Battery Monitors
Defining the amount of energy available in a battery is a complex task since battery age, discharge current and temperature all influence the actual battery capacity. High performance measuring circuits, along with complex software algorithms, are used to exactly determine the remaining battery capacity.
A battery monitor can display voltage, charge and discharge current, consumed amphours, remaining battery capacity, temperature and the time remaining of your battery bank and display the voltage of an auxilliary battery.
A very important function is to provide an alarm if any particular parameter is not normal. for example battery temperature.
BMV series of battery monitors
Victron have a complete range of battery monitors. There are principally two base models, the BMW-700 Series and its variants and the BMV-712 Smart.
- BMV-700: Monitors one battery
- BMV-702: Monitors one main battery plus another (e.g starter battery). If you have only one battery bank you can choose instead to monitor midpoint battery bank voltage or battery temperature using the additional temperature sensor cable. The 702 can be upgraded to Bluetooth with the VE.Direct Bluetooth Smart dongle, but that means the VE.Direct port is no longer free.
- BMV-712 Smart: Has all the functionality of the 702 plus Bluetooth connectivity, leaving the VE.Direct port free to connect to other monitoring and management solutions. It also draws less current.
As the VE.Direct port is now free on the BMV-712 Smart you can connect it to other devices such as the Color Control GX or the Venus GX and even a Raspberry Pi – giving solutions for every budget and installation type.
In the BMV-700 Series, the standard colour is grey but black is also an option with the 702. There’s also an additional high voltage version in the series, the BMV-700HS.
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Best RV Battery Monitors in 2023 Reviews Buying Guide
As you would know, there are a lot of electrical appliances, devices, and accessories that are installed in your RV all of which rely on battery power for their operation. Because of this, it is highly important to ensure that your RV’s batteries are getting properly charged so that you can use all sorts of electronics while still being able to turn on the engine.
To ensure this, you can consider getting one of the best RV battery monitors explained down below which have been chosen based on these factors:
- Current Range: For ensuring that your RV’s battery or batteries are getting properly checked, you can consider checking their current output. Although, since different batteries will have different current outputs, it is highly important to have an RV battery monitor that offers a wide current range reading like 0 to 100 amps or 0 to 500 amps.
- Voltage Range: Other than the current range, you should also consider checking the voltage range of your RV battery monitor to ensure proper charge output from your batteries. Generally, you will find voltage ratings like 6.5 volts to 100 volts or 10 volts to 120 volts range options while buying an RV battery monitor.
- Bluetooth Connectivity: Even though almost all RV battery monitors have a display on the front for showing all the various readings, some of them may even include Bluetooth connectivity. With such RV battery monitors, you can check all the details of your RV batteries directly on your smartphone.
Even though these factors are quite important when it comes to buying an RV battery monitor, you should still consider a few other factors. This includes factors like their important features and options along with a complete “Buying Guide”. Thanks to information like this, you can easily buy the best RV battery monitors once you have made it to the end of this listicle.
Best RV Battery Monitors in 2023
Best RV Battery Monitors in 2023: Reviews
Victron Energy BMV-712 Battery Monitor
Victor Energy is quite a popular brand of energy and power-related products since most of its offerings include various handy features while being highly reliable for long-term usage.
The Victron Energy BMV-712 Smart RV battery monitor comes at the 1st position of this list since this is one of the most durable and reliable options out there. Not only that but this RV battery monitor also supports a pretty high current range of 0 to 500 amps which is always great to have. Although, its voltage range of 6.5 to 70 volts can be a bit limited.
Despite having such a small form factor, this RV battery monitor still manages to include a compact display at the front. And if that is not enough for you, you will be glad to know that this is a Smart battery monitor which includes Bluetooth connectivity and a companion smartphone app. Coming to one of the key features of this RV battery monitor, you will be glad to know that it includes a 5-year long warranty making it ideal for long-term usage.
Best Features:
- Offers a current range of 0 to 500 amps
- Supports a voltage range of 6.5 to 70 volts
- Includes Bluetooth connectivity
- Comes with a 5 year long warranty period
- Fairly compact RV battery monitor
- Perfect for long term usage
- Supports a companion smartphone app over Bluetooth
Renogy 500A Battery Monitor
Even though Renogy is a bit on the expensive side, its RV accessories and products can be a great option if you want a battery monitor made for heavy-duty usage.
