Maxwell Farm / Neighborhood Energy, LLC


Scale: 1200 acres

IFES type: anaerobic digester, wind turbine, solar PV


  • odor reduction
  • power generation
  • reduce purchased bedding material
  • enhance environmental and social attributes
  • managing nutrients
  • reuse of engine heat

Description of the system: The heat coming off the engine from the Maxwell’s digester is used to heat their shop, milk house (washdown water), greenhouse, and even their swimming pool (to 92F!). Thanks to their digester, they save 2-3 cords of wood per year for their shop, and $5-6000 per year for the milk house in fossil fuel savings. In the winter, they sell greens from their greenhouse, as well as early-season tomatoes in the spring. They have maintained traditional manure spreading, largel due to their relatively flat land.


  • 225 kilowatts of installed capacity
  • 1.75 million kWh of electricity generated per year
  • Cow Power farm generates electricity and creatively uses waste heat for multiple purposes

IFES Number: 80

City: Coventry

State: VT

Country: USA

Type of Firm: Farm

Main Products: milk, compost

Technology: biogas

Year Installed: 2008

Energy Feedstock: Fats, oils & grease

TCO2 Eq Avoided: 2,180 metric tons CO2E/yr