Best RV Battery Monitor in 2022 – Expert Reviews

Without a good RV battery monitor, you could go through horrible experiences!  Imagine running out of battery and getting stuck in the middle of a freezing night! Then regret why you didn’t really know the state of charge? Because you didn’t install a battery monitor! 

But we know you’re smart enough to add this kit to your motorhome. Remember, a battery monitor is more than just a display unit for your battery’s state of charge. It provides a lot more information which helps you optimize the battery in the best way possible.

There are plenty of options out there! But the good news is we’ve narrowed down the list for you.  So you can easily choose the best RV battery monitor and do a favor to your battery bank!

Let’s begin checking out the options then!

List of Best RV Battery Monitor:

Best Battery Monitor for RV

Take a look at our top 10 RV battery monitor reviews below and decide which is the most suited one for you!

1. Renogy 500A Battery Monitor

Renogy 500A Battery Monitor

Highlighted Features:

  • Large Backlight LCD 
  • Displays six battery parameters
  • Voltage range 10V-120V and Current Range up to 500A
  • Stores data automatically
  • High and low voltage alarm
  • Backlight shuts when charging current is low

Renogy 500A is probably the most anticipated RV battery meter in the market. Its working voltage ranges from 10V-120V, and you get a programmable alarm for the high and low voltage.

The installation is fairly easy with the convenient shunt holder and 20ft long shielded wire. The shunt attaches perfectly and can tell you about the battery status from a long distance. It doesn’t include any mounting plate, though.

The device automatically stores all the recent battery data. So don’t worry about losing them when the system shuts off. 

To see all the real-time actions and battery data, you’ve got an excellent backlight LCD to go with. These include different electronic parameters such as SOC, Power Capacity, Charging Current, Battery Voltage, Power Consumption, and Estimated Remaining Runtime.

The display and parameter values simultaneously and conveniently flash to alert the users. It doesn’t have any Bluetooth or smart app features.

It provides accurate readings with high-precision measurements, and they’re well within the standard tolerance level of +/-1%.

You can easily monitor the amperage and other functions without relying on guesswork anymore. It alerts you with low power consumption by shutting down the backlight when the charging current is < 100mA, and standby dissipation is one mA.

It doesn’t include any waterproof rating, so be careful while using it in wet conditions. Renogy backs their product with warranty support; however, the after-sales service hasn’t been top-notch, and the company should look into it.

2. Victron Energy BMV-712 Smart Battery Monitor

Victron Energy BMV-712 Smart Battery Monitor

Highlighted Features:

  • 500A/50mV shunt included
  • LCD with navigation
  • Multiple parameters reading
  • Built-in Bluetooth with Smart Application support for smartphones and computers
  • Additional VE Direct Communication Port for remote monitoring
  • Includes an alarm for threshold values

Victron is a reliable brand for motorhomes, and the run continues with this smart battery monitor — BMV-712.

Regarding the installation, it’s not quite a plug-n-play device and probably requires a licensed professional to install it in your RV. But it includes a setup menu for assistance.

This smart battery monitor can be used in RVs having a battery voltage ranging from 6.5 – to 70 VDC.  It also comes with a BMV shunt 500A/50mV, a very low resistance resistor to measure different parameters accurately.

These parameters include Current, Voltage, Ampere-hours, SOC, Time remaining, and Power Consumption. Unfortunately, it doesn’t save or log the data as expected, although there’s an option for historic data monitoring. 

This Victron model has been a popular choice for the Bluetooth RV battery monitor. It allows you to momentarily check the battery parameters in your smartphone (along with its intuitive display) using its built-in Bluetooth-enabled communication system. 

It comes with the VictronConnect app, which is easy to configure and operate and lets you catch potential issues early. 

There’s one more feature: its additional input port (VE. Direct). It allows you to measure other parameters such as midpoint voltage, battery temperature, and voltage of a second battery. This device also lets you to connect to Victron’s smart ecosystem for remote monitoring.

Victron doesn’t mention any waterproof rating. The company provides a reliable warranty policy; however, they should work on accuracy issues when the battery is dead or mostly depleted!