Renogy’s 500A RV battery monitor comes at the 2nd position of this listicle as this RV battery monitor offers the highest ranges in terms of the readings that it can offer to the user. For starters, it features a current range of 0 to 500 amps. This is combined along with a pretty high voltage range of 10 to 120 volts which should be more than enough than what you will ever require.
While this RV battery monitor does not feature Bluetooth connectivity, you do get a pretty large screen size included with it for easily checking your readings. Talking about the readings, this battery monitor also shows you battery capacity and power consumption along with backlighting and data storage features. Because this RV battery monitor is meant for heavy-duty usage, it also includes a decent 3-year long warranty.
Best Features:
- Offers a current range of 0 to 500 amps
- Supports a voltage range of 10 to 120 volts
- Comes with a 3 year long warranty period
- Quite a large display with various functions
- Supports 4 types of different readings
- Perfect for heavy-duty usage
bayite DC 6.5-100V Battery Monitor
Bayite is one of the newest brands out there that still offers one of the most popular RV battery monitors as it makes for a great option for those who are on a tight budget.
This Bayite RV battery monitor comes at the 3rd position of this article because it is the cheapest option stated here in this list. And even at its given price tag, you get a decent current reading range of 0 to 100 amps out of it. You also get a pretty decent voltage reading range of 6.5 to 100 volts with this RV battery monitor making it highly versatile.
Speaking of versatility, it happens to be a 4 in 1 meter that can also show you active power usage and energy rating as well. Unfortunately, the display size of this budget-friendly RV battery monitor is a bit limited which is to be expected at the given price. Although, what you will not expect is that included 1-year long warranty.
Best Features:
- Offers a current range of 0 to 100 amps
- Supports a voltage range of 6.5 to 100 volts
- Comes with a 1 year long warranty period
- Entry-level RV battery monitor for budget buyers
- Decent current and voltage range
- Shows multiple battery readings
INNOVA 3721 Battery Monitor
Innova is a fairly new brand of battery-related accessories and tools that you can keep in mind if you want something unique and compact in terms of its form factor and function.
The Innova 3721 RV battery monitor is among one of the most unique battery monitor models available out there. This is primarily due to the reason that instead of connecting directly to the batteries of your RV, it connects to the 12-volt power sockets present inside your RV. As a result, it has a fixed voltage reading value of 12 volts. Unfortunately, it does not show you the current value which can be quite an issue for many.
Although, checking the battery capacity and voltage is still pretty easy thanks to its LCD display and colored LED indicator lights. Even with its compact size, it has an adjustable head allowing you to check all the required details. Innova includes a decent 1-year long warranty with this RV battery monitor which is always great to have.
Best Features:
- Supports a voltage range of around 12 volts
- Plugs into 12-volt cigarette lighter power point
- Comes with a 1 year long warranty period
- Unique and compact form factor
- Includes LCD display and colored LEDs
- Decently affordable RV battery monitor
MICTUNING DC 6.5-100V Battery Monitor
Mictuning and its RV accessories like battery monitors stated here can be another great choice for all those of you who are looking for entry-level options.
This Mictuning RV battery monitor is among the cheapest options available out there making it great for buyers on a budget. Even at its given price tag, you get a decent current range of 0 to 100 amps. It is combined along with a similarly decent and suitable voltage range of 6.5 to 100 volts in terms of the readings that you can get from it.
Since this is a 4 in 1 multimeter, it can also show you the power and energy readings at the same time. Despite having such a small display, this RV battery monitor also supports an alarm function, a backlighting function, and even a data storage option making it highly versatile. You also get a 1-year long warranty with this affordable RV battery monitor making it a great value for money pick for many.
Best Features:
- Offers a current range of 0 to 100 amps
- Supports a voltage range of 6.5 to 100 volts
- Comes with a 1 year long warranty period
- 4 in 1 multimeter for high versatility
- Affordable RV battery monitor for budget buyers
- Supports data storage and alarm functions
MNJ Multifunction Battery Monitor
MNJ Motor makes a wide range of products, tools, and accessories related to all sorts of automobiles including RVs for which it makes a few handy RV battery monitors.
