Waterproof Battery Monitor12v 24v 36v 48v 60v 72v ,Car Motorcycle Golf cart Battery Meter Digital Battery Capacity Remaining Capacity Percentage Tester with Buzzer Alarm and Temperature（Bule）

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.

Works great so far. I soldered some alligator clips to the end of the wires and use it to check the levels of my boat batteries.

Nice display nice and bright and can still read in the sunlight! Use it on my golf cart and love it!! Much nicer than the old bobble gauge. Single mounting hold bracket is ok it does the job and it is easy to remove from the mount if you wish. I set mine up with quick disconnect so I can store it in the glove box in the office season when cart is not in use

Perfect for my testing station I made for the remote battery. I used this monitor in conjunction with some 1/4 inch testing posts for testing automotive components. I mounted this in a cut-out I made in a small project box along with a temporary switch so I could see how the charge is in the battery. It works great!

Good battery monitor perfect for my LiFePO4.

Doesn't come with manual to configure it. So it will always read 100% charge.I'm sure the seller will provide a manual if you give them your email address.I'd rather just give a bad review, trash this item and buy from someone else.They could have put instructions in the listing. Poor job not doing that.Also, screen is very dim. I want it for a trolling motor. In a boat. On a lake. In the sun.Unless you are in the shade, or it's dark out, you can't see if it's on, much less read it.

VERY IMPORTANT! When programming this meter for a single 36v 100ah LifePo4 golf cart battery be SURE TO CHECK THE "STRINGS" of your battery or the % (0-100%) part of the meter will not be accurate. I have a OGRPHY 36v 100ah battery and I finally figured out it has 12 "Strings" inside its design. I searched everywhere and finally found it in the battery app purely by accident.In the programming you have 6 sections 1-6. 1 & 3 are the primary sections used to set up the battery info.Section 1 is to tell the meter what kind of battery, and how many Strings the battery has. In my case this is how the section 1 needed to read. 1 F12. Default on this unit in section 1 is 1 P03, so you need to change it to F (for LifePo4) & 12 (strings).You will need to find out how many strings your battery is designed with...maybe 12 is industry standard, but I'm new to these golf cart batteries.Section 3 is where you tell the meter on the left and right of the screen how much voltage is getting close to dead/recharge and how much full would be. In my case I used 35.0v on the left side for dead/recharge and 40.0v on the right for fully charged. (get specs from manufacturer)The % side of the meter is now exactly identical to the battery app readings.Its really much easier than it appears to be in my review, just sit down, relax and take your time going through the sections. good luck its a great little meter.

It works. Wire leads are maybe 18 gauge wire and are short. They are about 18” long so have some extra wire and connectors unless you’re going to put this right next to your battery.