AILI TR16 Shunt Battery Monitor, 8-120V up to 500A Voltage Current Meter, State of Charge Display up to 999AH, Compatible with LiFePO4 Lithium AGM Gel – for RV Camper Caravan Boat Solar Off-Grid
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Availability:
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Arrives
Wednesday, Aug 5
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Size: 8-120V,0-500A
Features
- SHUNT BATTERY MONITOR Read State of Charge (%), voltage (V), charge/discharge current (A) & remaining capacity (up to 999Ah) in real time like a fuel gauge for your battery bank. Includes 350A / 500A precision shunt for accurate coulomb counting.
- UNIVERSAL COMPATIBILITY 8V120V, supports 12V / 24V / 36V / 48V systems. Works with LiFePO4, Lithium-Ion, AGM, Gel & Lead-Acid batteries. Perfect for RV, camper van, marine boat, solar off-grid, golf cart, motorhome & home battery backup systems.
- BACKLIT LCD DISPLAY & EASY DIY INSTALL Large, clear screen readable in any light. Ultra-low standby draw (5060A) protects your battery. Memory retains data after power-off. Most users install in under 20 minutes no electrician needed.
- COMPLETE KIT INCLUDED Package contains display meter, 2M extension cable, 350A/500A current shunt & user manual. Self-powered (880V), no isolated power supply needed. Programmable capacity (0.1999Ah) fits any battery bank size.
- WORRY-FREE PURCHASE 30-day hassle-free returns & responsive customer support. Trusted by 2,200+ verified customers with 4.3-star rating. Compatible with all major battery chemistries. If you have any issue, contact us we respond within 24 hours.
Description
Founded in 2017 by Dr. Kevin Li, HENGSHAN reimagines solar power—making clean energy accessible. We offer industry-leading panels, high-performance kits, smart batteries, and IoT solutions for RVs, off-grid, outdoor, and home backup. Rugged, easy to install, and built for any environment, our products blend innovation, durability, and affordability to empower energy independence. HengShan: Innovating solar for a smarter, sustainable tomorrow. HENGSHAN was founded in 2017 by Dr. Kevin Li with a clear mission: to make clean, reliable solar power accessible to everyone, for everyday life and adventures alike. We combine advanced R&D, user‑centric design, and smart IoT integration to create highly efficient, rugged, and easy‑to‑install solar solutions. We stand out by balancing top performance, durability, and affordability for real‑world use. We love empowering global users to achieve energy independence and a smarter, more sustainable future. Real-Time battery voltage display, supports 8-120V. Rated current: 350 A,Peak current: 500 A. Supports 0-999 Ampere-Hours (Ah). Real-Time remaining battery percentage display.
Brand: HENGSHAN
Material: Polycarbonate (PC)
Item Weight: 400 g
Number of Items: 1
Unit Count: 1 Count
Brand Name: HENGSHAN
Unit Count: 1 Count
Voltage: 120 volts
Part Number: AL-16-80V-350A
UPC: 655779539963
Manufacturer: HENGSHAN
Included Components: Meter, 2M Cable, Shunt, Shunt bracket, Manual
Model: TR16-500A
Material Type: Polycarbonate (PC)
Item Weight: 400 g
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Wednesday, Aug 5
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Size: 8-120V,0-500A
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.
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Reviewed in the United States on February 19, 2024 by Amazon Customer
Size: 8-120V,0-500A
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.
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Reviewed in the United States on May 3, 2021 by Fish1960
Size: 8-120V,0-500A
NO INSTALLATION INSTRUCTIONS, I guess they want to save 1/4 cent on any. I had to go through the Amazon.com Q&A to find out how to make this work correctly. I was close to returning until a found out all the missing information. Attaching the small wire can be a delicate operation. I was able to order the special cables this needs since the bolts are bigger than standard battery cables but that is probably for the high wattage it can handle so that is not a problem but be aware. Hardware is pretty good quality. There is a similar item selling for slightly less but I am reviewing the one I bought.
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Reviewed in the United States on August 24, 2023 by Frequent Amazon Customer
Size: 8-120V,0-500A
Kudos to Amazon, item was delivered 2 days early. Aili Monitor was easy to install, programming was uncomplicated. It is working as it should.
