SEP2 specifies the following bit-field definitions. ESPI should map one-to-one to this list. ESPI has shifted the bit fields by one bit and SEP also has an additional item defined.
Bit 0 - isMirror - SHALL be set if the server is not the measurement device
Bit 1 - isPremisesAggregationPoint - SHALL be set if the UsagePoint is the point of delivery for a premises
Bit 2 - isPEV - SHALL be set if the usage applies to an electric vehicle
Bit 3 - isDER - SHALL be set if the usage applies to a distributed energy resource, capable of delivering power to the grid.
Bit 4 - isRevenueQuality - SHALL be set if usage was measured by a device certified as revenue quality
Bit 5 - isDC - SHALL be set if the usage point measures direct current
Bit 6 - isSubmeter - SHALL be set if the usage point is not a premises aggregation point
Bit 7-16 - Reserved