Review on 🔋 MNJ MOTOR DC Battery Monitor Meter: 0-200V 0-100A LCD Display for Cars, RVs, and Solar Systems - Digital Multimeter Voltmeter Ammeter with Current Shunt Wiring Kit Set by Michael Gonzales

I bought the 100 amp version and was pleasantly surprised at the accuracy - even with a 0.5 amp load. The accuracy of the current and voltage readings is confirmed by calibrated multimeters. Easy to set up, the diagrams in the instructions are very clearly and conveniently reproduced on the back of the meter itself. The meter frame has snap tabs for mounting in a panel, cabinet or enclosure. The interface for setting the meter to the correct voltage range for your batteries (which you need to do to get accurate state-of-charge info), clearing readings, etc. is a little cumbersome and fiddly, but it works just fine. Keep in mind that this is just a meter, it only measures how much current is flowing through it, it's not smart enough to track charging/discharging and it doesn't do anything. to prevent overcharging or deep discharging of batteries.