IPX7 Waterproof Battery Monitor with Bracket 7-100V,12v 24v 36v 48v 60v 72v Digital Display Battery Capacity Remaining Capacity Percentage Tester with Buzzer Alarm and Temperature

Bought this to monitor the voltage on my 24V trolling motor system real-time. I set it up according to the the directions... Mode1: P 24 (lead acid 24V), Mode2: Off (No time-out on display), Mode3: 21.6, 25.7 (0%, 100% SoC), Mode4: 22.0 (low voltage alarm), Mode5: 30 (did not change), Mode6: Off (no temperature display), Mode7: 29.3 (High voltage alarm). It works exactly as stated. Note there is a small amount of error in the voltage reading verses my $300 Innova meter, but it's pretty insignificant.A few noteworthy items:1) This predicts battery state of charge (SoC) purely as a function of voltage. It uses a linear scale with the voltages setup in mode3. 0% at the low voltage and 100% at the high voltage. Unfortunately lead acid battery SoC curves aren't really linear vs voltage, but it gives you an idea of where you are at. Also as the voltage fluctuates with device loads, the SoC reading will fluctuate right along with it. For me it's not a problem, I only really pay any attention to the SoC% (and the Voltage readings for that matter) after a settling period with the trolling motor not being used.2) The device uses power even when the display is off. With the display on and the light on, the unit consumes ~9mA, with the display & light off it consumes ~1mA. This might not be a problem depending on your application, but I store this boat over the winter and don't want any additional parasitic loads or to have to disconnect the batteries every time, so I installed a water proof switch inline with this device to truly shut it down when my boat is not in use.3) The display is quite small. I've not used it on the boat yet, so I can't comment on how easy it is to read mounted 6 ft away (near my feet) in bright sun light. I'll update this later. Update: Installed on the boat and can easily be read from 5-6ft away in most lighting conditions. Note that the glare of the full sun can make any display hard to read.4) The alarm can be silenced by pressing the mode button for less than 1 second.5) The temperature display is only available in Degrees C. I live in the US and prefer Degrees F. I shut off this temperature display, because with my 24V system and the temperatures I mainly use the boat (20-30C) combined with the small display size, I'm concerned it could easily be confused with the Voltage reading.How water proof is it? Time will tell! It will get a full test mounted near the bow of my boat. I'll update this review if the unit fails due to water intrusion.I like the fact that it can be set up for different types of batteries. I plan to upgrade my boat in the future to LiFeP04 batteries and will only have to make a small configuration change to this unit.

Display quality is excellent, accuracy is spot on, hard to beat for the price.

I just got this hooked up on my 72v battery, and for the most part I'm happy with it!Pro's:*One of the only volt meters I could find capable of using 72v or more as it's source power -- Only 2 wires! So easy...*Nice and small, not too bulky, though I do wish I could find an even thinner one*Feels durable, and has good weight (doesn't feel cheap)*Easy to mount and looks great in an enclosure*Has a really nice screen -- don't forget to peel the plastic cover off!Con's:*There seems to be no way to adjust/calibrate the unit, which is a feature of many other similar products*The one I received is off a bit, and reads high by 0.6V. It still serves its general purpose in my case and isn't a huge deal for me. Technically it is within the advertised "1% accuracy"*When I connect my unit/turn it on, there is an initial flicker, then about 1 second later the screen comes on. Not a huge deal but feels kinda clunkyAll in all, it seems to be pretty okay and I would happily buy another one, though it would be nice to have a larger selection of these small sized higher-voltage meters on the market. I hope it continues to work, and will update my review if anything changes. Thanks!

I purchased this to install in the top of my new LifePo4 battery. Comes with an instruction book that shows you how to calibrate and set up. Fairly easy to follow instructions with a little bit of technical knowledge. The colors are very readable and contrast nicely. With my volt / amp meter installed It gives very accurate readings. I use this primarily on my battery for trolling motor and on a sunny day on the lake the display is very easy to read. You can’t go wrong with buying this unit !

I have no issues with this product. Works as advertised,

The instruction are horrible! It tells you to set it up before use but, how do you this with out installing it to get power to set it up. THIS IS UPSETTING IN IT'S SELF! I have a life PO 4 battery and to date trying to use the set up cannot get it to read my battery performance. Ive used setting #1 and setting #3 and neither would read my battery status. I would never tell anyone to buy this unit. Its out of my window to return it or I would have. Very dissapointed with it.... I will buy something that works...

I have been using a lifepo4 battery for my trolling motor, and lithium batteries have a different discharge curve than typical lead acid batteries, so the built in battery monitor for the trolling motor doesn't work.This gives me a more accurate idea of how much battery I have left on a trip and know when I need to turn back and head in.This monitor can be selected for many different kinds of batteries such as lifepo4, lead acid, and other battery types. I like the idea of setting the buzzer to go off at a certain level so that you know to start heading back home soon, but I have not set that up yet.overall i like it a lot, it's small, clear to read, and seems like a good deal so far.

Looks good, but voltage registers 0.3 volts lower than actual. Doesn't seem like much, but with 36V golf cart it makes a difference.