3. HENGSHAN AiLi Voltmeter Ammeter

HENGSHAN AiLi Voltmeter Ammeter

Highlighted Features:

  • Shunt-based programmable battery monitor
  • Working voltage ranges from 8V-100V
  • Current capacity up to 350A amp-hour
  • Includes memory function for saving last tested data
  • Self-powered

Now let’s have our next RV battery monitor on the list. It’s not a feature-rich one but is true to its performance, especially regarding the accuracy. 

When tested, all of the battery monitoring measurements come accurate repeatedly.

This RV battery voltage meter is fairly easy to set up. But a little care is required as the screw fixing and display flange aren’t the strongest ones out there.

Regarding the current range, it’s a shunt-based programmable meter with a current range of up to 350A (supports up to 999 amp-hours for parallelly connected batteries). 

You generally have a small amp-hour battery for RVs, and you can set this meter to that small Ah figure of your battery bank. It’ll do the rest. 

This is a universal battery monitor that supports voltage from 8V-100V. So it should be good for your 12V or 24V RV batteries.

It has a convenient LCD to show different battery parameters at a glance. These include SOC, Remaining Battery Capacity, Charge & Discharge Current, Voltage, and Charging Status Indicator (like your smartphone battery level indicator or a fuel gauge). 

Its up and down arrow indicates whether the battery is in charging mode. It automatically stores the very recent testing data once the system shuts off. The product comes with a convenient warranty policy.

This AiLi battery meter is not a smart battery monitor and doesn’t have BT communication.It doesn’t include any waterproof rating.

4. SIMARINE PICO Smart Marine & RV Battery Monitor

SIMARINE PICO Smart Marine & RV Battery Monitor

Highlighted Features:

  • Shunt based battery monitor
  • Includes temperature sensor, two backup battery banks, and additional tank inputs for multiple battery units
  • Wi-Fi Connectivity and Smartphone Application support
  • IPS LCD Display showing multiple parameters
  • Displays individual current ratings for different RV components

After a budget killer, we’ve got a high-end battery monitor for your RVs — Simarine PICO. 

It’s a dream device for serious campers that makes sure that your battery doesn’t jeopardize your motorhome in the long roads and tough weather!

Well, it’s more than just a simple RV voltage monitor. It can do many things, from monitoring multiple battery banks to working as a barometer or inclinometer. 

The unit has additional tanks and sensors and two more backup battery banks. The service battery bank is compatible with a current range of up to 300A and voltage ratings ranging from 12V to 72V. 

Now let’s look at its display which is made of Anodized Aluminum Casing and Anti-reflective Gorilla Glass. It’s thick and feels exemplary while holding in hand (like your premium smartphone)!

It comes with a large 3.5’’ IPS LCD and is dust and waterproof. The device includes a touch operation and an automatic brightness feature. 

It supports Wi-Fi connectivity that allows your smartphone to connect to the PICO display using Simarine’s free Android/iOS application. So try considering this as your wireless RV battery monitor!

It displays a battery indicator, remaining time, voltage, current, and temperature of your battery. The unit also shows individual current ratings for particular appliances or components of your RV, such as generators, lights, refrigerators, etc. Nothing else you need!

PICO is worth every penny for its cutting-edge technologies. However, it might seem expensive if used only as a battery monitor, or the other features aren’t explored! 

The product is backed by an excellent warranty policy. It even offers a 30-day money-back guarantee if it fails to impress you!

5. Renogy Monitoring Screen for Smart Lithium Battery Series

Renogy Monitoring Screen for Smart Lithium Battery Series

Highlighted Features:

  • Plug and play design
  • Directly communicates to the RV Battery Management System
  • No calibration and configuration required
  • Backlit LCD Display
  • Show SOC, current, voltage, remaining time, capacity, parallel battery numbers,  and warning code
  • Wall Mount

If you’ve lithium batteries installed on your RV and are looking for a smart battery monitor, you can go with Renogy’s Smart Battery Monitor.

It’s almost like a plug-n-play device. You just need to connect the battery bank to the monitoring screen using its RJ45 cable and self-tapping screws.

This Renogy device doesn’t rely on shunt-based measurements; instead, it communicates directly to the battery management system to obtain the battery bank status. So you get accurate battery tracking and prediction.

Besides an accurate SOC, it also reads out and displays other battery information such as Current, Voltage, Estimated Remaining Runtime, Capacity, and Number of Batteries.

