Reading · Jonathan Maxwell’s Substack

The war premium left the oil price, but stayed in the system — a heat dome tested America’s grid just as the AI build-out’s biggest backers stopped waiting for it, and the bill for four months of conflict arrived, not at the terminal, but on the doormat.

America’s grid met its stress test — and asked the data centres to step aside. A heat dome pushed temperatures above 38°C from Boston to Washington in the run-up to the July 4th weekend, driving electricity demand towards record levels on a system already carrying the AI build-out. The most telling response came from PJM, the largest US grid operator, serving 13 states and the capital: it asked the Department of Energy for authority to order data centres onto their backup generators within fifteen minutes of an emergency signal, freeing capacity for homes and businesses. Note what that is: the grid operator treating its largest, fastest-growing load as its most flexible resource. Demand response is no longer a pilot programme; it is the emergency plan. The context makes the point sharper still — data centres now account for around 4% of US power demand, heading for 9% by 2030 on the DOE’s own figures, and in Henrico County, Virginia, residents opened electricity bills 25% higher this month while schools and businesses were asked to conserve. The heatwave will pass. The load will not.

The largest infrastructure investors concluded the same thing, with $25 billion. On Tuesday, Brookfield expanded its financing framework with Bloom Energy from $5 billion to $25 billion — a fivefold increase in nine months — to deploy Bloom’s solid-oxide fuel cells as on-site power for AI infrastructure globally, within an AI Infrastructure Fund targeting $100 billion. Bloom’s pitch is speed: prefabricated units commissioned in months, against grid connections quoted in years; Oracle reportedly took its first system in 55 days. Brookfield’s head of AI infrastructure described the ambition as delivering everything “from electrons to tokens.” Strip out the language of the term sheet and this is a simple statement: the binding constraint on the fifth industrial revolution is the interconnection queue, and the capital has decided to route around it. Generation close to demand — the EDGE case — is now the product being financed at scale, not the alternative being debated.

Oil went home; the tankers are still working out how. Brent settled below $71 on Thursday, lower than at any point since 27 February — the day before the war began — and down more than 38% from its post-war peak above $126 at the end of April. The path there ran through another dangerous weekend: a drone strike on the tanker M/T Kiku transiting Hormuz with two million barrels aboard, US strikes on ten Iranian military targets in response, and then, on Monday, an agreement to halt hostilities and let commercial vessels move freely. Since then the physical market has been catching up with the financial one: Gulf refiners are back in the spot market, product tenders are flowing, and the backlog of vessels is clearing. But the market may still be celebrating a little ahead of the party. Key issues in the June memorandum remain unresolved, Tehran continues to claim the right to control transit through the strait, insurance rates remain elevated, and at least 49 attacks on commercial vessels have been recorded since February. The price says pre-war. The paperwork does not, yet.

The war arrived on British doormats on Wednesday. Ofgem’s July price cap took effect on the 1st: up 13%, with the rise driven by wholesale gas costs that the regulator attributes squarely to the Middle East conflict. The composition is instructive — gas bills up around 24%, electricity up only around 5% — a reminder of which fuel carries Britain’s geopolitical exposure. Two details deserve more attention than they received. First, the timing: households are paying the war premium months after the oil market stopped charging it, because retail caps look backwards at wholesale windows. The shock outlives the price. Second, buried in the same announcement, Ofgem cut its “typical consumption” values — households now use around 7% less electricity and 17% less gas than at the last review. Efficiency is quietly shrinking the definition of a normal bill. The cheapest response remains the unit you no longer need.

And the oil shock reached the Federal Reserve’s waiting room. Thursday’s US jobs report — released a day early for the holiday (happy birthday USA!) — showed just 57,000 payrolls added in June, half the consensus, with 74,000 jobs revised away from prior months and participation at its lowest since March 2021. Ordinarily that would be a rate-cut story. Not this year: energy-driven inflation has already pushed the Warsh Fed into a hawkish crouch, holding at 3.50–3.75% in June with a dot plot in which nine officials pencilled in at least one hike this year. The soft print took a September hike off the table for traders; it did not put a cut on it. A supply shock that has technically ended is still setting the terms of monetary policy — correlation worth watching, whatever the causation.

