Review on 🔌 KETOTEK AC Voltmeter Panel Mounting Meter AC80-300V Frequency Counter 45.0-65.0 HZ LED Display Voltage Volt Frequency Meter Tester Gauge by Antonio Urbina

Installs 1 in a handy box with socket, for portable measurements only. 2 in the 5th wheel, 1 total supply 30a, 1 only for the water heater to answer whether it is on, whether it is heating. With , electric kettle, microwave and electric heating or air conditioning. Maximum power draw needs to be monitored when only a 20A power supply is available. They are inexpensive, easy to read, easy to install and appear reasonably accurate. It just eats from itself, it reads 0.03 amps. Two 1500 watt heaters show about 25 amps. That's plausible. The tension seems right. I am very happy.