Rune has introduced RELIC, a modular compute system that operates directly at solar generation sites to convert previously wasted electricity into high-performance computing capacity. The company announced a $40 million Series A led by Spark Capital, with participation from Union Square Ventures, Lowercarbon Capital, Activate Capital, Committed Capital, Timeless Partners, and Logos Fund. The investment brings total funding to $53.5 million and supports an approach designed to bypass the grid bottlenecks that have slowed AI infrastructure expansion.
Tapping Stranded Solar Energy
Solar plants can waste up to 20 percent of the energy they generate because power is produced but never sold or delivered to the grid. In the United States alone, this represents an estimated 50-plus terawatt hours per year of lost clean electricity. RELIC captures that stranded energy at the source, avoiding meter fees, grid charges, and the long interconnection queues that now constrain AI buildouts across the country.
A Faster and Cheaper Compute Model
The system can be installed in 60 minutes and energized for compute customers in as little as six weeks from contract signature, a sharp contrast to the years required for traditional data center construction. Rune says RELIC cuts non-compute infrastructure costs by 85 percent, which equals about $620 million in savings on a 100-megawatt deployment. The design also eliminates the need for heavy site preparation, leaves no visible footprint, and uses no water, making it less disruptive to host communities.
Off-Grid Technical Design
RELIC runs natively on direct current, which is the natural output of solar panels, eliminating alternating current conversion loss and the associated hardware. It requires no grid connection, no transformers, no utility approvals, and no waiting for external infrastructure. This off-grid posture means the system can operate without the traditional utility processes that often delay large-scale data center projects.
Texas Field Validation
The company also revealed a live installation at a 200-megawatt solar facility in Texas, deployed with no site modifications, grid work, or construction on an existing renewable asset. The Texas project demonstrates that RELIC can operate behind the meter without disrupting core plant operations. Rune describes the deployment as evidence that existing solar plants can become latent data centers with minimal intervention.
Leadership and Investor Support
Rune co-founder and CEO William Layden previously ran a division of Cube Hydro that harnessed unused hydroelectric power for clean computing. Co-founder and CTO Varun Palivela is a chip architect whose work at NUVIA contributed to Qualcomm's acquisition and Snapdragon X Elite platform. Spark Capital founder Santo Politi said Rune deploys compute behind the meter at operating solar farms, turning renewable assets into potential deployment sites.
Expanding Partnerships
RELIC is live across initial clean energy partner sites, and Rune is actively expanding its pipeline of power partnerships and compute customers. Compute customers can reserve inference capacity through the company's platform, while power partners can explore site opportunities at rune.energy. The company's model reduces non-compute infrastructure costs compared with traditional AI data centers and delivers capacity without grid dependency, a key advantage as energy demand grows.
By coupling compute directly to clean generation, Rune addresses a central mismatch in AI infrastructure: abundant renewable energy is often unused while data center demand outpaces grid capacity. The $40 million Series A and the Texas deployment signal growing confidence in modular, off-grid approaches to high-performance computing. If the model scales, it could offer a faster and more sustainable path for AI capacity across existing solar assets.