Voxel builds the data center and its power together, on site, so a build takes months rather than the five years an average grid connection now takes. Solar generation, second-life EV batteries and a DC power distribution system stand in for the utility connection. Casey was project manager on Tesla's Infotainment and Autopilot team, responsible for the development of Hardware 3. During Model 3 production hell he built assembly cells in Fremont and worked them himself. He has founded three hardware companies since. Voxel Energy (YC W26) won YC's Product Showcase in January 2026. Its prototype system is already running off-grid compute, it has land under contract, and it is taking reservations for its first sites.
Casey Spencer is the co-founder and CEO of Voxel Energy, which builds off-grid data centers. He was project manager for Tesla's Autopilot and Infotainment team, led ad-hoc Model 3 assembly lines during Tesla's 2018 production hell, and has founded three hardware companies.
A Y Combinator W26 company that builds data centers and their power together, bypassing the utility connection entirely with on-site solar generation, storage and distribution.
Because the wait is the problem. Average time to power for a data center is five years and growing, and the company's read is that the AI bottleneck is power, not chips.
Solar at scale for generation, second-life EV batteries for 24/7 storage, backup generation for redundancy, and a proprietary DC power distribution system that avoids repeated conversion losses and adds inherent redundancy.
The prototype system is live and running off-grid compute, thousands of acres are under contract, and the company is taking reservations for its existing sites.
Voxel won Y Combinator's Product Showcase in January 2026.
