/daily ·09 AUG 2026 ·SUNDAY ·2 MIN READ ·6 STORIES

12.8 GWh in China, solar tariff shock, and RWE's billion-dollar exit

The world's largest battery cluster is now live in China, solar panels got a new tariff, and RWE paid $1.2 billion to leave US offshore wind. Clean-energy transition, as usual, proceeding on its own schedule.

01 / The Day

SUNDAY 09 AUG 2026, ranked

World's largest 12.8 GWh battery storage cluster activated in China

A 12.8 GWh battery energy storage system — the largest single installation on record — went live in Inner Mongolia. The cluster uses lithium iron phosphate cells and connects directly to a regional transmission backbone serving northern China's grid.

Why it matters12.8 GWh is more storage than most countries have deployed cumulatively. China is not waiting for grid storage economics to improve; it is installing at a scale that drives the economics.

01 cleantechnica.com↗

Trump administration announces Section 232 tariffs on solar panels and wafers

The White House invoked Section 232 national-security authority to impose new tariffs on imported solar panels, modules, and silicon wafers, primarily targeting Chinese manufacturing. Rates and implementation timelines were not immediately specified.

Why it mattersSection 232 solar tariffs would significantly increase US solar project costs at a moment when utility-scale deployment is accelerating. The policy tension between energy security and climate economics is now explicit.

02 canarymedia.com↗

RWE pays $1.2 billion to exit US offshore wind portfolio

German energy giant RWE agreed to pay $1.2 billion to terminate its US offshore wind development agreements, citing unworkable economics under current policy conditions. The exit follows similar moves by BP, Equinor, and Orsted.

Why it mattersRWE's exit is notable because it is paying to leave, not just writing down an asset. The scale of the break fee signals how fundamentally US offshore wind economics have shifted.

03 heatmap.news↗

US battery storage capacity grew 70% per year for three consecutive years

DOE data shows US grid-connected battery storage capacity has averaged 70% annual growth over the last three years, reaching over 50 GW of installed capacity. Most of that growth is in four-hour lithium-iron-phosphate systems.

Why it matters70% CAGR over three years is extraordinary for any energy technology. The US storage build-out is accelerating faster than almost any grid model predicted.

04 cleantechnica.com↗

Michigan voters to decide on data center grid cost allocation

Michigan approved a ballot measure for November asking voters whether electricity cost increases caused by data center load growth should be socialised across all ratepayers or charged directly to the data center operators. Several major tech companies are opposing the measure.

Why it mattersThe question of who pays for AI infrastructure's grid impact is going to the ballot box. Whatever Michigan decides will be watched by every state with a data center pipeline.

05 heatmap.news↗

DOE closes $489M loan for Puerto Rico battery storage project

The US Department of Energy finalised a $489 million loan guarantee to Pattern Energy for a combined battery energy storage system and peaking natural gas facility in Puerto Rico, part of the island's post-Maria grid rebuilding effort.

Why it mattersThe loan pairs storage with gas — a combination that draws fire from clean-energy purists but reflects the reality of rebuilding an island grid that still needs firm capacity. The economics are instructive.

06 energy-storage.news↗

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Past days

The Daily Archive

/SUN 09 AUG12.8 GWh in China, solar tariff shock, and RWE's billion-dollar exit /FRI 07 AUGUS hits polysilicon; Ørsted stacks 500 MWh in Texas /THU 06 AUGGrid delays, grid storage, and grid-scale bets /WED 05 AUGHome batteries scale up, microreactors raise $1B, and China ends the solar price war /MON 03 AUGFusion gets its billion; perovskite breaks 28%/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