Fresnel lenses and heat battery explained

Most announced data centers will never get built. The ones that do are running on gas generators. And the US grid has no answer for what's coming.

Hannan Happi, CEO & Co-Founder of Exowatt, joins Sourcery for a rare facility tour of their 40,000 sq ft Miami HQ — walking us through the tech, the team, and why the AI power crisis is far worse than the headlines suggest.

Exowatt has raised $140M from a16z, Felicis, Sam Altman, Leonardo DiCaprio, Starwood Capital, Thrive Capital, and more, all betting on a deceptively simple idea: concentrate sunlight with Fresnel lenses, store the heat in rocks at 1,000°C, and dispatch electricity on demand. 24 hours a day, no grid required.

Their P3 system is built from sand, dirt, and steel. Like a large magnified glass and a rock. No lithium. No cobalt. No China. Target cost: 1 cent per kilowatt hour.

Timestamps

(00:00) What is Exowatt? The solar backbone for AI data centers

(01:30) Why the US grid simply cannot handle what's coming

(02:00) Tour begins: Welcome to Lighthouse Miami — 40,000 sq ft facility

(02:45) The P3 explained: three elements, one shipping container

(04:00) The founding story: Atomic venture studio and the modular hypothesis

(05:30) Why solar thermal hasn't followed solar PV's 99.6% cost decline — until now

(07:00) North star: 1 cent per kilowatt hour and where they are today

(11:00) Inside the world's largest solar simulator — the sun, indoors

(13:00) The Fresnel lens up close: a giant magnifying glass for the sun

(15:00) "It's rock science" — the 5-year-old explanation of how it works

(17:30) Domestic raw materials (sand, dirt, steel) as the real competitive moat

(24:30) The phantom data center problem: most announcements won't get built

(26:00) From 100 MW to 10 GW: how data center scale exploded in 3 years

(30:00) Funding breakdown: $140M, a16z, Felicis, Sam Altman, Leonardo DiCaprio

(37:00) Lessons from Tesla: remove parts, iterate fast, build better

𝐒𝐏𝐎𝐍𝐒𝐎𝐑𝐒

• Brex—The modern finance platform, combining the world’s smartest corporate card with integrated expense management, banking, bill pay, & travel. https://brex.com/sourcery

• Turing—Turing delivers top-tier talent, data, and tools to help AI labs improve model performance—and enables enterprises to turn those models into powerful, production-ready systems. https://turing.com/sourcery• VCX—VCX is the public ticker for private tech, allowing investors of all sizes to invest in venture capital. View The Portfolio at http://GetVCX.com

• Deel—Deel is the global people platform that helps startups hire, manage, pay, and equip anyone, anywhere. Trusted by more than 35,000 fast-growing companies, Deel is the people platform that just works, so teams can scale without the chaos. Visit: https://www.deel.com/sourcery

• Public–Investing platform Public just launched Generated Assets, which lets you turn any idea into an investable index with AI. With Generated Assets, you can build, backtest, refine, and invest in any thesis with AI. Gone are the days of one-size-fits-all ETFs. https://public.com/sourcery

• Merge—The leading provider of customer-facing integrations and agentic tools for frontier LLMs, Fortune 500 organizations, and B2B SaaS companies. Visit: https://merge.dev

Follow Sourcery for the latest updates!

https://www.sourcery.vc/

Disclosure

Paid Endorsement. Brokerage services by Open to the Public Investing Inc, member FINRA & SIPC. Advisory services by Public Advisors LLC, SEC-registered adviser. Crypto trading provided by Zero Hash LLC, licensed by the NYSDFS. Generated Assets is an interactive analysis tool by Public Advisors. Output is for informational purposes only and is not an investment recommendation or advice. See disclosures at public.com/disclosures/ga. Matched funds must remain in your account for at least 5 years. Match rate and other terms are subject to change at any time.