Reviewed in the United States on June 7, 2026 by Amazon Customer
Size: 8-120V,0-500A
Working well. Used it for my boat stereo's two 200Ah batteries in parallel (500 amps). It's wired up isolated from my boat starting and house batteries. Worked perfect as a state of charge gauge. Uses about .001 amps with it's backlight off. Instructions are pretty clear on setting it up and calibrating it. I didn't do the discharge to zero just cuz I didn't have a way to discharge them quickly. I fully charged them, hooked up this shunt, and set it for 100% charge which is about 13.3v on these LFP batteries.
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Reviewed in the United States on July 13, 2026 by Todd A.
Size: 8-120V,0-500A
simple tool to help monitor battery health. it gives discharging OR charging status, one or the other, not both at once. in the end, total Ah discharged is our main focus so we can learn our overnight consumption. have 2 200ah lifepo4 batteries from amperetime. easiest to set meter when batteries are new and fully charged for accurate display. as they age, resetting Ah capacity will be necessary to stay in ballpark of actual Ah capacity but that is to be expected of most basic battery monitors. the trickest part to get Ah IN from solar charge controller as well as see Ah OUT of the battery bank was to put the SCC and inveter cables for the negative side on the P- end of the shunt and NOT use a hopper from P- to the copper bus bar amperetime recommended when we paralleled our batteries. our battery negative cables are on the negative bar and all positive cables (SCC, Inverter and 2 battery lines) are on the postive bar but the meter would not count properly when SCC and inverter were on the neg bus bar. whatever...it works great now and we are pleased with our purchase. BTW, we use a victron 30a AC charger as a back up for when solar may not fully charge our batteries. in order to know exactly how many AH our 3 wk old batteries had, we discharged the bank to below 11v, (which was okayed by amperetime for testing purposes only), then one by one, we recharged with the victron to see actual Ah input to the batteries for accurate Ah capacity. after resting 12 hrs and good, close voltage we reconnected the pair in parallel and all has been working well to power overnight electric requirements and get fully charged by solar of the 40% discharged by mid day on roughly 220w max of solar charging by our renogy roverli40amp mppt charger.
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Reviewed in the United States on July 22, 2022 by Paula H
Size: 8-120V,0-500A
Seems accurate. The shunt is made appropriately for what I expect will be long life. Relatively easy to program. As other mentioned, it seems a bit chintzy for the maker to not include a lead for the positive terminal, but to be fair, if you're wiring a shunt you'll likely already have light gauge wire and terminals laying around. I used a 2.25-inch hole saw to cut out the hole for the gauge. It was too big and I had to wrap rubber electrical tape around the gauge to make up the difference. As others suggest in their reviews, a 2.125-inch hole saw is the correct size. I left the display on the "gas gauge" setting so my non-technical users could understand the state of charge on a 200-amp hour lithium battery. The display is clear, readable and easy for non-technical users to comprehend. I bought this on the recommendation of Will Prowse of Mobile-SolarPower and he's not not steered me wrong in his product reviews. This product offers good value for money for my particular use case.
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Reviewed in the United States on September 10, 2025 by A Kindle Customer
Size: 8-120V,0-500A
I was initially excited about this product. There were downsides to it, most particularly the fact that the wire connecting the meter to the battery is only 6 feet long. The other downside is that my batteries are mounted outside my RV. Therefore, critical connections to the meter are exposed to weather. This is a removable issue of course but further complicates installation. So, I extend the wire, waterproof the connections near the battery and hook everything up but the meter works only intermittently. It was a days worth of work installing this and obviously am disappointed. Another matter bears explanation. This meter records both voltage and current. The batteries condition is compared to the manufacturer's amp hour rating but the amp hour rating changes based on draw on the battery. A battery may have a 100 amp hour rating with a 1 amp load but a 50 amp rating with a 20 amp load. Thus, the numerator is imprecise. So, I am returning this meter and reinstalling the twenty dollar Baylite which I also purchased on Amazon. It displays both voltage and current use. For current I can calculate battery capacity on my own. My batteries are rated at 140 amp hours. If I draw 20 amps, I have seven hours of total service until the battery is depleted. Of course, I would only run that load for 3 hours so that my battery capacity remains above 50 percent.
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Reviewed in the United States on August 4, 2020 by wind