Hi,
These are a nice meter to monitor the 120 volt side of the RV:
https://www.ebay.com/itm/Digital-AC100-300V-0-100A-BLUE-LCD-DISPLAY-PANEL-VOLT-AMP-meter-With-CT/222...
Regards, Don
My ride is a 28 foot Class C, 256 watts solar, 556 amp-hours of Telcom jars, 3000 watt Magnum hybrid inverter, Sola Basic Autoformer, Microair Easy Start.