Everything you need to know about Joule
MBES is our patented technology that stores energy using the natural physics of ocean pressure and buoyancy. Units sink to store energy and rise to generate power — a simple, elegant solution for large-scale renewable storage.
Our target round-trip efficiency is competitive with pumped hydro storage (70-85%), with the advantage of virtually unlimited deployment locations and no requirement for specific geography.
MBES has minimal environmental impact. It requires no land use, no freshwater consumption, and uses no hazardous materials. The system operates in the water column with negligible effect on marine ecosystems.
MBES is designed for long-duration storage — hours to days — making it ideal for balancing intermittent renewable generation and providing grid stability during extended periods of low wind or solar output.
Joule is currently raising capital through SEC-compliant SAFE Notes. Qualified investors can express interest through our investment page and our team will reach out to discuss opportunities.
Joule is incorporated as a Delaware C Corporation. Our cap table is managed through Carta, ensuring professional-grade equity management and compliance.
Joule is an early-stage startup with patented technology. We're currently focused on pilot development and strategic partnerships while building out our team and raising capital.
We're seeking partners with offshore or coastal infrastructure — offshore wind operators, port authorities, coastal industrial facilities, and research institutions who want to help validate and deploy ocean-based energy storage.
Ideal pilot sites have access to sufficient ocean depth, grid connection capability, and an interest in energy storage. Contact us through our host page to discuss your specific situation.
Joule is headquartered in Los Angeles, California — positioned to leverage the state's leadership in clean energy and access to the Pacific Ocean for testing and deployment.
Yes! We're always looking for exceptional people who want to help build the future of energy storage. Visit our careers page to learn more and get in touch.
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