National Grid puts $1.75 billion into Joulent to power AI data centers

One of the biggest AI-related deals of the summer is not about models at all. On July 1, 2026, National Grid Ventures — the commercial arm of UK utility giant National Grid — announced a $1.75 billion investment for a 35 percent stake in Joulent, a US company that builds power infrastructure for data centers and other electricity-hungry customers. The deal values Joulent at roughly $5 billion.

Selling electricity to the AI boom

Joulent's pitch is a workaround for the slowest part of the AI buildout: connecting to the grid. In many US regions, a new data center can wait years for a utility interconnection. Joulent develops integrated power solutions on the customer's side of that bottleneck — co-located gas generation, battery storage, and renewables that can be stood up alongside the facility that needs them, without waiting in the interconnection queue.

The anchor for the partnership is Project Kilby, a 50/50 venture between Joulent and Chevron: a 2.67-gigawatt power facility in West Texas that will feed a Microsoft-operated data center under a 20-year power purchase agreement. For scale, that is roughly the output of two large nuclear reactors, dedicated to a single customer's computing.

The picks-and-shovels phase of AI

The deal fits a clear mid-2026 pattern: enormous sums are flowing to the physical layer underneath AI. In the same week, Microsoft launched a $2.5 billion unit devoted to hands-on enterprise AI deployment, and weekly venture funding tallies were led by energy and infrastructure plays rather than model startups. Investors have concluded that whoever wins the model race, the power bill gets paid either way — the classic picks-and-shovels logic of every gold rush.

For a regulated utility group like National Grid, it is also a hedge. AI demand is reshaping electricity markets faster than traditional grid planning can respond, and owning a stake in the fast, flexible end of the business is a way to participate rather than just cope.

Why it matters for small business

You are not building a data center, but this deal touches you in two ways. First, electricity prices: gigawatt-scale AI demand is putting real pressure on regional power markets, and in some areas commercial rates are already reflecting it. If energy is a meaningful line item for you, it is worth watching how data center growth in your region affects rates — and locking in fixed-price contracts where they are favorable. Second, reliability of the AI tools you rent: the industry pouring billions into dedicated power is ultimately good news for anyone who depends on cloud AI services, because compute scarcity — the thing that causes rate limits, waitlists, and price spikes — is being attacked at its root. The AI boom is becoming an energy business, and energy businesses build for decades.