The MNJ Motor RV battery monitor might be the perfect option for you if you want a high voltage readings range for testing large parallel battery setups. To be exact, this RV battery monitor supports the highest voltage rating of 0 to 200 volts in this listicle. This is combined along with a fairly high current range of 0 to 100 amps which is quite good especially for the given price tag.
Because this is a fairly affordable RV battery monitor, its given compact display is to be expected. However, it still features backlighting, 9 in 1 reading functions, and much more making it a highly versatile option. Although, this RV battery does not come with any warranty which can be a big issue for a lot of buyers.
Best Features:
- Offers a current range of 0 to 100 amps
- Supports a voltage range of 0 to 200 volts
- 9 in 1 measurement and reading options
- Excellent voltage reading range
- High value for money RV battery monitor
- Supports backlighting function for the display
ANCEL BM300 Battery Monitor
While Ancel might be a new brand of products like RV battery monitors made for use in your vehicles and RV’s, it can certainly be a great option if you want something Smart and feature-rich.
Ancel BM300’s RV battery monitor is most likely the smartest and most versatile battery option stated in this listicle. This is due to the reason that not only does it come with Bluetooth connectivity, but it even supports a highly functional smartphone app. Unfortunately, this RV battery monitor only works with 12-volt batteries and does not have a voltage reading range.
But the biggest issue with this RV battery monitor is that it does not show you the current output offered by the batteries that you are testing. Since this is a Smart RV battery monitor, it does not include a display resulting in a lightweight and compact form factor. As you will be using a smartphone app for using this Rv battery monitor, it can even store the readings for the last 31 days. Just like most other RV battery monitors, this Ancel one also includes a decent 1-year long warranty for your peace of mind.
Best Features:
- Supports a voltage reading of 12 volts
- Includes Bluetooth connectivity
- Comes with a 1 year long warranty period
- Highly compact and lightweight form factor
- Quite a versatile and advanced smartphone app
- Stores readings and data for the last 31 days
AiLi 500A Battery Monitor
Those of you who do not have any budget restrictions can also consider Aili and its RV battery monitor models including the one stated here since they are great for heavy-duty usage.
Aili’s 500A RV battery monitor is one of the best options available out there when it comes to checking the readings of large battery setups with ease. Taking a look at its current range for readings, it can show you a reading from 0 to 500 amps. Similarly, the voltage range of 10 to 120 volts supported by this RV battery monitor is also quite high which is always great to have.
Thanks to the large backlit display used by this RV battery monitor, you can easily check things like the state of charge, time remaining, power consumption, and much more. A unique feature of this RV battery monitor is that it also supports programmable alarms and buzzers. Similar to most other RV battery monitors, this premium unit also features a 1-year long warranty for reliability.
Best Features:
- Offers a current range of 0 to 500 amps
- Supports a voltage range of 10 to 120 volts
- Comes with a 5 year long warranty period
- Great for using with larger battery configurations
- Uses a large display with multiple readings and features
- Supports an alarm function for ease of use
Buying Guide for the Best RV Battery Monitors
Whether you are using your RV’s engine to charge the batteries or an external solar panel system, it is highly important to check if the batteries are getting properly charged so that you can rely on them in all situations. One easy way to get an idea of the charge offered by your RV batteries is to get something like the RV battery monitors stated up above.
With all these various RV battery monitors, we have also stated their important information like features and factors that can be handy to pick the right RV battery monitor. Although, if you are still confused, make sure to check out this detailed buying guide for the best RV battery monitors:
Current Range
When talking about batteries, it is quite important to check the current output for ensuring that a given battery setup can power all of your required electronic appliances and devices without running power limits.
Thankfully, most RV battery monitors will allow you to check the current output of your batteries thanks to their wide current ranges. Even though entry-level models may only read 0 to 100 amps of current output, higher-end models can even check 0 to 500 amps of current output which is quite higher than most others.
Voltage Range
Even if your RV’s batteries are offering a high current output, they might not be compatible with your electronic devices if the voltage output is not current. As a result, RV battery monitors also support checking the voltage output of your batteries.
