AiLi Battery Monitor Voltmeter Ammeter Voltage Current Meter 8-80V 0-100A Auto Car Motor Boat Caravan RV Motorhome
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- Read your battery bank like a fuel gauge. Battery Status At A Glance.
- Combines many functions in one, these information leads to more efficient use of the battery, which can enhance battery life and reduce the risk of failure.
- State of Charge (%),The remaining battery capacity (AH). Charge and discharge current (A), Voltage (V).
- Charging status indicator, looks like a smartphone.
- It is suitable for mobile and portable equipments, e-bike, balance cars, cleaning machines, instruments, ups and so on.
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This Battery Monitor is designed to monitor performance most kind of battery systems with capacities of up to 999 Amp hours.
Read your battery bank like a fuel gauge.
Battery Status At A Glance.
Combines many functions in one, these information leads to more efficient use of the battery, which can enhance battery life and reduce the risk of failure.
State of Charge (%),The remaining battery capacity (AH).
Charge and discharge current (A), Voltage (V).
Charging status indicator, looks like a smartphone.
It is suitable for mobile and portable equipments, e-bike, balance cars, cleaning machines, instruments, ups and so on.
This item is suitable for lithium batteries, lithium iron phosphate batteries,
lead-acid batteries and nickel-metal hydride batteries which working voltage is from 8V to 80V.
Have memory function.
Doesn't require isolated power, self-powered 8-80V.
It is very easy to install.
Working voltag: 8.0-80.0 V
Current range: -100~+100 amps
Capacity range: 0-999 ampere-hour
Working consumption: 10.0-12.0 mA
Standby consumption: 0.5-0.6 mA
Sleep consumption: 50-60 uA
Voltage accuracy: ± 1.0 %
Current accuracy: ± 1.0 %
Capacity accuracy: ± 1.0 %
Preset capacity value: 0.1-999 Ah
Temperature range: 0-35℃
Size: ø59mm*20 mm
Mounting hole: diameter 54mm
The auction includes
1 x Battery monitor
1 x Current sampler
1 x 2 meters long cable
1 x English operation manual
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I don't write many reviews, but after installing this and using it now I cannot believe the product for the price. It really does an amazing job for the price. If you really want to know what is happening with your batteries then this is the only way to go, don't go by a rough estimate when this can give you an exact count on storage of electricity.
1. Capacity is limited to 100Ah. That's not enough for most any battery. I suggest you just use battery votage to determine state of charge. It's more accurate anyway.
2. Mounting is terrible. The flange is very small (2.5mm) and the bracket has to bent to catch the panel, then loosens over time.
3. The backlight blinks while the battery is charging. That's very annoying in a trailer at night!
4. The instructions are in Chino-English:
"Generally the zero capacity voltage do not need to set. The default is 0V, mean invalid. If you want to set, please understand the actual charge and discharge voltage of battery firstly."
Spend long enough and you'll decipher most of what it says. Why can't these manufacturers have an English speaker edit their instructions. It might cost them what, $100?
All is well however, I have something odd happening that I'm in need of help with....
If I start with a fully charged battery bank... 12.7v or more & showing 100%... and then turn on my inverter, just long enough to run my 900w microwave for ~2 min, my voltage screen drops down to about 11.5 volts until the 2 minutes are up and I turn off the microwave. At that time the voltage quickly climbs back up to about 12.6v or so... indicating that I still have plenty of power in my battery bank. I would expect that. No problem.
Unfortunately, if I look at my PERCENT screen it now shows that I have dropped all the way down to zero (0.00%). It will then attempt to build back up to 100% and finally only reach ~10% after the entire day... with plenty of charge coming in via my 600 watts of solar panels. The voltage screen will show something up in the 13.0v or more range at the end of the day.
Anyone see anything like this? Solutions?
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After upgrading my Travel Trailer to 2 6 volt batteries, and wanting to be careful not to deplete them below 50% capacity, I realized that the 'battery monitor' that came with my trailer and is integrated into the tank capacity monitor, is completely useless.
For most batteries, any resting voltage 12.6v or greater is 100% full, 12.06v is roughly 50% full (the point at which you typically don't want to discharge below on a wet cell deep cycle battery), 11.58% is 20% capacity (you can drain your battery to this point if in desperate need but it will definitely reduce the life of your battery significantly) and 10.5% is 0% (your battery is likely damaged and not good anymore).
