Axiom Energy Group


Marathon Engine Systems is now part of the Axiom Energy Group.
Visit our new website at

Energy Star Emerging Technology

ENERGY STAR Emerging Technology Award

The EPA gave its prestigious award for our ecopower® microCHP.  Marathon Engine Systems was one of two companies nationwide to win this award in 2011 and 2012, for its combined heat and distributed generation solution.

Visit the new ecopower® microCHP product website at

Hotel and Restaurant HomeTown HallCar Wash and LaundromatTruck StopApartments  

Marathon Engine Systems is a growing company focused on innovative products for prime and remote power applications with emphasis on energy efficiency and savings. Our main product is the ecopower® microCHP. The COGENERATION tab above explains the various applications where small scale Combined Heat and Power systems (microCHP) can benefit you. This is an established, environmentally-friendly technology that is gaining acceptance in North America and is considered by some to be the "Future of Distributed Power Generation."

Prime Remote Power is also an area of focus for Marathon. We have a number of products that can be applied to long term power needs for telecom sites, railroads, and oil field applications.

Thank you for visiting our website and for your interest in our products. If you have a special project requiring custom manufacturing that could be satisfied with our unique capabilities, please contact us at 262-642-6436 or use the Contact Us page

Energy Update

Stimulus Plan Incentives

States are becoming more aware of CHP technology and are changing their incentive and rebate policies on a regular basis. Check your local registry and utility company for your state's specific policies.

The DSIRE Database of State Incentives for Renewables & Efficiency is an extensive guide to state, local, utility, and federal programs supporting environmentally friendly technologies, including Combined Heat and Power. Click on the link above for details.

Oak Ridge National Laboratory Report Highlights

"Combined Heat and Power
Effective Energy Solutions for a Sustainable Future"

A report by the Oak Ridge National Laboratory points out that more than two-thirds (67%) of fuel used to generate power in the U.S. is lost as waste heat.

The report projects that if CHP were to produce 20% of all U.S. electricity by 2030 (several countries have already achieved this level):

Our ecopower® microCHP was installed in the Epping, NH, town hall.

Cogeneration Cited as a Viable Technology in Report

Greenhouse Gas Report

CHP Promoted

The U.S. Department of Energy and the EPA have issued a report entitled "Combined Heat and Power A Clean Energy Solution" that highlights the potential energy savings.

Marathon Engine SystemsLocated in East Troy, Wisconsin,
Marathon Engine Systems is a systems oriented
company focused on products engineered
toward prime and remote power applications.
262 642-6436

Wisconsin Green Building Alliance

© Marathon Engine Systems, All Rights Reserved

 What's New at Marathon?  

Four ecopower® Units
Run in Parallel

Marathon Engine Systems configures up to four units to run in parallel, simultaneously outputting more than 17 kW electrical and 45 kW (153,000 BTU/hr) thermal power. For variable building energy needs, only the required units are started.

Visit our What's New page for more news

ecopower Parallel Operation

The energy efficient ecopower® microCHP was on display at the 2016 NAHB IBS Show in Las Vegas.

The ecopower® microCHP simultaneously provides heat and electricity. Below, the unit shown in an earlier show.

ecopower at IBS Show 2013

ecopower® Novel Car Wash Installation

The ecopower® is generating heat and electrical energy in an innovative, energy savings application by N.E. Mitchell Co. at a New Milford, CT, car wash facility. The ecopower® was presented in a ribbon cutting ceremony.

Parallel ecopower® microCHP units are installed in the  First Affordable LEED Platinum Building in New York.

Parallel ecopower at the Bronx

ecopower VideoInnovative Propane Technologies: Micro Combined Heat and Power (CHP)

Training Video - Innovative Propane Technologies: Micro Combined Heat and Power (CHP)

An Energy Efficient Heat and Power Solution brochure:

An Energy Efficient Heat and Power Solution