The picks-and-shovels way to own the AI buildout

Most of the money pouring into artificial intelligence goes into chips and software. The physical buildout, the power, the cooling, the enclosures that keep the machines running, is a quieter and often cheaper way to own the same trend. AI data center stocks are that picks-and-shovels layer. They do not have to pick the winning model or the winning cloud. They simply sell the gear and the electricity that every data center has to buy.

The Angel Publishing presentation behind the Homestacks idea makes this argument in a specific way. It starts from a real observation: the giant centralized data centers that run today’s AI are running into limits on power, water, and heat. From there it proposes that AI compute moves out to a distributed appliance installed on new homes. The three stocks it names sit at different points in that story, and each one is a real, liquid, exchange-traded company with a genuine data-center angle.

The three layers of the buildout

AI data center stocks break into layers. The power layer owns and sells electricity. The enclosure layer makes the housings and cabinets that protect servers and electrical gear. The resiliency layer keeps the whole thing running when the grid stumbles. The Homestacks pitch names one company from each layer, which is a more balanced setup than the single-stock teases most promos run.

nVent Electric (NVT) is the enclosure and housing name. It trades near $152 with a market value around $24.6 billion, and data centers now make up roughly 40% of its revenue. The stock is up about 100% over the past year and changes hands at roughly 25 times forward earnings. Generac Holdings (GNRC) is the resiliency name, best known for home backup generators, and it now carries a data-center backup-power backlog of about $700 million. It trades near $206 with a market value around $12.2 billion and roughly 20 times forward earnings. Vistra Corp. (VST) is the power name, a Texas-centric generator trading near $136 with a market value around $45.7 billion and about 13 times forward earnings.

What the multiples tell you

The three names trade at very different prices, and that spread is a feature, not a bug. Vistra is the cheapest at about 13 times forward earnings, which reflects that power is a capital-heavy business with 15% to 20% earnings growth expected. nVent is the most expensive at roughly 25 times forward earnings, a premium the market pays for its enclosure franchise and its heavy data-center revenue mix. Generac sits in the middle near 20 times, with growth expected to slow to about 20% a year in 2027 and 2028 and the stock down roughly 45% from its high.

None of these is a stretched, story-driven valuation, and that is the honest appeal of the promo. These are established businesses with real cash flow, and the AI angle is a growth driver layered on top rather than the entire thesis.

Where the Homestacks idea fits

The promotion describes a device it calls a Homestack, an outdoor appliance about the size of an air-conditioning compressor. The real product behind that description is SPAN’s XFRA unit, which pairs NVIDIA Blackwell GPUs, roughly $150,000 or more of equipment per unit, with a smart electrical panel and a home battery. SPAN covers the host homeowner’s power and internet and installs the battery and panel at no cost. The first pilot is about 100 units in build-to-rent communities in Arizona and Nevada with the homebuilder PulteGroup.

SPAN has raised roughly $500 million and took a $75 million strategic investment from Eaton. One detail is worth keeping straight. NVIDIA agreed to sell SPAN the Blackwell GPUs. It did not invest in SPAN and did not discount the chips. SPAN’s own press release says the XFRA is meant to augment, not replace, centralized data centers. That is a meaningful hedge against the promo’s bolder headline. Our walkthrough of AI data center stocks covers the conventional buildout these companies actually depend on.

Reading the three picks honestly

All three stocks are real data-center-adjacent businesses trading at sane multiples, and that is the fair part of the pitch. But the 100-unit Homestacks pilot has very little to do with their fundamentals. nVent’s data-center revenue, Generac’s backup-power backlog, and Vistra’s power contracts all grow because the conventional buildout grows, not because a few hundred homes get a GPU appliance. The AI infrastructure story runs on the same underlying demand.

That is the honest way to read this promo. Buy nVent, Generac, and Vistra for the data-center buildout thesis if you believe in it, and treat the pilot as an interesting side story. Vistra is the hedge of the three, because it wins whether the buildout accelerates or stalls. Our breakdown of the data-center energy stocks explains why the power layer is the most defensive way to play it.

Ready to see the research? Click here to access the Angel Publishing report.

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