It’s an easy-to-use device that only requires a push of a button to display all the battery bank information in the convenient display. You don’t need to configure the system or do any calibration; simply use it out-of-the-box.

When not in use, the device stays in shelf mode and wakes up immediately once installed and turned on.

It doesn’t have a built-in Bluetooth, but it’s compatible with Renogy’s Bluetooth module, making it a smart battery monitoring system for RV. It’s compatible with 12V supply voltage, which you get in most RVs. 

The backlight LCD screen is decent but not the brightest one out there. But it feels convenient with a simple power button and two front panels up/down menu buttons. 

This battery monitor works best with Renogy’s Smart Lithium Iron Phosphate Batteries, but you can use them with most lithium RV batteries. Like other Renogy products, this battery monitor comes with standard warranty support.

6. LNEX Portable Battery Monitor with Shunt

LNEX Portable Battery Monitor with Shunt

Highlighted Features:

  • Alarm and backlight flash option for high and low threshold voltages
  • Lightweight and portable
  • Built-in LCD backlight
  • Compatible with various types of batteries, including Lead-acid, Lithium-ion, and Lithium Iron Phosphate
  • Includes 26ft shielded cable and pure bass-made connectors, bolts, and nuts

Looking for a great little battery monitor for your RV? Check out the LNEX Portable Battery Monitor. It’s small in size but has a large list of features to add value to your RV.

LNEX is an easy-to-mount device with a transparent shunt holder and more cables than required!. 

This battery acts as a Coulometer (high-precision battery tester) to test and display multi parameters, including the SOC, current, voltage, remaining, current dissipation, and battery capacity. It has a voltage range of 10V-120V, and it’s compatible with all 12V and 24V RV batteries. The current measuring range is up to 500A.

It’s not just a monitor; in fact, you get a programmable audible alarm for high and low threshold voltages so that your battery stays safe. The voltage value and backlight will both flash simultaneously to alarm the users.

LNEX battery monitor includes a memory function to store the last tested data once the RV system shuts off. It claims 1% accuracy, and it seems to live up to the claims very well.  

The LCD is large and colorful. So you can easily read the parameters in light and dark conditions. When there’s no load or the current is in low capacity, the device goes to sleep mode, and the lights go off automatically.

LNEX doesn’t have BT communication and waterproof specification. It includes a user manual, but it isn’t the most comprehensive one. Regarding installation, you might feel the lack of mount holes or brackets. This LNEX product doesn’t include any information manufacturer’s warranty, you could still ask the seller, though.

7. Victron Energy SmartShunt 500 Amp Battery Monitor

Victron Energy SmartShunt 500 Amp Battery Monitor

Highlighted Features:

  • Bluetooth Communication
  • Smartphone application to display battery parameters
  • 500A/50mV shunt-based monitor
  • Includes VE. Direct Port as communication port
  • It comes with Shunt cables

Victron is a big name for RV batteries and maintenance kits. They have some excellent battery monitors, even a few smart ones, including this Smart Shunt Battery Monitor.

It stands out for its Bluetooth functionality that allows you to monitor your battery status in your smartphone. With the VictronConnect App, you can monitor different battery parameters such as SOC, Remaining Time, Historical Data, etc.

The app is the heart of this device, and you’ve to stay logged in to see your battery’s usage trend. There’s no separate display which limits the display option.

This 500A/50mV smart shunt is suitable for most 12V and 24V batteries of your RV. 

The installation is pretty simple, and it makes a great choice where you need less clutter and wiring. The shunt includes two red cables with fuses. If you don’t know how to install a shunt or battery monitor, you should consult a licensed professional.

It has additional VE. Direct Port like a few other Victron battery monitors. So you can monitor a second battery, add a temperature sensor, or do midpoint monitoring.

No buzzer or audible alarm included. The Bluetooth is weak and only works well at a short distance. The brief battery history gets deleted once you disconnect the device from the app. So it seems Victron has to improve these few things to make it the best battery monitor for RV. But the product comes with Victron’s convenient warranty support.

8. BMPro Trek3 RV Battery Monitor

BMPro Trek3 RV Battery Monitor

Highlighted Features:

  • Backlight LCD
  • Reads and displays multiple battery parameters
  • Display water tanks levels for up to 4 tanks and allows controlling water pumps up to 2
  • Works with BMPro BatteryPlus35 Series
  • Battery isolation option
  • Bluetooth connectivity with OddesseyLink

How about getting information on battery data and water tank levels on a single screen? Sounds smart, right? Trek3 RV Battery Monitor comes with this exclusive feature to make this monitoring kit a more efficient one.

