Ishtirak Meter Bundle — know exactly what you are using
Two meters that end the argument about your generator bill. One measures everything coming into the house; the other tells you what a single appliance is really costing you. SONOFF POW Elite 20A — reads your whole incoming line in real time. Smart Plug with Power Monitoring — plug any appliance into it and see its draw. Both are read from your phone. Nothing is sent to the generator operator.