Review on 🔋 RC Watt Meter DC 60V/100A: Digital LCD Battery Power Analyzer & Volt/Amp Meter by Joseph Hamilton

This meter has many good qualities showing current, voltage, power and energy. But there are a few small problems. 1) Requires approx. 0.5 W for operation. This may not be bad for some projects, but it really annoyed me when I wanted 4 meters, which results in a total loss of 2 watts. This is too much and I had to insert DPDT switches to bypass them when not needed. 2) There is a poorly documented external power connector. This allows the measuring device to be operated with low voltages. However, this doesn't seem to change the power dissipation, and you're still losing -0.5W in the meter. 3) There are no installation functions. I had to find a way to fix it and I have no plan for it.