Let’s start with its installation, which is fairly easy and convenient. It supports wall mount installation and includes two mounting options — Flush and Half-recessed. 

The backlight LCD is bright enough to display all battery data conveniently. It also works pretty well in the dark. Most importantly, you get a bunch of reading out of this screen.

These battery parameters include voltage, SOC, charging and discharging current, remaining time, battery power status, and auxiliary and solar currents. The monitor consists of a Battery Isolate Button that allows users to quickly isolate the unit from loads to protect it from unnecessary discharge.

It also shows the information on water tank levels, such as water pump status and a level mark for up to 4 water tanks.

The voltage ranges from 6V to 16V, and the monitored current capacity ranges from 50Ah to 600Ah. The monitor also comes with a visual alert to warn users about the low battery (battery reaches 11V).

You can make it a smart battery monitor by connecting it to the OdysseyLink103 and making it a part of the Odyssey System.  It’ll enable the SmartConnect Bluetooth sensor, and you can use the free Odyssey App on your smartphone to monitor your battery or control water pumps from a remote distance.

It doesn’t mention a waterproof rating, so it’s better to avoid placing it in wet conditions. The unit works with BMPro’s BatteryPlus35 BMS, which marks a compatibility issue. But if you go with the BMPro BMS, you’ll probably have a great overall experience! The convenient 2-year manufacturer’s warranty should also make you confident about the product.

9. UHUSE LCD Display DC Battery Monitor Meter 0-200V

UHUSE LCD Display DC Battery Monitor Meter 0-200V

Highlighted Features:

  • Shunt-based operation
  • Digital display with backlight
  • Displays 9 battery functions
  • High-precision chip control
  • Suitable for indoor use

We didn’t talk about measuring battery functions like impedance or internal resistance. But some serious camper folks want their battery monitor to do these measurements. 

So here we’ve got the UHUSE Battery Monitor with nine measurement functions, including impedance and resistance. Other regular functions include voltage, current, SOC, power consumption, estimated remaining time, and more.

This UHUSE is a shunt-based 12V Battery Tester and Monitor. You can choose from 50A, 200A, or 300A shunts. It can measure voltage ranging from 0-200V and current ranging from 0-300A. 

You can rely on all these readings as the unit has a high-precision chip control for reliable and efficient operation. The accuracy tolerance is around 1%, and you can test to see the claim.

It comes with a Push-on terminal design, allowing you to install it easily. You don’t even need screws to set it up in your RV.

The LCD has an HD display with a backlight and a 360°viewing angle. So you can have crystal clear visuals of all the reading regardless of day or night. It doesn’t have BT connectivity.

It’s not waterproof and suitable for indoor use only. Installation and programming need care, especially wiring and applied load should maintain the specification. The seller doesn’t include any warranty information, but you could still make a query to know about that.

10. Xantrex LinkPro Battery Monitor

Xantrex LinkPro Battery Monitor

Highlighted Features:

  • Display SOC, amps, and remaining time.
  • Additional communication port
  • Backlight LCD
  • Programmable alarm
  • Stores data in internal memory

If you’re looking for a battery monitor kit that tells you exactly what you need to optimize your battery, check out the Xantrex BMK. This small little kit brings tons of handy information right to your fingertips.

It’s a shunt-based monitor that works for batteries connected in both series or parallel. It doesn’t include many measurement functions, but you get the ones you require the most, including the State of Charge, current amps, and remaining time.

The accuracy of the measurements is highly reliable and can pass out any test. It’s very easy to use and configure as well.

The installation is quite a breeze; just make sure that the battery power flows through its shunt to sense the current flow properly. You even get a screwdriver in the package to easily hook up the wires. But you’ve to buy wires as the product doesn’t include that.

The LinkPro has been popularly used as an upgrade for Xantrex Link20, and people find the upgrade to be really worthy. It has an additional expansion/communication port for wider application.

The unit includes an internal memory function to store a range of events. There’s also an advanced programmable alarm option that can come in handy for low and high-voltage conditions.