Similar to the current range, this voltage reading is also available in a range for high versatility for different parallel battery setups. Some of the common voltage range ratings include 6.5 to 70 volts, 6.5 to 100 volts, 10 to 120 volts, and even 0 to 200 volts in some cases. If you want a single RV battery monitor for checking the voltage output of various kinds of batteries, then you should go with one with a high voltage and current range for its readings.
Display
Those of you who have an RV battery monitor with high current and voltage measuring ranges would want to check the output of their RV’s batteries right away. As you would expect from any other monitor, these battery monitors also allow you to do the same from their inbuilt displays. Although, not all RV battery monitors have the same displays which is something that is highly important to check. Other than the display size, you can also find differences like backlighting for the display, information layout, display type, and a few others.
Bluetooth Connectivity
While checking the information regarding your RV’s batteries is quite easy using the display of your RV battery monitor, it might not be the most versatile option for everyone. Because of this, a lot of RV battery monitors also offer inbuilt Bluetooth connectivity.
With such RV battery monitors, you can simply use Bluetooth and a companion app right on your smartphone for easily checking all the battery details regarding your RV directly on your mobile phone. Not only is this highly versatile, but you can also get much more detail than on the small displays used by most RV battery monitors.
Readings and Functions
Thanks to the Bluetooth connectivity and large displays offered by various RV battery monitors available out there, these battery monitors offer much more than just checking the current and voltage output of your batteries. Most RV battery monitors are more or less multimeters with 4 or more functions. This can include readings and functions like checking voltage, current, power, energy, battery capacity, and much more. Any given RV battery monitor that supports multiple readings is going to be highly versatile for using in all kinds of scenarios.
Installation
Once you have chosen the ideal RV battery monitors designed for your RV and its battery setup, you would want to start using it right away. But before that, you need to install your RV battery monitor in your RV and connect it to the batteries to take the readings properly. For the same, you will find two types of RV battery monitors that differ in terms of their installation.
Starting with the easier installation, a few RV battery monitors can be directly connected to any of the various 12-volt car charger outlets offered inside your RV. Although, if you want to monitor larger battery setups in your RV, then it is advised to go with battery monitors that connect directly to the battery using shunts, wires, clamps, and other similar included accessories.
Warranty
After you have selected the right RV battery monitor for your RV and installed it inside, you would want it to stay functional for as long as possible so that you do not have to repeat the installation again and again.
Because of this, it is always a great idea to check the warranty offered by your RV battery monitor for ensuring that it can last for a long time. While most RV battery monitors are backed by a 1-year long warranty, some more reliable options may also include a 3-year long warranty or a 5-year long warranty for your peace of mind.
Conclusion
Since an RV is essentially a home on wheels, it has a lot of electronics and home appliances inside it. Along with your RV’s engine, all these devices and appliances also rely on your RV’s battery for power.
Because of this, it is highly recommended to get one of the best RV battery monitors explained up above. All the different RV battery monitors present earlier in this listicle also have their details like features and factors along with a comprehensive buying guide. And based on all these various details, here are our ideal picks for the best battery monitors:
- If you are on a tight budget and looking for something affordable, then you can go with theBayite RV battery monitor. Even at its extremely budget-friendly price tag, you get a decent current range of 0 to 100 amps along with a voltage range of 6.5 to 100 volts. While it is a bit on the smaller side, its LCD display offers 4 types of different readings for high versatility.
- In comparison to most other options, the Victron Energy BMV-712 RV battery monitor is highly reliable thanks to its 5-year long warranty. Another great thing about this battery monitor is that it includes Bluetooth connectivity along with a smartphone for Smart readings including its current range of 0 to 500 amps and a voltage range of 6.5 to 70 volts.
- The Renogy RV battery monitorcan be a great option if you are going to install a lot of batteries in parallel connection inside your RV. This is due to the reason that you get a very high voltage range of 10 to 120 volts along with an equally high current range of 0 to 500 amps without having a premium price tag for the same. Renogy also includes a decently long 3-year long warranty making it ideal for long-term usage.
BM-1 LI Clipper BM-1 LI Battery Monitor f/12V Lithium 81207
The BM-1 battery monitor is designed to monitor performance of 12 volt lead acid battery systems, including AGM and GEL types with capacities of up to 600 Amp hours. It is supplied complete with a precision 100 AMP shunt and a prefabricated cable assembly to enable simple DIY installation. The unit continuously monitors voltage, current (charge or discharge), number of amp/hours (charge or discharge), the batteries state of charge and the time to charge or discharge. It also monitors the voltage of the engine strat battery. This information leads to more efficient use of the battery, which can enhance battery life and reduce the risk of failure.
