Any fuel, any scale, anytime, anywhere
The Mainspring Linear Generator delivers high-efficiency power with unmatched flexibility, including the ability to switch dynamically between fuels including natural gas, propane, hydrogen, ammonia, and biogas, and to quickly track any load with its full dispatchability. Whether deployed as a single unit or as a grid-scale array, the technology is easy to permit and interconnect in any jurisdiction, allowing for broad impact across a wide range of use cases on both sides of the meter.
“We haven’t had a single month when they’ve missed a single spec. They’ve delivered on every technical dimension we care about.”
"This clean-fleet charging site is the first and largest of its kind in the world. Hydrogen-ready today, it offers a new model for substantially reducing emissions. It establishes a new, rapid, and resilient way forward and a model for clean charging of electric vehicles anywhere.”
“Mainspring’s flexible platform has potential use in a variety of applications from customer resiliency projects to grid-scale power plants.”
"The linear generator is an important component of our sustainable wastewater management practices. The addition of the Mainspring product to our plant will help us meet our clean energy goals, reduce greenhouse gas emissions, and create operational efficiencies.”
“Mainspring’s linear generator technology has allowed our business to manage electricity expenses better and lower its carbon footprint. We have already begun adopting this technology at other locations to expand this program.”
“This is a low-emissions, resilient, and affordable alternative that holds a lot of promise for our future.”
"Mainspring's technology helps to support our move to net zero carbon energy. Mainspring generators improve energy independence and buffer our growing use of solar power, while offering the potential future use of zero carbon fuels like green hydrogen and others."
"Mainspring's radical flexibility in clean power generation — the ability to operate multiple fuel types, to turn on and off rapidly, to be placed anywhere, easily and affordably — has the potential to demonstrably speed the world's move to zero-carbon electricity."
"Many commercial and industrial customers as well as utilities want clean, reliable power generation, with the capability to switch to 100% renewable fuels like biogas and hydrogen as they become available. Mainspring is able to integrate clean onsite generation with both renewables and the grid and we're pleased to support bringing this innovative product to market."
"One of the greatest challenges in the global race towards decarbonization is getting there at sustainable levels of resilience and cost. Mainspring's approach brings together these benefits in a way that no other technology we've seen can accomplish."
“We haven’t had a single month when they’ve missed a single spec. They’ve delivered on every technical dimension we care about.”
"This clean-fleet charging site is the first and largest of its kind in the world. Hydrogen-ready today, it offers a new model for substantially reducing emissions. It establishes a new, rapid, and resilient way forward and a model for clean charging of electric vehicles anywhere.”
“Mainspring’s flexible platform has potential use in a variety of applications from customer resiliency projects to grid-scale power plants.”
"The linear generator is an important component of our sustainable wastewater management practices. The addition of the Mainspring product to our plant will help us meet our clean energy goals, reduce greenhouse gas emissions, and create operational efficiencies.”
“Mainspring’s linear generator technology has allowed our business to manage electricity expenses better and lower its carbon footprint. We have already begun adopting this technology at other locations to expand this program.”
“This is a low-emissions, resilient, and affordable alternative that holds a lot of promise for our future.”
"Mainspring's technology helps to support our move to net zero carbon energy. Mainspring generators improve energy independence and buffer our growing use of solar power, while offering the potential future use of zero carbon fuels like green hydrogen and others."
"Mainspring's radical flexibility in clean power generation — the ability to operate multiple fuel types, to turn on and off rapidly, to be placed anywhere, easily and affordably — has the potential to demonstrably speed the world's move to zero-carbon electricity."
"Many commercial and industrial customers as well as utilities want clean, reliable power generation, with the capability to switch to 100% renewable fuels like biogas and hydrogen as they become available. Mainspring is able to integrate clean onsite generation with both renewables and the grid and we're pleased to support bringing this innovative product to market."
"One of the greatest challenges in the global race towards decarbonization is getting there at sustainable levels of resilience and cost. Mainspring's approach brings together these benefits in a way that no other technology we've seen can accomplish."
“We haven’t had a single month when they’ve missed a single spec. They’ve delivered on every technical dimension we care about.”
"This clean-fleet charging site is the first and largest of its kind in the world. Hydrogen-ready today, it offers a new model for substantially reducing emissions. It establishes a new, rapid, and resilient way forward and a model for clean charging of electric vehicles anywhere.”
“Mainspring’s flexible platform has potential use in a variety of applications from customer resiliency projects to grid-scale power plants.”
"The linear generator is an important component of our sustainable wastewater management practices. The addition of the Mainspring product to our plant will help us meet our clean energy goals, reduce greenhouse gas emissions, and create operational efficiencies.”
