant distributed capacity quickly if the regulatory launch succeeds, and 22.8 GW as a baseline shows the UK grid can absorb more than conventional wisdom suggested five years ago.

05 pv-magazine.com↗

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Past days

The Daily Archive

/SUN 02 AUGSurplus signals /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