Paul Afonso
Utility Industry Leader; Partner, Womble Bond Dickinson
Utilities
Meet capacity demands.
Deliver firm, flexible capacity to your growing customers and communities.
Modular, near to load, fast ramping, low emissions power.
01
Add firm capacity
Bring flexible, dispatchable capacity with no duration limit or startup emissions penalty, with a solution consistently selected in production cost and capacity expansion models.
02
Deploy faster
Factory-built, modular units with near-zero NOx emissions streamline air permitting, reduce community opposition, and get capacity in service faster when and where it's needed.
03
Deliver fast response
Integrate near-instant response seamlessly with renewables while balancing variable load, minimizing curtailment, and eliminating the need for BESS.
04
Guarantee high availability
Deliver right-sized capacity with less overbuild and exceptional reliability with our modular design.
05
Reduce risk
Leverage abundant, low-cost gas while retaining fuel surety with propane backup and readiness for future hydrogen requirements.
Mainspring’s linear generators can provide additional capacity quickly and efficiently, allowing us to better support growing energy needs.
Bill Fehrman
Chairman and CEO, AEP
48 MW of firm capacity to address a looming capacity gap.
Utah Municipal Power Agency (UMPA)
Rapid deployment
Deliver and commission 48 MW of firm capacity in time to meet UMPA’s capacity deadline.
Control cost
ITC-eligible Linear Generators can be located close to demand, reducing transmission needs and improving efficiency to help lower costs for ratepayers.
Mainspring’s local power solution gives UMPA the dispatchable power we need to control our energy future while staying aligned with our sustainability and cost objectives.
Travis Ball
Vice President of Generation, Utah Municipal Power Agency (UMPA)
40% lower electricity rates delivered to community.
Lathrop Irrigation District (LID)
Solar Firming
LID is now able to meet 95% of its peak load with local, dispatchable power that cuts electricity costs.
Rapid deployment
Achieved air permits in three months; generator delivery in seven months.
Mainspring simplifies every
step to get local power.
01
Site Plan
We assess your site and energy goals to design your optimal system.
02
Financing
Select flexible ownership and service options to align with your budget.
03
Permitting
Streamlined approvals with low noise and emission design.
04
Installation
Factory-built, pre-assembled, and tested units that deploy fast.
05
Maintenance
Get turnkey maintenance from Mainspring or explore our flexible service offerings.
Experts shaping tomorrow’s energy systems.
Add dispatchable power where and when it’s needed.
Learn how energy is changing.
In The News
15 October 2026
Utility Dive
In The News
13 October 2026
Bloomberg
Perspectives
24 September 2026
Tom Linebarger, Chairman and CEO, Mainspring
Mainspring’s linear generators deliver fast-ramping, dispatchable capacity that qualifies as firm power under utility planning models. Systems can start, ramp, and reach full output quickly, providing clean, firm generation for peak, intermediate, or continuous operation. This flexibility allows utilities to meet capacity obligations, maintain reliability, and support renewable integration without duration limits.
The linear generator instantly adjusts output to match fluctuations in renewable generation. When solar or wind output drops, it ramps up to maintain grid balance; when renewables surge, it ramps down with no efficiency penalty. This responsiveness helps utilities reduce curtailment, optimize renewable portfolios, and avoid costly overbuilds of battery or transmission capacity.
Their low-temperature, non-combustion process produces near-zero NOx, no particulate matter, and low noise, allowing projects to move forward under existing air-district limits. These characteristics streamline environmental review and enable rapid deployment of clean capacity in regions where turbines and engines face strict permitting barriers.
Fuel flexibility allows utilities to operate on natural gas today and transition to renewable fuels, including hydrogen, as availability increases without replacing equipment. This protects long-term capital investments and ensures continued compliance as decarbonization policies, fuel markets, and emissions standards evolve.
Factory-built, modular units can be installed at substations or near load centers to provide firming and resilience where it is needed most. This distributed approach strengthens grid reliability, defers major transmission and distribution upgrades, and allows utilities to add clean capacity quickly and cost-effectively.