Specifications:
- Supply Voltage
- BM-1 12V 8 – 16 Volts DC
- BM-1 24V 16 – 32 Volts DC
- Supply current 1.5 milliamps
- Battery capacities 5 – 600 AMP Hour
- Load current 100 AMPS Maximum
- Charge current 100 AMPS Maximum
- Shunt Standard 50 millivolt @ 100 AMP
Cables Supplied:
- 100 AMP shunt link to M8 Ring terminal.5 Metre from display unit to battery – fused and fitted with ring terminals for shunt, fuse holder and M8 ring terminal to battery.
- Display unit
- Standard 110mm square Clipper case. High contrast LCD, backlit for night viewing.Minimum voltage visual alarm
- Simple operation – 4 keys to select backlight, Volt/Amp/State of Charge screen,AMP hours or Time to run.
How Does It Work?
A simple and intuitive display shows the service battery voltage, charge/discharge current, state of charge, and time to charge/discharge. The instrument also warns the user when the charge level is too low so that load can be shed or charging commenced to protect the battery. A resettable Amp Hour counter is provided for checking the efficiency of the charging system or keeping a track of power consumption and a second input lets the user monitor the voltage of the starter battery. The simple display format does not mean the internal software is unsophisticated. In fact two separate algorithms are used. One based on integrating amp hours over the charge and discharge cycle, the second based on an adaptive internal mathematical battery model.
A unique feature of the BM1 is its ability to use information from both algorithms, during the charge/discharge cycles, to continually update its performance. This means that, unlike many other systems that rely solely on amp hour integration, the NASA BM1 never needs to be re-synchronised with the battery. The algorithm includes Peukert’s equation to ensure accuracy over a wide range of load currents.
The BM1 does all this whist consuming a meagre one and a half milliamps. It is a true battery monitor, easy to install and excellent value for money.
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The Express shopping cart default rate is AUD85 for the first kilo. Additional freight charges over one kilo and taxes will automatically and separately be billed to your credit card. You will receive a receipt for the freight.
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Some bulky items may be classified as oversize regardless of their weight and have a longer transit time.
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We sell this part by the manufacturer’s part number only. These products are a special order from the USAmeaning there are no returns, no exchanges and no refunds possible. The sale is final.
include Australian GST, but may be subject to further customs fees or charges if the order is over AUD1000. Manufacturer’s warranty applies. The warranty is in the box. If a product is dead on arrival, we will replace it. Where possible warranty DIY spare parts will be provided. Marine Direct Australia will contribute 50 towards your return freight charges to USA within one year of order if there is a warranty issue.
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Where a brand has an established distributor in Australia, we will decline to sell it. Most such brands and products have been removed from our American listings. Some items shown within this category are intended only for the American marketplace and may not be compliant with Australian Standards and in which case we cannot sell them to you and/or will refund you.
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Welcome to our website. If you continue to browse and use this website, you are agreeing to comply with and be bound by the following terms and conditions of use, which together with our privacy policy govern MarineDirect’s relationship with you in relation to this website. If you disagree with any part of these terms and conditions, please do not use our website.
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This privacy policy sets out how we uses and protects any information that you give us when you use this website.
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Renogy Battery Monitor Review
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Off-grid power systems can be complex. Off-grid power systems typically have multiple inputs to charge your batteries – including solar, 120V AC, or DC. Your power system also has various outputs – such as inverters, lighting, refrigeration, and more. Away from home, you rely on your power system to keep you comfortable and safe. But it’s often difficult to tell what’s really going on in our systems. The Renogy 500A Battery Monitor is built to solve this problem.
The Renogy Battery Monitor is a small rectangular display that when installed with its included battery shunt, gives you precise readings on your battery usage and current capacity. Rated at 500 Amps, it’s a useful addition to battery-based power systems of all sizes.