“Mainspring’s linear generator technology has allowed our business to manage electricity expenses better and lower its carbon footprint. We have already begun adopting this technology at other locations to expand this program.”
“This is a low-emissions, resilient, and affordable alternative that holds a lot of promise for our future.”
"Mainspring's technology helps to support our move to net zero carbon energy. Mainspring generators improve energy independence and buffer our growing use of solar power, while offering the potential future use of zero carbon fuels like green hydrogen and others."
"Mainspring's radical flexibility in clean power generation — the ability to operate multiple fuel types, to turn on and off rapidly, to be placed anywhere, easily and affordably — has the potential to demonstrably speed the world's move to zero-carbon electricity."
"Many commercial and industrial customers as well as utilities want clean, reliable power generation, with the capability to switch to 100% renewable fuels like biogas and hydrogen as they become available. Mainspring is able to integrate clean onsite generation with both renewables and the grid and we're pleased to support bringing this innovative product to market."
"One of the greatest challenges in the global race towards decarbonization is getting there at sustainable levels of resilience and cost. Mainspring's approach brings together these benefits in a way that no other technology we've seen can accomplish."
“We haven’t had a single month when they’ve missed a single spec. They’ve delivered on every technical dimension we care about.”
"This clean-fleet charging site is the first and largest of its kind in the world. Hydrogen-ready today, it offers a new model for substantially reducing emissions. It establishes a new, rapid, and resilient way forward and a model for clean charging of electric vehicles anywhere.”
“Mainspring’s flexible platform has potential use in a variety of applications from customer resiliency projects to grid-scale power plants.”
"The linear generator is an important component of our sustainable wastewater management practices. The addition of the Mainspring product to our plant will help us meet our clean energy goals, reduce greenhouse gas emissions, and create operational efficiencies.”
“Mainspring’s linear generator technology has allowed our business to manage electricity expenses better and lower its carbon footprint. We have already begun adopting this technology at other locations to expand this program.”
“This is a low-emissions, resilient, and affordable alternative that holds a lot of promise for our future.”
"Mainspring's technology helps to support our move to net zero carbon energy. Mainspring generators improve energy independence and buffer our growing use of solar power, while offering the potential future use of zero carbon fuels like green hydrogen and others."
"Mainspring's radical flexibility in clean power generation — the ability to operate multiple fuel types, to turn on and off rapidly, to be placed anywhere, easily and affordably — has the potential to demonstrably speed the world's move to zero-carbon electricity."
"Many commercial and industrial customers as well as utilities want clean, reliable power generation, with the capability to switch to 100% renewable fuels like biogas and hydrogen as they become available. Mainspring is able to integrate clean onsite generation with both renewables and the grid and we're pleased to support bringing this innovative product to market."
"One of the greatest challenges in the global race towards decarbonization is getting there at sustainable levels of resilience and cost. Mainspring's approach brings together these benefits in a way that no other technology we've seen can accomplish."
“We haven’t had a single month when they’ve missed a single spec. They’ve delivered on every technical dimension we care about.”
"This clean-fleet charging site is the first and largest of its kind in the world. Hydrogen-ready today, it offers a new model for substantially reducing emissions. It establishes a new, rapid, and resilient way forward and a model for clean charging of electric vehicles anywhere.”
“Mainspring’s flexible platform has potential use in a variety of applications from customer resiliency projects to grid-scale power plants.”
"The linear generator is an important component of our sustainable wastewater management practices. The addition of the Mainspring product to our plant will help us meet our clean energy goals, reduce greenhouse gas emissions, and create operational efficiencies.”
“Mainspring’s linear generator technology has allowed our business to manage electricity expenses better and lower its carbon footprint. We have already begun adopting this technology at other locations to expand this program.”
“This is a low-emissions, resilient, and affordable alternative that holds a lot of promise for our future.”
"Mainspring's technology helps to support our move to net zero carbon energy. Mainspring generators improve energy independence and buffer our growing use of solar power, while offering the potential future use of zero carbon fuels like green hydrogen and others."
"Mainspring's radical flexibility in clean power generation — the ability to operate multiple fuel types, to turn on and off rapidly, to be placed anywhere, easily and affordably — has the potential to demonstrably speed the world's move to zero-carbon electricity."
"Many commercial and industrial customers as well as utilities want clean, reliable power generation, with the capability to switch to 100% renewable fuels like biogas and hydrogen as they become available. Mainspring is able to integrate clean onsite generation with both renewables and the grid and we're pleased to support bringing this innovative product to market."
"One of the greatest challenges in the global race towards decarbonization is getting there at sustainable levels of resilience and cost. Mainspring's approach brings together these benefits in a way that no other technology we've seen can accomplish."
