NOVELTY - The system (100) has an integrated resettable overcurrent protection device (107). A first electrical connection point (103) is electrically connected to an electrical distribution grid (150). A second electrical connection point (104) is electrically connected to an on-site power generation system (130). A measurement and communications module measures characteristics of energy that flows through any of the first and second electrical connection points. The measurement and communications module communicates the characteristics of the energy flow to an electrical distribution grid operator.    USE - Meter collar system of metering system (claimed) e.g., customer site-side system and utility-side system, for plug-in connection of grid-quality DPGS. Uses include but are not limited to solar cell arrays, battery or fuel-cell storage systems, electric vehicles, and small wind turbines.    ADVANTAGE - Enables ''plug and play'' connection of on-site power generation resources, since meter collar has receptacle for a ''plug'' from on site power generation and overcurrent protection. Compliances to interconnection requirements for safety, power quality, and automatic disconnect capabilities are maintained. Enables a corresponding utility or equivalent wholesale power provider to own DPGS and to connect power generator directly to grid, without passing electrical energy through the customer's structure or meter. Secures DPGS connection when in use, and significantly reduces the costs of deploying DPGS.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a metering system.    DESCRIPTION OF DRAWING(S) - The drawing shows the schematic diagram of a customer site-side system implemented by a meter collar for plug-in connection of grid-quality DPGS.    Meter collar system (100)    First electrical connection point (103)    Second electrical connection point (104)    Integrated resettable overcurrent protection device (107)    On-site power generation system (130)    Electrical distribution grid (150)