However, the battery monitor that comes built in to most travel trailers or RVs simply measures the current voltage and then displays a certain amount of LEDs typically as follows:
- 4 LEDs = C = Charging = 12.7v
- 3 LEDs = G = Good = 11.9V (at 11.9v the battery is actually 60% drained which is actually not 'good')
- 2 LEDs = F = Fair = 11.2v (which is not actually 'Fair' as 11.2v = over 90% discharged and is actually not 'fair' - you're ruining your battery significantly)
- 1 LED = L = Low = 6 volts (at 6 volts, your battery is basically toast! You may be able to bring it back to life with a very slow trickle charge to slowing bring the voltage up as to not further damage it but your battery will never be the same again)
The other significant flaw with the battery monitor that comes built into RVs is that it measures the current voltage to tell you the current capacity of the battery. This is flawed because any recent draw on the battery will make the voltage read lower than it actually is. Any recent input to the battery, through solar or shore power for example, will make the voltage read higher than it actually is. To accurately measure the voltage of a battery it needs to sit for at least 24 hours, ideally even longer. This is obviously not practical when you are camping and want to monitor your battery state day to day.
Enter this awesome Battery Monitor off Amazon! This is a high quality battery monitor that accurately monitors the capacity of your battery at a fraction of the cost of other shunt based monitors. A shunt based monitor actually keeps track of the amps used or put back into your battery to determine it's utilization and remaining capacity. Other shunt based monitors that are commonly used, such as the Trimetric 2030 cost $200+. Perhaps they are more accurate, and we'll never know, but this product is probably as accurate as you likely need. The product is good quality and comes with good instructions. The only improvement in the instructions I would like to see is a little more detail about how to extend the cable that runs between the shunt and the battery monitor. I think most people could use some extra explanation here. The tricky part is knowing that there are a bunch of bare wires wrapped around all the other wires. These bare wires need to be unwrapped from all the other wires and twisted together to make a 5th wire and then connected to one of the wires in the wires you are extending the cable with. The only improvement I would like to see in the battery monitor is the ability to adjust the screen brightness as it's too bright at night time when you're trying to sleep near the battery monitor. It would also be nice to be able to turn the backlighting off completely when going to sleep. The instructions say the battery monitor has memory built into it, I'm curious to see if it remembers my settings after taking my batteries out of the trailer over the winter to charge in the garage or if I will have to set it up again in the spring.
With this battery monitor I can see exactly how many amps each electrical device in my trailer use. Sitting idle, with nothing on, there is about 0.8A being drawn. This is likely the propane detector and the backlit LED screen on our radio as this is all that is drawing power at idle. The fan in ceiling of the bathroom takes about 5 amps. The fan above the stove takes about 3 amps. The furnace fan draws about 3 amps, the main group of lights that we use that were converted to LED bulbs takes about 1 amp, and so on. It's also neat to see how much power my solar panel is putting back into the batteries net of the current draw. My solar charge controller will say, for instance that 6 amps of power is going to the batteries but the battery monitor may only read 5 amps due to the draw of other electrical devices. This is also all very handy for knowing how long I can likely go without shore power. After a couple of camping trips it's apparent that I use about 20-30 amp hours per 24 hour period. My 2 6 volt batteries have 220 amp hours of capacity. Since you don't typically want to drain your batteries lower than 50%, I only have about 110 amp hours to use. If I'm using 30 amp hours per 24 hour period, I can go almost 4 days without shore power. If my solar panel is getting full sun each day and generating 15 amp hours of power, I can add another 2 days to these 4 days for a total of 6 days. As you can see, the battery monitor also is a great tool to buy before investing in any solar panels systems as you can get a feel for how much power you actually use and then design a solar system to match that.
Again, every RV or Travel Trailer should come with this type of battery monitor built in. The one that comes with trailers is completely useless. Buy this Battery Monitor and you won't be disappointed. The extended life you experience with your batteries from not discharging them too deeply will pay for this battery monitor easily.
Also the diameter of the guage is metric. A standard hole saw for 2" is too small and 2 1/4" too big. I ended up using 2", a rasp and a bunch of time to grind the edges out bigger.
To add to this review make sure you don't go over a 100amp draw as then it resets your gauge and you have to start over with getting batteries fully charged and all that. There is one listed with higher amps and I didn't see that till much to late.
It was pretty straight forward to install, if you are reasonable adept at wiring and it seems to be pretty accurate (compared it with the voltmeter and an app I have for my solar charge controller - all read about the same)
The one bad thing is that when the battery is charging, the backlight of the monitor flashes. Helpful, I guess, but not great if it is installed in a camper where you sleep.
I solved the problem by building it into a console with a flip up lid, so it can be closed when I don't need to see it.
The other thing to be careful of when setting it up; be sure your battery is full when setting the capacity to 100% as it has a memory and I couldn't get it to reset. Luckily the battery was pretty much full (and would probably reset if I disconnected the power for longer)
Ive put it down to current in not reading properly as while in boost mode only ready 13amps on the 25 redarc charger.