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  • Energy Is Up 44%. Traders Only See One Reason.

Energy Is Up 44%. Traders Only See One Reason.

Goldman says U.S. data center demand jumps from 41 GW to 66 GW. The grid can't build that fast.

The Capital Current
The Capital Current

Sep 2, 2026

• THE GRID

Two Engines Hiding in One Rally

Forty-four percent.

That's how much the S&P 500 energy sector has gained this year. In eight months. It's led all sectors in four of them.

Ask a trader why, and you'll hear one word. Iran.

Fair enough. The war pushed oil past $100 a barrel — the first time since 2022. The Strait of Hormuz carries about 20% of the world's oil and gas. When it tightened, prices spiked. Brent surged 50%.

The damage shows up at home. ITEP calculates the average American household has paid $634 in extra energy costs since the conflict began in February. If prices hold through fall, that climbs to $658.

But oil is only one engine.

The second is quieter. I think it runs longer.

Data centers.

I've been tracking this all year. The pace keeps stunning me. Gartner says global data center electricity use will hit 565 terawatt hours in 2026. Up 26% from 447 terawatt hours last year. That's more power than most countries consume.

Goldman Sachs projects U.S. data center demand alone will jump from 41 GW this year to 66 GW next year. The grid can't build that fast.

S&P Energy YTD
+44%
WTI Crude Oil
>$100/bbl
DC Power Use 2026
565 TWh
Household Extra Cost
+$634

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The two stories used to sit in separate boxes. War over here. Tech buildout over there.

Not anymore.

In July, RBC Capital Markets reported five confirmed attacks on Gulf data centers since the war began. AI infrastructure is now a strategic military target. Energy supply and compute supply are tangled in the same knot.

The firms building data centers in the Gulf need stable power. The war is taking it away.

❝

"While data centers remain a key growth driver, we are benefiting from robust demand across our end markets."

— Paulo Ruiz, CEO, Eaton Corporation, Q2 2026 earnings release (July 31, 2026)

Equipment makers feel both forces at once. Eaton posted record Q2 sales of $8.5 billion — up 21%. Electrical Americas orders surged 41%. The war drives demand for grid hardening. AI drives demand for power distribution. Both hit the same factory queue.

The whole supply chain — turbines, transformers, switchgear — is near capacity. Two demand waves. Same parts. Same bottleneck.

26%
Year-over-year growth in global data center electricity consumption, 2025 → 2026 (Gartner)

That $634 household figure only counts the war premium. It doesn't include rising power bills from data center load growth. The full price tag hasn't been tallied.

Most investors see this rally as an oil trade. Or an AI trade. Almost nobody trades it as both.

Two engines. Same sector. When one cools, the other still carries. This rally has more runway than the bears admit.

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• WIRED IN

Signals From the Wire

  • GE Vernova launched a new medium-voltage UPS on August 24 — built for data centers and AI factories. The system sits between the power supply and critical loads. It holds voltage and frequency steady during disruptions. Power quality is becoming as important as power quantity in the AI age.

  • Speaking of on-site power: FuelCell Energy signed a deal with Fit Energy in June for an initial 30 MW of fuel cell capacity. Delivery starts this year. The agreement came with an immediate deposit — a sign buyers aren't kicking tires anymore.

  • A name most people don't know: Willdan Group. The grid services and engineering firm crushed Q2 estimates. Revenue hit $117.2 million versus $102.3 million expected. Adjusted EPS: $2.07 vs. $1.34 forecast. Shares jumped 14%. The company raised full-year guidance to $415–$430 million. Utilities need engineers to manage the data center surge. Willdan has them.

  • The buildout is going global. ByteDance broke ground on a $39 billion data center campus at Brazil's Pecém port complex. It starts at 200 MW with plans to reach 1 GW. First data hall expected online by late 2027. It's ByteDance's largest facility outside China — and another mouth for the global grid to feed.

Every signal — from UPS gear to fuel cells to a $39 billion campus in Brazil — points the same direction: more power, everywhere, faster.

• VOLTAGE

The Night the Batteries Took Over

July 9. Sunset in California. Demand peaked. Air conditioners hummed. Dinner cooked.

For years, that moment meant one thing: fire up the gas plants.

This time, batteries went first.

California's fleet discharged a record 12.99 gigawatts in a single evening. That's more power than New York City uses on a hot summer day. At peak, batteries covered 36% of all demand on the CAISO grid.

12.99 GW
Record single-evening battery discharge — CAISO, July 9, 2026

This fleet barely existed five years ago. U.S. battery storage has grown about 70% per year since 2023. The country ended 2025 with 43.6 GW. Operators added 8.3 GW in the first half of this year. Total: nearly 52 GW.

And the pipeline keeps building. The EIA says developers plan to add 54 GW more through 2028.

Policy explains part of the pace. The One Big Beautiful Bill Act cut the investment tax credit runway for wind and solar to 2027. But storage credits don't start phasing out until 2034. That gap gave batteries a seven-year head start.

It shows. In Q1, solar and storage made up 91% of all new U.S. grid capacity. Highest share ever. In May, solar produced more electricity than coal for the first time in U.S. history.

The day after the battery record — July 10 — solar hit 23 GW on the same grid. It covered 72% of CAISO demand. Two records. Two days. Two technologies. One grid.

Batteries aren't backup anymore. On the evening of July 9, they were the grid.

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