Review on 🔌 Poniie PN1500 Portable Electricity Usage Monitor - Power Consumption Watt Meter Voltage Amp Tester (110V, 1500W) by Kevin Webb

Provides instantaneous and cumulative performance measurements. Exactly what I needed to calculate a backup power system for critical equipment. The backlight is on by default. You can set it to turn off 3 seconds after pressing any button, but to do that you'll have to remember the cryptic order of button presses. Also, resetting the time and kilowatt hours isn't easy either. Otherwise a great device, especially for the price. Just remember to keep the manual handy for a while.