The energy conservation program is a partnership between the Massachusetts city and utility company Eversource.
Flux Marine recently won a $10,000 prize as part of this year’s Cleantech Open Northeast competition.
Regional Greenhouse Gas Initiative supporters acknowledge other factors but say the program is an important piece.
Cambridge could be the first city in the country to require the labels but would likely face lawsuits from oil interests.
The collaboration, which also includes installing public charging stations, aims to make electric transportation more accessible.