Our Verdict:
We’ve really grown to love Renogy’s products. They are well-designed, reliable, and affordable. The Renogy 500A Battery Monitor is no exception. This little screen lets you know exactly what’s going on in your power system for under 100. Add Renogy’s BT-1 Bluetooth adapter and you can view your power system’s status in real-time on your phone.
Specifications:
- Accurate within 1%
- High and Low capacity alarm functions
- Compatible with Lead Acid, AGM, Gel, LiFePO4, Lithium-ion, and Nickel-metal hybrid batteries
- Works with systems from 10V to 120V
- Customizable battery size and voltage shut-off
- Backlit display
- Weight: 2.6 oz
- Monitor Size: 3.9in x 2.4in x 0.7in
How it Works:
The Renogy better monitor comes with a shunt – a low-ohm resistor used to measure current. You install this shunt between the negative terminal of your battery and the negative side of your power system. Once the shunt is installed, a small wire is connected between the shunt and the battery monitor. As your power system’s current flows (both in and out) through this shunt, the display on the battery monitor shows you how much power is being consumed (going out of the batteries) vs how much power is being put back in your batteries through charging sources. At a quick glance, the Renogy battery monitor displays your net power consumption. For example, if you are generating 40 watts of power from a solar panel, but have 60 watts of lights on at the same time, you are using 20w of your battery’s capacity.
The battery monitor “monitors” your net power flow at all times and calculates your net power flow against your battery size. Using this internal calculation, the battery monitor also displays your current battery percentage. Basically, the Renogy Battery Monitor shows you your net power flow at any given moment AND keeps track to let you know the current level of your battery.
Why It’s Awesome
Knowing how much power you’re really using is important to ensure your batteries last. For example, if you have a 100 Amp Hour battery and use 50Ah of power per day, your system isn’t going to last through a 5-day RV trip. Knowing how much each electric device in your van, RV, or boat allows you to be informed in your decisions of what devices to use and for how long.
As an example, we recently installed a Renogy Battery Monitor in a 46ft sailboat. We were experiencing battery problems but struggled to diagnose the cause. With the Renogy Battery Monitor, we discovered that the LED strip lighting in the boat that we thought was energy efficient actually uses 5x more power than the simple overhead lights we’d been avoiding.
Battery Monitors like the Renogy Battery Monitor have been around for a long time, but they have traditionally been in the 200 – 300 range. At under 100, Renogy’s monitor lowers the barrier of entry to closely monitor smaller power systems and large systems alike.
Add the optional BT-1 Bluetooth adapter and you can see your real-time power usage right on your phone using Renogy’s DC Home app. Curious to know how much solar you’re currently generating? It’s just a short tap away.
How We Use The Renogy Battery Monitor
We have one in our Outward Overland Trailer to monitor our 200Ah battery bank with 180 watts of solar panels. In the trailer, we use the battery monitor to test the true power usage of any new devices we plug in, charge, or use as a part of our overland setup. Measuring power usage is as simple as turning everything else off to get a zero power reading on the battery monitor. We then plug in and turn on the device and the monitor lets us know how many watts it uses.
Our trailer batteries are of the traditional flooded lead-acid variety. To maintain their health they are not supposed to be discharged more than 50% of their total capacity. The Renogy Battery Monitor lets us know when we’re reaching our batteries’ 50% discharge limit even when it is still powering devices. With the Renogy battery Monitor, we fell fully in control of our battery system while camping off-grid.
Our Favorite Features:
- The low cost. At 62 at the time of writing this should be a no-brainer addition to any van, boat, or RV that needs better battery management
- The clear battery percentage. A lot of battery monitors show you the current voltage of the system. These types of monitors require you to guess or do complicated math to determine what level your batteries are currently at. For the Renogy Battery Monitor, the current battery capacity is primary. It lets you know exactly where you stand including battery percentage, remaining Amp Hours, a visual battery icon, and the time remaining until a full charge or discharge.
- It’s simple and easy to install. The installation of the shunt requires you to do a bit of homework to make sure the monitor is accurate. Make sure that all of your batteries’ charging and discharging flow through the shunt. We recommend picking up a negative bus bar to make sure all of your negative wires are wired behind the shunt if you have a multiple battery bank. With the bus bar, connecting the shunt between the battery and the bus bar ensures all charging and discharging of your system is ready by the battery monitor.