Mainspring Energy Signs Landmark 1.6 GW Agreement with AEP for Reliable, Affordable Power Capacity

Agreement accelerates adoption of Mainspring’s Linear Generators at grid scale in the rapidly growing market for onsite power generation

MENLO PARK, Calif. — Oct. 13, 2026 — Mainspring Energy, Inc. has signed a landmark sales agreement with American Electric Power (AEP), one of North America’s largest electric utilities, to provide up to 1.6 gigawatts (GW) of Mainspring Linear Generators through 2034. As part of the agreement, AEP purchased its first tranche of the Mainspring products, at 190 megawatts (MW), for delivery beginning in 2027.

The agreement represents the largest procurement of linear generators to date, a key milestone for Mainspring as it extends operations beyond the commercial, industrial and data center markets into the investor-owned electric utility sector at gigawatt scale. 

Mainspring’s linear generators deliver a unique combination of high reliability, dispatchability, efficiency, and low emissions. The products provide utilities with a rapidly deployable asset that helps maintain grid capacity, stability, and affordability for customers while supporting increased power demands from AI data centers, manufacturing, and electrification.

"Mainspring linear generators can provide additional capacity quickly and efficiently, allowing us to better support growing energy needs." — Bill Fehrman, AEP chairman, president and CEO.

"We continue to pursue new, innovative solutions to help meet the rapid growth in energy demand, support economic growth and deliver long-term value for our customers," said Bill Fehrman, AEP chairman, president and chief executive officer. "Mainspring's linear generators can provide additional capacity quickly and efficiently, allowing us to better support growing energy needs." 

“American Electric Power is demonstrating strategic leadership in navigating speed-to-power requirements,” said Tom Linebarger, CEO of Mainspring Energy. “This agreement highlights the high value that linear generators bring to AEP and its customers—delivering affordable, reliable, and dispatchable power that works.”
 

About Mainspring Energy
Mainspring Energy manufactures and delivers fuel-flexible, low-emissions local power solutions that rapidly add new capacity and deliver reliable, affordable, and sustainable electric power. The company began commercial shipments of its Mainspring Linear Generators in 2020 and today has more than a gigawatt in advanced development and field operations for leading Fortune 500 companies, data centers, and utilities.