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Baomain Single Phase Energy Meter 2 Wire 220V DIN-rail Type Kilowatt Hour kwh Meter 60Hz 20 (100) AAmazon$24.99
GUETNEU Color Digital Display Energy Meter Multifunction Tester AC Rail-Mounted Meter GT2P-E, AC 80~270V, 0~100A, 0~25KW, 50/60Hz. Measurement of AC Volts, Amps, Watts, Hertz, PF and Kilowatt-HoursAmazon$30.89
Nikou 3 Phase Power Meter DTM024 Digital LCD Display Energy Meter Electric Kilowatt Hour Meter, 220/380V 5-80AAmazon$19.53
Valley of the Kilowatt HourDeepDiscount.com$94.99
P1 Bluetooth Smart RV Surge Protector 30Amp EPO | Real-time LED Display, Kilowatt-Hour Meter, Voltage Protection, Circuit Analyzer | UL Listed Weather Resistant 125VACAmazon