Prediction Open AI assessment confidence: 85% certainty 4/5 debate potential 3/5

Exowatt targets 1 cent per kWh via mass-produced modular solar thermal units

Hannan Happi · Inside the Factory Using Rocks & Sunlight to Fix AI's Power Problem | Exowatt · Sourcery with Molly O'Shea · Apr 15, 2026 · at 3:37

Hannan Happi, CEO of Exowatt, discusses the startup's approach to providing continuous solar energy for AI data centers.

0:00 / 0:15exact quote · 15.4s
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“What's new really about our approach and our hypothesis is making this in a modular fashion, making this in a factory. And then scaling the production to millions and ultimately billions of these, which ultimately allows us to go down the cost curve and generate electricity at our ultimate goal of one cent per kilowatt hour.”

quote is from the automated transcript, cleaned for reading: filler sounds and stutters are removed, nothing is rephrased. names can be misheard (the analysis reads context, assessments check outside sources). how →

More from Hannan Happi

Prediction Not checkable as stated
Happi: Hyperscalers relying on gas burners will face major emission penalties
“Otherwise we're going to be left with tens or even, yeah, tens of gigawatts of Mac gas burners that are going to last for another 20 years, and they might be a quick fix now, but I think the hyperscalers know they're going to pay a price for this later, both i…”
Hannan Happi Apr 15, 2026 ▶ 32:33 Inside the Factory Using Rocks & Sunlight to Fix AI's Power Problem | Exowatt · Sourcery with Molly O'Shea
Opinion
Happi: Many publicly announced data center projects are phantoms that won't happen
“There's a lot of headlines about data center projects being planned or initiated. I don't think all of them are actually happening, so there's a lot of, like, phantom data centers that are being Announced.”
Hannan Happi Apr 15, 2026 ▶ 34:36 Inside the Factory Using Rocks & Sunlight to Fix AI's Power Problem | Exowatt · Sourcery with Molly O'Shea
Prediction Open · timeframe Dec 2030
Happi: Hyperscaler data center buildouts will keep scaling through 2030
“So I would say until 2030, there's no doubt that this is going to continue to scale at this rate. The question is like, what happens after 2030, and is it going to continue beyond that?”
Hannan Happi Apr 15, 2026 ▶ 35:48 Inside the Factory Using Rocks & Sunlight to Fix AI's Power Problem | Exowatt · Sourcery with Molly O'Shea
Assertion Contradicted
Data centers sign power contracts between 20 and 30 cents per kWh
“And if you think about data centers, they're signing contracts as, you know, on the mid range, 20 cents a kilowatt hour, up to 30 cents a kilowatt hour.”
Hannan Happi Apr 15, 2026 ▶ 6:31 Inside the Factory Using Rocks & Sunlight to Fix AI's Power Problem | Exowatt · Sourcery with Molly O'Shea
Insight
Building a data center requires roughly $50 billion in CapEx per gigawatt
“You could kind of say, rule of thumb, one gigawatt data center, or per gigawatt, you have to spend about fifty billion dollars of capex.”
Hannan Happi Apr 15, 2026 ▶ 35:59 Inside the Factory Using Rocks & Sunlight to Fix AI's Power Problem | Exowatt · Sourcery with Molly O'Shea
Assertion Not checkable as stated
Happi: Exowatt operates the world's largest indoor solar simulator
“This is the largest solar simulator of its kind in the world, so it's state-of-the-art, and what that means is we essentially have the sun indoors, so that allows us to do 24 seven testing.”
Hannan Happi Apr 15, 2026 ▶ 11:57 Inside the Factory Using Rocks & Sunlight to Fix AI's Power Problem | Exowatt · Sourcery with Molly O'Shea
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