DC 12V 24V 36V 48V 72V Battery Meter, Battery Capacity Voltage Monitor Gauge Indicator, Lead-Acid&Lithium ion Battery Tester, for Golf Cart RV Marine Boat Club Car Motorcycle - with Alarm, Green

I bought this to integrate into a motor controller build for a trolling motor. It works great and is highly visible day or night. I like knowing the condition of my battery throughout the period of use and this makes that possible with sufficient accuracy. I liked this meter so much that I bought two more to use in other upcoming dc power projects.

I didn't find the "advanced" menus, even after multiple attempts, but I didn't see them as offering anything that useful either, as I just wanted a display of the battery state for my kids powerwheel when I upgraded it to use a 40V battery, which for that, it does a splendid job of. The display is clear, easy to read, and shows what I want to know. %, Voltage, and a "1-6" segment display of battery life. So I can really easily tell at a glance how close my kid is to killing the battery. (So far, VERY FAR...)

6mA current draw at 12V, <1mA if turned off/after 10s auto-off. Doesn't appear to really use more or less current for backlight, however. Percent reading vs Voltage for AGM/SLA seems off (inaccurate), depending on the source that you use for the curve. 13.03V input reads as 100%, 11.9V reads as 56%, 11.1V reads as 26%. Formulas I've derived off of some SLA battery data sheets show that 12.85V should be 100%, 11.9V should read 40%, and 11.1V should be about 0% capacity. So, it generally overrates the remaining capacity. 11.1V should be a totally flat battery, not 26% left. Still, it's usable if you take that into account. Each device is probably different due to "quality control" being fairly poor on stuff like this. Just make a quick chart or something. I'll just say 50% capacity is actually when it reads as 62%, and 50% capacity is often when a person should consider charging a battery to prevent damage. Display is relatively bright for 6mA and is clear. Included cable is short but uses a standard plug, or can be extended by soldering onto the wires.

a little to detailed to set up but that's due to the different voltage parameters it can measure. the English grammar isn't the best but good enough to follow the setup procedure. it works very well, I'm satisfied.

Tac works great, ran it on a go-cart with a beefed up flywheel, carb and billet internals...needed to see rpms after building. Can be used with several 1 cylinder, 2 cylinder 4 cylinder engines... Dont let it get wet in rain...screen fogged up, still functioned just not readable.

The instructions aren't that hard to follow if you read them a couple of times. But in spite of the instructions making it very clear that if it doesn't work, it's the user's fault, not the unit...I can confirm that at least it's not THIS user. For an accurate reading, the two critical setup items are battery type and number of cells contained in the battery. I can definitely confirm my unit is set to "F" for a LiFePO4 12v battery and "4" for number of cells...the number provided by the battery manufacturer, not by me guessing or doing voltage math. I did not alter the preset options for other user-preference settings, leaving only the "backlight" option, which was set when I got it. I ran my portable fridge for about 12 hours. Charger showed it was down about 25% (as far as I can tell by the charging light indicators - but was definitely below 100%). This product continued to show a 100% charge, both while the fridge was connected and after it was disconnected. Unless the manufacturer can point out something I've overlooked after very careful reading of their instructions, it's a waste of money in my case.

The display covering is a bit delicate, and when I accidentally tossed it into my fishing tackle box, I noticed a tiny frosted mark on the screen. (No points off, because I should have treated it a bit more carefully.) This is awesome, because, I already ran out of battery twice and had to paddle home, but with this monitor, no more paddling is needed. The program is fairly easy to set for the battery type and voltage, and once you set up the choice you want, it remembers it until you wish to reset for another purpose. (even after disconnected from any power). I wish that it would beep when it reaches the alarm zone, but it only flashes, so you have to keep your eyes on it. But having the peace of mind to knowing just how much battery is left is priceless!

Added to my golf cart because the factory led bar graph one failed. Bought this one to see voltage and it works great for that. The battery bar graph not so much but I expected that based on other reviews before buying. My cart is 36V. My multi-meter measured 38.2 volts at battery terminals (my cart was was not fully charged due to driving it around that day). This meter I wired in off the key switch and it also showed 38.2 volts so it is accurate. The leads are pretty short but since I wired to the key switch on the dash it worked for me. Yes the voltage moves around when driving cart as would be expected. There are charts on the web showing voltage reading for golf cart state of discharge. In my case 37.1V equals batteries at 70% charge. That's when I know to throw on the charger. You never want to go down to 50% charge (36.3V) as this reduces overall battery life. It is also easy to read in daylight.

Only one meter arrived.

pas rien pour fixer pour le compteur et aucune méthode de fixation Malheureux..

The item doesn't read the voltage and when I asked about a different one they never replied. Plus if I want to return the item I have to pay have the cost of what i paid for the item

Looks ok should work for what I need just need to finish building the bike before hook up