# Mainspring Energy

> Mainspring Energy manufactures software-controlled linear generators that provide local, dispatchable electricity for utilities, data centers, and commercial and industrial sites. Its systems can switch among gaseous fuels, work alongside renewables, and operate independently of the grid.

- **Founded:** 2010
- **Headquarters:** Menlo Park, United States
- **Founders:** Shannon Miller (President and co-founder; founding CEO until June 2026), Adam Simpson (Chief Commercial Officer and co-founder), Matt Svrcek (Co-founder; historically Chief Technology Officer)
- **Products:** Mainspring Linear Generator, Standardized 2.5 MW configuration, Project delivery and service
- **Notable:** Customer generator deployments began in 2020, followed by a public commercial launch in March 2021., More than US$800 million in financing reported at the April 2025 Series F announcement., Current company website reports more than 1.5 million core run hours.

## Products & services

- **Mainspring Linear Generator** — Modular local generation using a low-temperature reaction to drive magnets through coils; software enables load following and switching among compatible gaseous fuels. Customer deployments began in 2020; public launch followed in 2021.
- **Standardized 2.5 MW configuration** — Ten 250-kW generators with integrated skid-mounted inverters and an isolation transformer; current specifications list 46% net AC electrical efficiency under stated test conditions.
- **Project delivery and service** — Site assessment, financing options, permitting, installation, and maintenance through Mainspring and partners.

## Achievements

- Customer generator deployments began in 2020, followed by a public commercial launch in March 2021.
- More than US$800 million in financing reported at the April 2025 Series F announcement.
- Current company website reports more than 1.5 million core run hours.
- CalBio expanded its relationship through repeat equipment purchases.
- Shannon Miller received the 2022 DOE C3E Entrepreneurship Award and 2023 Energy Central innovation recognition.

## Latest updates

- **2026-09** — CEO Tom Linebarger published a perspective on selecting the right power infrastructure, dated September 24.
- **2026-08** — Company published a dispatchability explainer on August 27 and linked a Texas-grid podcast on August 5.
- **2026-06** — Tom Linebarger became CEO and Shannon Miller became president on June 10.
- **2026-03** — Company announced the Air Force multi-fuel pilot contract at Travis Air Force Base on March 4.
- **2026-02** — CalBio announced eight additional generator purchases and a 5.3-MW, five-site target for the end of 2026 on February 23.

## Links

- Website: https://www.mainspringenergy.com/
- LinkedIn: https://www.linkedin.com/company/mainspringenergy
- YouTube: https://www.youtube.com/@MainspringEnergy

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Profile page: https://yespress.io/mainspring-energy
Published by YesPress — https://yespress.io
Last updated: 2026-10-06