Otoro Energy
Volta MemberVFBoulder, CO, United States
About
Otoro Energy develops a flow battery for long-duration grid storage, based on a metal chelate chemistry that combines iron-chrome and organic approaches.
The company says the battery is non-flammable, non-corrosive and non-toxic, operates at neutral pH, and uses abundant materials that can be sourced in the United States.
It targets ten-hour storage for utilities that power critical infrastructure and reports a partnership with a Tier-1 US utility. Otoro is based in Boulder, Colorado, and is led by founder and CEO Michael Marshak. Its funding includes a $4.14 million US Department of Energy award with RTRC and CU Boulder to develop its metal chelate flow battery system.
From the Battery Report
Battery Report 2025 · chapterApplications: Stationary Energy StorageVolta Foundation's annual report on this part of the battery industry.Supply Chain Segments
Location Info
- HQ
- Boulder, CO, United States
Quick Facts
- Founded
- 2020
- Team Size
- 1-10
- Funding
- Private
- Last Updated
- Oct 14, 2026
