DC Multifunction Battery Monitor Meter, 0-200V 0-100A LCD Display Digital Current Multimeter Voltmeter Ammeter for Cars Rv Solar System

I am using it for a dingy with 55 lb trolling motor and a 50 Ah LiFePo4 battery, and it is perfect for this role.1. all info you need on one screen - voltage, current, Ah/Wh, remailing capacity. Having battery internal resistance and load resistance computed is also very useful.2. it memorizes accumulated values (Ah/Wh) when powered off - no need to use an optional backup source. You manually reset these values after fully charging your battery.3. it also measures all parameters when charging (charger connected to "load" terminals) - so you have exact Ah/Wh pumped into the battery even when your charger doesn't show it.Overall, a well designed device. Instructions in English good enough, readable and clear.

Works as it should. Came quickly. Only thing the directions are a little difficult, but for the price not a problem.

Would be 5 stars, but two things: it is 5/16 which is annoying because most things around the 100A level are 1/4, and only 2 of the included wires have ring terminals and are comically, I mean laughably, short. Like come on guys, what 100A power system has positive and negative terminals within 6 inches of each other that don't need ring terminals? Change the red/black battery terminal wires to 36 inch and at least throw the ring terminals in the box.

This was easy to install and provides much better information than the simple 4 dot battery level on our camper.

The provided cables are 6" in length at the most so if your trying to mount it anywhere besides just sitting on top of the batteries you're going to have to get some longer wires rig up and a way to attach them to their connections.

I purchased the 100amp version and was pleasantly surprised by the accuracy - even when running a 0.5amp load.. Accuracy was confirmed for current and voltage readings with calibrated multimeters.Easy setup, the diagrams in the instructions are very clear and are conveniently reproduced on the back of the meter itself. The meter frame has snap fit tabs for mounting in a panel, cabinet or case.The interface for setting the meter to the correct voltage range for your batteries (which you must do to get accurate state of charge info), clearing readings, etc is a little fiddly and inconvenient, but works just fine.Keep in mind this is a meter only, it will only take measurements of how much power passes through it, it isn't smart enough to track charge/discharge, and will not do anything to prevent over charge or overdischarge of your batteries.

Buy something nicer, hard to wire.

The only thing that I could say might make this better for my particular project would be a slightly smaller control unit. Space was at a premium for my project but I made it work and it does its job VERY well.