Markets & Applications
The unmatched combination of low cost and high efficiency combined with fuel flexibility and full dispatchability make the Mainspring Linear Generator the ideal choice for customers.
Mainspring products and inverters are UL listed, streamlining the permitting and interconnection processes while firming intermittent renewables.
Powering Energy Project Success
Our case studies highlight innovative commercial deployments and demonstrate how customers are achieving fast deployment of new capacity, cost savings, reduced emissions, increased resilience, and other key benefits.
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![Lineage Logistics]()
Case Study: Lineage Logistics
Local, fuel-flexible power generation paired with rooftop solar at cold storage facility
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![Prologis Case Study - Mainspring Energy]()
Case Study: Prologis
EV charging infrastructure and prime power generation for a global leader in logistics real estate
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![Dairy Biodigester Developer]()
Case Study: Dairy Biodigester Developer
Clean onsite power generation deployment with a leading dairy biodigester developer
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![Napa Sanitation District]()
Case Study: Napa Sanitation District
Clean onsite power generation running on wastewater treatment system biogas
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Case Study: Kroger Stores
Clean, low-cost onsite power for the nation’s largest traditional grocery company
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Case Study: Municipal Utility
Clean, scalable, low-cost power for a muni serving a visionary, growing development
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Purchase Options
We currently offer customers two purchase options to realize the benefits of Mainspring’s Linear Generators — direct capital purchase or a financed solution such as an Energy Services Agreement / Power Purchase Agreement. Both options come with a Mainspring-supported Maintenance Agreement.
Direct Purchase
Customers looking to maximize cost savings and return on investment can directly purchase and own a Linear Generator. Mainspring works with customers to facilitate the installation, providing installation support or delivering full turn-key projects.
Energy Services Agreement
Mainspring has partnered with NextEra Energy Resources to provide customers a financed option for turn-key linear generator projects. With this option, customers can realize immediate benefits of Mainspring systems with no upfront costs.
Product Specifications
Utility-scale performance for any project size
Easy, modular installation
High availability, low maintenance
Up to 25 MW / acre scalability
Each base package contains two linear generator cores, operating in tandem
Outputs
400/480 V, 3 Phase,
50/60 Hz
Large-scale projects:
>1.5 MW, net AC
External inverters
Base package:
250 kW, net AC
Internal invertersInputs
Any blend of Biogas (1), Natural Gas, Hydrogen, and Propane
5-20 psig (15 psig nominal) input pressure
No waterPerformance
46% efficiency, net AC (2)
Load tracking
Zero to full powerEmissions
NOx < 1.5 ppmvd (3)
Sound < 70 dBA @ 3m, <65 dBA @10mPhysical
Large-scale projects:
Up to 25 MW/acre
Base package:
20.5’ x 8.5’ x 9.5’ (L,W,H)Other
UL 2200 package
UL 1741 SB grid-tie inverter
Remote monitoring
1. Sulfur: < 30 ppmvd; Siloxanes: < 100 ppbvd; Oxygen and nitrogen: no limitations
2. Measured according to ASME PTC 50 at 15 C and 1 atm
3. Products comply with emissions limits in South Coast AQMD
Resources
Explore Mainspring's capabilities through our resources highlighting fuel-flexible, dispatchable power solutions. See how we drive cost savings, carbon reduction, and accelerate the path to a net-zero carbon electric grid.
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![download image]()
Brochure: Data Centers
Rapidly deployed onsite power generation providing 24/7/365 prime power or carbon free multi-day backup as required
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![Brochure: Fleet Charging Profiles]()
Brochure: Fleet Charging Profiles
Three use cases for EV Fleet Operators to deploy onsite charging infrastructure
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![Brochure: Biogas Power Generation]()
Brochure: Biogas Power Generation
High efficiency, clean power generation increases top line revenue while delivering best-in-class low total cost of ownership
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Brochure: Electric Utilities
Fuel-flexible, fast-ramping, local power generation for the net-zero carbon future
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![Article: Insights for Fleet Operators]()
Article: Insights for Fleet Operators
Challenges, considerations, and solutions in EV fleet electrification
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![Guidehouse White Paper]()
Guidehouse White Paper
Introducing Linear Generators to the Rapidly Evolving DER Landscape
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![E3 White Paper]()
E3 White Paper
The Role of Firming Generation in Microgrids
A California Case Study, Analyzing Four Microgrid Technology Configurations
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![Webinar: Smart Energy Decisions]()
Webinar: Smart Energy Decisions
Kroger Discusses its Mainspring Linear Generator Deployments
Cost, Resilience and Sustainability Benefits of the Latest DER Technology. A free one-hour webinar by Smart Energy Decisions
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