AiLi Voltmeter Ammeter Voltage Current Meter Voltmeter Ammeter 100V 350A Caravan RV Motorhome 999 AH

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Worked perfectly right out of the box. Nice heavy duty acrylic base and super heavy hardware. Simple operation is refreshing in this overly gimmicky app-inundated world we live in. Some other manufacturers could take notes from this monitor! Others have said there is no way to secure it into your cutout if you can’t access the back. I can confirm that. However , a 2 1/8” hole saw produces a perfect fit in plywood. I didn’t need it but one could add a single layer of electrical tape around the perimeter for a super snug fit. Yes, cord is too short. Ended up being just enough for my application. You can extend it without too much trouble. It’s a standard 5 pin JST-XH. Battery sampling wire I used was 18awg. The screw terminals on top of the unit worked great. Philips, very small. Consider tinning the end of your wire and then smashing it flat and trimming it square for a good connection. 18 gauge is probably about as big as it will accept. Even the backlight is great. When the backlight is turned off the screen still glows ever so slightly so you can read it. Perfect for nighttime in the woods. The screen is quite shiny so consider glare from windows when installing. The accuracy of any monitor depends on your configuration! For my one year old AGMs I used 50% of the rated capacity and charged them up fully with a good 3 stage charger before connecting this monitor. Then set the current SOC to 100 and forgot about it. I set zero % SOC voltage to 10.1. Have a couple weeks camping in the RV so far with good results.

Works well, easy to install and having an extension cable for the display included is very handy. Provides more useful information than a simple volt meter, allowing you to understand what's actually going on with your battery system. Great for checking solar input

I installed this meter in my DIY portable solar generator that I recently retrofitted with four 3.2V 280Ah prismatic LiFePo4 cells after many years of using AGM batteries. Neither the solar charge controller or my simple voltmeter were able to measure amps in and out to provide an accurate indication of state of charge for the LiFePo4 battery. This current meter was easy to install, and if you follow the directions carefully, is easy to calibrate to the specific capacity of your battery. While it lacks Bluetooth connectivity, it is offered at a price point that makes it an exceptional bargain. The shunt is well made and appears to be of durable construction (I chose the 350A version). The meter is flush mounted and of very low profile. The function buttons work reliably and while the display options are quite simple, the information displayed is critical for clearly and accurately presenting the battery's state of charge, which is calculated as a value of remaining amp hours and as a percentage of total capacity.

Have had this unit now for a few years in a travel trailer with solar setup and it has performed flawlessly. Keeps track of input and output accurately, both in amps and voltage as well as reserve capacity remaining. So far very pleased with it. Instructions were clear, installation was fairly simple for anybody with basic wiring skills. Comparable with more expensive units at a serious discount. Would recommend.