Market Support Services (MSS) projects are settlement generators tracked at the ISO-NE level. This means the MWh output is being sent to the grid. MSS data is uploaded into the GIS directly from the ISO-NE.
NON projects are behind the meter generators, where the MWh output is staying onsite, so not being tracked in the ISO-NE settlement system. Data for NON projects can either be self-reported or uploaded into the NEPOOL GIS by an approved Independent Verifier.