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An RGM (Revenue Grade Meter) is a meter that meets ANSI standard C-12.1-2008 requirements. ANSI standard C-12.1-2008 is an Electric Meters Code For Electricity Metering. It sets criteria for ac watt-hour meters, demand meters, demand registers, pulse devices, and auxiliary devices. In other words, an RGM sets acceptable performance levels for your solar inverter. It is production less consumption that qualifies for net-metering or Solar Renewable Energy Certificates (SRECS).If you read the above …