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/daily ·24 SEPT 2026 ·THURSDAY ·2 MIN READ ·5 STORIES

Record storage quarter, 100 GW of US panels, and a fight for offshore wind

The US deployed more battery storage in Q2 than any quarter on record. Domestic solar module manufacturing crossed 100 GW of annual capacity. New York and California launched coordinated legal challenges against the offshore wind rollback. Sunrun and Tesla dispatched a record 580 MW from a virtual power plant. And Australia told data centres to power themselves.

01 / The Day

THURSDAY 24 SEPT 2026, ranked

05

US deployed 18.9 GWh of battery storage in Q2 — the largest quarter on record

The American Clean Power Association and Wood Mackenzie Q2 2026 storage monitor recorded 5.4 GW / 18.9 GWh of new BESS capacity, a 17% year-over-year energy increase and a new quarterly record. Average system duration stretched from 2.8 to 3.5 hours, reflecting a shift from frequency regulation to firm capacity.

  • California (CAISO) and Texas (ERCOT) drove the majority of utility deployments
  • 3.5-hour average duration marks a structural shift toward multi-hour storage absorbing midday solar peaks
  • The Energy Storage Coalition's 225 GW by 2032 target requires roughly 25 GW per year — Q2 alone was 5.4 GW
Why it mattersA quarterly deployment 17% larger than the same quarter last year shows the US grid-storage buildout has moved from policy ambition to consistent execution.
01 solarquarter.com↗

US solar module manufacturing reaches 100 GW of annual capacity

PV Magazine analysis shows US solar module production capacity has crossed 100 gigawatts of annual output — a milestone that required $21 billion in capital expenditure across the manufacturing buildout that began after the IRA passed in 2022.

  • 100 GW of module capacity exceeds current annual US installation demand — the US is now a net exporter of some module types
  • The $21B capex was funded primarily through IRA manufacturing tax credits, not utility procurement contracts
  • Blue wafers from foreign manufacturers remain a competitive threat to domestic module margins
Why it mattersA domestic supply chain producing more than it consumes is a qualitatively different policy outcome from one that merely reduces import dependence.
02 pv-magazine.com↗

New York and California launch coordinated fight against Trump offshore wind rollback

New York and California filed coordinated legal challenges against the Trump administration's lease cancellations and permitting freezes on offshore wind projects, arguing that reversing already-contracted projects violates administrative procedures and constitutes an unconstitutional taking of vested contractual rights.

  • New York has more than 4 GW of offshore wind under active procurement affected by federal actions
  • The legal strategy mirrors the successful Solar for All challenge: attacking process, not energy policy substance
  • California's Pacific offshore wind programme, which received DOE loan commitments, faces separate permitting freezes
Why it mattersStates using their own procurement contracts as legal weapons against federal rollbacks could lock in offshore wind capacity regardless of federal policy direction.
03 canarymedia.com↗

Sunrun and Tesla dispatched a record 580 MW from California's virtual power plant

During a September heatwave, the Sunrun-Tesla virtual power plant dispatched 580 MW of demand reduction and battery discharge to the California grid — the largest single VPP dispatch event on record and equivalent to one large gas peaker plant's output, sustained for approximately four hours.

  • 580 MW was sustained through the evening demand peak that traditional gas peakers typically serve
  • The event demonstrates distributed residential storage functioning as dispatchable utility-scale grid capacity
  • Sunrun and Tesla combined enrolled fleet now exceeds 1 GW of capacity across California
Why it mattersA VPP matching a gas peaker's output during an actual heatwave — not a test — makes the policy case for distributed storage much harder to dismiss.
04 energy-storage.news↗

Victoria, Australia requires new data centres to supply their own renewable energy

The state of Victoria introduced a policy requiring new large-scale data centres to demonstrate dedicated renewable energy procurement and contracted storage before receiving grid connection approvals — the first jurisdiction to make additionality a condition of data centre permitting.

  • Policy directly addresses the risk that data centre load growth exhausts grid capacity built for existing users
  • Both co-located and contracted renewable supply with storage qualifies — the requirement is about additionality, not location
  • Multiple Australian states are watching Victoria as a model for managing AI infrastructure load growth
Why it mattersTying data centre permits to energy additionality is a policy innovation that every grid operator managing AI infrastructure growth will eventually face.
05 energy-storage.news↗
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The Daily Archive

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