You get a convenient backlight display for easy readouts. However, it’s not the brightest one out there and requires a push to light up. 

Regarding the warranty, you need to contact the seller to get information on its warranty policy.

How to Buy the Best RV Battery Monitor? 

Let us help you if you’re in a fix regarding how to choose the best RV battery monitor. We’ve figured out the factors you should consider while buying the health checker for your RV battery.

Find out more of these factors in detail below.

Accuracy

Accuracy is probably the most significant factor in an RV battery monitor system. Most battery monitors claim an accuracy of +/- 1%, within the standard tolerance level for battery monitors. 

To keep up to the accuracy, we recommend you choose a shunt-based monitor or one having a high-precision chip because these low-resistance components can take into account even the most negligible amount of current or voltage change.

RV Battery Monitor

A good battery monitor shouldn’t just claim for accuracy but also live up to it. It should display accurate reading all the time as successful battery optimization largely depends on it.

Ease of Installation & Use

Most battery monitors out there support wall mount installation allowing you to fix it inside the RV. Make sure the BM you choose has long wires to reach your chosen location. 

Some even include mounting bolts or brackets to make the mounting process easier. The instruction manual should also be convenient to get you done through the process.

However, there are some shunt-based monitors which you’ve to attach directly to the battery. In that case, you need to use your phone as the display, which will be connected through Bluetooth connectivity.

Multiple Parameters

You’ll want your battery monitor to include as many battery measurement functions as possible. 

The least expensive ones might only act as voltmeter ammeter devices where the most standard BMs have up to 9 readings, including the State of Charge, Power Consumption, Voltage, Charging and Discharging Current, Estimated Remaining Time, and so on.

RV Battery Monitor

So always go for an option that covers most of the battery parameters as it’ll help make better battery optimization.

Smart Connectivity

In this era of smart connectivity, you should go for a monitor with a Bluetooth feature. This will allow you to connect the BM to your phone and see all the details in it. 

Some of the smart battery monitors offer a smart mobile application that offers a convenient display showing a menu with all the battery readouts.

Display

The display is a crucial factor in choosing a good battery monitor. There are quite some features to check out in your BM display while buying. 

RV Battery Monitor

Firstly, it should be large enough to conveniently show all the battery parameters. It has to be an intuitive LCD with a backlight so that you can read the measurements both day and night.

Also, make sure it has a good viewing angle to help you see all the details at a glance.

Alarm or Warning

You should get an RV battery monitoring system with an alarm or visual warning for high and low threshold voltages. It’ll help you get an alert for your battery’s under or overcharge conditions.

The alarm could be audible or visual. By visual alarm, we mean you can see the indicator light blinking. This will protect your battery by making you charge it at the right time and by also extending its service life.

How to Install an RV Battery Monitor?

It’s quite easy to install the RV battery in typical conditions. Here we’ll be guiding you through how you can install an RV battery monitor in the easiest way possible.

How to Install an RV Battery Monitor

Things Needed to Get Started

Let’s take a look at things you need to get started with the installation. The battery monitor’s display unit, extension cable, current shunt (for shunt-based monitors), and instruction manual are all included.

You’ll also need a small wire with a fuse to attach the shunt to the battery’s positive terminal and a battery cable to attach the shunt to the battery’s negative terminal. 

Choose a Suitable Location to Run the Display Extension Cable

You’ve to choose a mounting display location where the given extension cable can reach. Run the display cable so that it goes from the shunt to inside the RV, where you’ll mount the display unit. 

You can easily remove the fuse and breaker panel to pass the wire to the battery bay.

Mount the Display Unit

You’ll need a 2 ⅛ inch hole to flush mount the battery display unit. Simply get behind the display to fix the mounting bracket and set it in the RV wall. If that’s not possible, you can fabricate a front-facing mounting plate and use it.

Install the Shunt

Now it’s time to install the shunt. You should have the battery cable attached to the ‘B’ end of the shunt, while the other end should be connected to the battery’s negative terminal. 

Attach all other load wires to the ‘P’ end of the shunt. Now plug the extension cable of your display unit into the shunt. Lastly, connect the small single wire to the green hole on the shunt and attach its other end to the battery’s positive terminal.

It’ll ensure the 12V connection to supply power to the display unit. At this point, you should have the display monitor up and running. 