The peace that isn’t signed. The US–Iran memorandum remains a framework being negotiated in real time: follow-up talks in Switzerland were abruptly postponed in June, and the two sides continue to give conflicting accounts of what the deal contains. Every barrel of the price decline rests on it holding.

Westminster's coronation, and the energy question it hasn't answered. Andy Burnham now looks all but certain to succeed Keir Starmer — the only declared candidate, with Wes Streeting's backing, and a contest that concludes on 16 July if nobody else clears the bar when nominations open on Thursday. What the energy market is waiting for is less the result than the policy behind it. The record so far points in more than one direction: he appears open-minded on new North Sea licences — enough for Wood Mackenzie to sketch a £7 billion investment upside this week — while also insisting there is "no turning away from net zero," pledging "stronger public control" of energy, and binding himself to the existing fiscal rules. While those positions can coexist, they cannot all be the priority, and Rosebank, Jackdaw and the choice of chancellor will reveal which one is. My own list is shorter, and I set it out in Britpower last week: efficiency first, generation close to where it's used, and British engineering and finance pointed at both. Whichever way he leans, Wednesday's 13% price-cap rise has already written the first line of his in-tray.

Who pays for the AI grid. Washington’s ratepayer-protection push — FERC’s show-cause orders to grid operators, and House bills to make loads above 100 MW carry the full incremental cost of their upgrades — continues to move. The question of whether households subsidise hyperscalers is becoming the domestic politics of the AI build-out, on both sides of the Atlantic.

Wednesday 8 July brings the minutes of the Federal Reserve’s June meeting — the first under Kevin Warsh, and, given his scepticism of forecasts, the closest look markets will get at how seriously the committee weighed a hike before the payrolls miss. The same day, the Reserve Bank of New Zealand decides on rates, with markets pricing a hike on the back of conflict-driven fuel inflation — a small economy, but a clean read on how energy shocks are forcing central banks in the wrong direction for growth. Thursday 9 July brings Chinese inflation data, and with it a check on demand in the world’s largest crude importer, whose purchases slumped to a ten-year low during the war. In the US, the ISM services survey lands early in the week as the first post-payrolls read on the broader economy. Further out, keep two dates pencilled: the European Commission’s Electrification Action Plan and ETS review on 15 July, and the mid-month OPEC and IEA market reports — the first full accounting of how quickly Gulf supply is actually returning, and how large the second-half surplus could be. The eight core OPEC+ producers are also due their monthly review of output levels; at the time of writing the date had not been confirmed.

The instinct after four months of war is to read this week as the return to normal: the price round-tripped, the ships are moving, the strait is open-ish. But look at what didn’t go back. British households start the quarter paying 13% more, and will pay it for months regardless of where Brent trades. The US central bank is debating hikes into a slowing labour market because of an inflation impulse whose cause has notionally ended. PJM is writing data-centre curtailment into its emergency procedures, and $25 billion of institutional capital just committed to generation that never touches the queue. That is the pattern I argued in The Edge and keep returning to: supply shocks are temporary, but exposure is structural — and the exposure is what the system is finally, visibly, repricing. The remedies being reached for this week were not more tankers or more wires. They were flexible demand, on-site generation, and consumption that quietly fell far enough to move the regulator’s definition of “typical.” The war put a premium on the barrel for four months. It may have put a premium on the megawatt you don’t need for rather longer.

A Very British Problem — why efficiency-first is the answer to Britain’s heat, cold and bills alike; this week’s price cap makes the case for me.
The Forcing Function — how EDGE infrastructure shortens the fuse between a missile strike in the Gulf and a bill arriving in Grantham.
Last week’s Weekend Edition — the hyperscalers give up waiting for the grid.

If you’ve found this useful, do share it — the Weekend Edition is free to all.

— Jonathan Maxwell Founder & CEO, SDCL · author of The Edge

Jonathan Maxwell is the CEO of Sustainable Development Capital LLP and author of The Edge. He writes about energy, climate, finance, and geopolitics. Views expressed are personal and do not constitute investment advice. To learn more about energy efficiency, visit the website of SEIT plc, or SDCL Group.

Energy & AI / data centres

Oil & geopolitics

UK energy bills

Macro & the week ahead

THE EDGE BRIEFING — Weekend Edition — Sunday, 5 July 2026

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