/daily ·18 JUL 2026 ·SATURDAY ·2 MIN READ ·6 STORIES

Overcapacity meets the taxman

China imposes its first consumption tax on solar cells and battery packs to thin an oversupplied field; every major Chinese module maker forecasts a first-half loss; and a California analysis shows grid batteries are leaving nearly $100M on the table from bad bidding.

01 / The Day

SATURDAY 18 JUL 2026, ranked

China imposes first-ever consumption tax on PV cells and batteries

China's Ministry of Finance announced a 2% consumption tax on photovoltaic cells and battery products, rising to 4% in 2028, combined with tighter energy-efficiency standards — a deliberate consolidation push aimed at clearing marginal producers from both sectors.

Why it mattersThe first consumption tax on solar and battery manufacturing from the country that produces ~80% of global supply will ripple through module prices, project economics, and FEOC calculations in ways that will take months to fully price in.

01 pv-magazine.com↗

Tongwei, LONGi, JA Solar, and Trina all forecast H1 losses on persistent oversupply

Four of China's largest solar manufacturers released preliminary H1 2026 guidance showing losses as polysilicon overcapacity and weak demand continue to compress margins below break-even. The slide has continued despite earlier rounds of announced capacity cuts.

Why it mattersWhen the four dominant producers in a sector lose money simultaneously, consolidation is not a forecast but an inevitability; the industry will be smaller and likely more concentrated on the other side.

02 pv-magazine.com↗

China's 150 GW battery fleet pivots from installed capacity to actual dispatch

Ember analysis finds China's grid-storage fleet — 150 GW of lithium-ion by Q1 2026, targeting 300 GW by 2030 — has shifted from capacity added under co-location mandates (removed in February 2025) to revenue-generating market participation, with utilisation hours rising sharply.

Why it mattersInstalled capacity that does not dispatch is irrelevant to grid management; rising utilisation means the world's largest battery fleet is becoming a functional grid tool rather than a regulatory checkbox.

03 pv-magazine.com↗

California grid batteries left $98M on the table from suboptimal bidding

A Gridmatic analysis of California ISO market data found grid-scale battery operators forfeited approximately $98 million in potential revenue through suboptimal bidding strategies — a software and market-operations problem, not a hardware one.

Why it mattersThe gap between installed battery capacity and optimally dispatched capacity is itself a market inefficiency; the $98M figure quantifies exactly what algorithmic trading and better optimisation can capture.

04 energy-storage.news↗

Eos Energy wins DoD Golden Dome energy storage contract

Zinc-hybrid-cathode battery maker Eos Energy announced a strategic partnership with the US Department of Defense to deploy storage for Golden Dome national defence infrastructure — the company's first significant defence contract.

Why it mattersThe DoD putting non-lithium, domestically manufactured batteries into critical national infrastructure validates zinc-chemistry storage at a strategic level and opens a procurement pathway that sidesteps FEOC restrictions on lithium imports.

05 energy-storage.news↗

Senate bill would halve grid interconnection wait from 8 years to 4

Senator Martin Heinrich introduced the BASED service legislation, modelled on Texas's streamlined interconnection framework, that would allow simpler power plants to connect to the US grid in under four years rather than the current average of eight.

Why it mattersThe interconnection queue is the single largest obstacle to US solar and storage deployment; a bill that halves the wait time is worth more to the energy transition than another efficiency record.

06 heatmap.news↗

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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