Program the RV Battery Monitor

Now it’s time to program the amp-hour capacity of your RV. Before you start to program it in the display unit, make sure the battery bank of your RV is 100% charged. 

Now switch on the monitor screen. When it’s on, look for an ‘A or Ah’ key and press it until you see it in the right corner of the unit.

Next, you’ve to hold the set button for 3 seconds to set the accurate amp-hours reading. You can adjust the amp-hours reading using the left/right arrow keys from its default setting of 100 amp-hours. Once you finish, press the set button again. 

How to Install an RV Battery Monitor

Finally, press the ‘%’ button. When you see the symbol in the right corner, press the ‘%’ button again and hold it for 3 seconds. Now your battery should be reset to 100%. 

This finishes your installation process for the RV battery monitor. You can recheck the reading by pressing the set button. You can also check the number of incoming and outgoing amperes by pressing the +/- sign. 

Why Do You Need a Battery Monitor for Your RV? 

It won’t be wrong to call it an RV battery gauge instead of an RV battery monitor. Because a battery monitor tracks the energy level of your RV battery in the same way, a fuel gauge tracks the gasoline level of your car. 

It tells you different things about your battery that can help you make better power choices while also helping you with battery maintenance and battery life extension.

There are more detailed reasons why you need a battery monitor for your RV Camper. Let’s take a look at some of these here.

  • To know about multiple battery parameters such as the State of Charge, power consumption, voltage, estimated remaining time, temperature, and more
  • See both the real-time and historical battery data
  • Be informed when the battery reaches full charge
  • Get alarms for high and low threshold voltages
  • Optimize performance based on the information provided
  • Battery low warning
  • Smart communication such as Bluetooth, smart App option for easy monitoring

FAQs

Let’s answer some of your remaining questions regarding the best RV monitor.

1. What is a good RV battery monitor? 

A good RV battery monitor provides accurate battery parameters, convenient display, smart connectivity, ease of use & installation, and a good price.

2. What Can A Battery Monitor Measure?

A battery monitor generally measures the State of Charge, the flow of current, Voltage, Ampere-hours or amount of current, Estimated Remaining Runtime, and Temperature.

3. How do I read my RV battery monitor?

To read your RV battery monitor, you need to know the signs or letters indicating a particular battery parameter. The parameters are generally denoted as followings:

State of Charge = % (percentage of rated capacity), Flow of current = A, Voltage = V, Ampere-hours or amount of energy = Ah, Estimated Remaining Runtime = H or T, and Power = W

4. How does the Renogy battery monitor work?

Renogy is a shunt-based battery monitor that measures your RV battery’s real-time current draw and voltage. It then uses these measurements to calculate other parameters such as SOC, Power Consumption, Estimated Remaining Runtime, etc.

5. How do I monitor dual batteries?

You’ll need a battery monitor with a second battery input to monitor dual batteries such as your chassis and house batteries. There are quite a few battery monitors available with this feature.

6. How do you calibrate a battery monitor?

To calibrate a battery monitor, disconnect it to the external power source, discharge the battery naturally, then connect the device back to the power source, allowing it to charge until the battery is full and the status reaches 100%.

7. How do you wire a solar battery monitor?

To wire a solar battery monitor,  you can simply wire the shunt to either the positive or negative terminal of the battery. But it’s recommended that you wire the shunt on the negative terminal for battery monitoring. Also, keep it as close as possible to the battery. Another wire connecting the display screen should show all the battery status.

8. Does a shunt go on positive or negative?

A shunt can go or be wired on both the positive or negative terminals of a battery. However, it’s recommended to wire it to the negative terminal while monitoring the RV battery and getting the best results. 

Final Words

We’ve seen campers being casual with their battery maintenance. Some think the initial cost of an RV battery monitor to be high and unnecessary.

But when one pays the price of not having one by getting their battery to run out or damage unexpectedly, it’s only then they start valuing this small little unit.

We know you don’t belong to this group, and you’re someone who makes smart power choices for the RV battery. 

By buying any of the above, you can really do that!

You can choose the best RV battery monitor based on features like Bluetooth connectivity, high-precision measurements, convenient display, and ease of installation and use. 

Regarding our favorite one, there are quite a few. But we’ll like to go for Renogy and Victron BMs for their reliable performance backed by a solid reputation!