A Bluetooth battery monitor makes it easier to check voltage, charging behavior, and battery health from your phone instead of relying on guesswork or a basic dash display.
We selected 10 Bluetooth battery monitors for different needs, from quick 12V automotive testing to permanent shunt-based monitoring for RV, marine, and solar systems.
Best 10 Bluetooth Battery Monitors Picks for 2026
Best 12V Bluetooth Monitor
- 12V lead-acid compatibility
- Cranking and charging tests
- iOS and Android app
Best For: Vehicle, RV, boat, and 12V solar battery monitoring
Best Multi-Voltage Bluetooth Monitor
- Supports 6V, 12V, and 24V
- Stores 72 days of history
- Monitor up to four batteries
Best For: Mixed-voltage vehicles and multi-battery monitoring
Best Bluetooth Battery Tracker
- Supports lithium, AGM, and lead-acid
- 72-day history with data export
- Custom alerts and four-vehicle app support
Best For: Multi-vehicle battery tracking and maintenance history
Best Overall
Victron Energy SmartShunt 300A
- Detailed app-based battery insights
- Precision shunt measurement
- Victron system integration
Best For: Advanced battery monitoring and Victron setups
Best for 12V Vehicles
BM2/BM3 Bluetooth Battery Tester
- Monitors 12V automotive batteries
- Reports voltage and cranking data
- Supports Android and iOS apps
Best For: Routine vehicle battery checks
Best Weather-Resistant Pick
- IP65 water- and dust-resistant design
- 6.5–70V, 300A monitoring range
- Detailed VictronConnect reporting
Best For: Protected installations and Victron systems
Best All-Around Automotive Monitor
- Cranking and charging-system tests
- 70-day data history with alerts
- IP67 protection and four-device monitoring
Best For: Drivers managing 12V cars, RVs, boats, or multiple vehicles
Best for Multi-Voltage Power Systems
- Works with 8–120V battery systems
- Tracks SOC, power, current, and voltage
- Custom alarms and historical performance data
Best For: RV, marine, solar, and home-backup battery installations
Best for Multiple Batteries
- Monitors up to six batteries at once
- Supports 3–60V car and battery systems
- Adds temperature, cranking, and charging tests
Best For: Users managing multiple vehicles, RVs, boats, or battery banks
Best 12V Bluetooth Monitor – BM2 Battery Tester
The BM2 is a practical choice among bluetooth battery monitors for people who want 12-volt battery readings through a phone. Its app provides voltage, charging, cranking, and starting-system information, while the low-voltage alarm can alert you when your phone comes within Bluetooth range.
Best For: Cars, motorcycles, RVs, boats, trucks, and 12V solar systems.
Pros:
- Supports 12V lead-acid batteries across several vehicle and solar applications.
- Tests voltage, charging performance, cranking power, and engine starting status.
- Includes iOS and Android app support with a 10-meter Bluetooth range.
Cons:
- Designed for 12V systems rather than 6V or 24V batteries.
- Low-voltage alerts require the phone to be within Bluetooth range.
This is a straightforward 12V option for monitoring conventional lead-acid batteries, especially if you want basic battery and starting-system diagnostics without a built-in display.
Best Advanced Bluetooth Monitor – Victron BMV-712 Smart
The Victron BMV-712 Smart is one of the more comprehensive bluetooth battery monitors for battery systems from 6.5 to 70 VDC. It combines a shunt-based monitor, on-device display, Bluetooth connectivity, historical charts, and configurable auxiliary measurement options.
Best For: Advanced battery-system monitoring where state of charge, current, energy use, and historical data matter.
Pros:
- Tracks state of charge, voltage, current, energy, and remaining time.
- Bluetooth access works with smartphones, tablets, and other compatible devices.
- Additional input can measure temperature, midpoint voltage, or a second battery.
- Programmable relay can control other equipment.
Cons:
- Installation can be hazardous and should follow applicable electrical codes.
- Advanced installation may require a licensed professional.
- Remote VRM monitoring requires a GX device and separately sold VE.Direct cable.
Choose this model when you need detailed battery-system data rather than simple voltage checks. Its display and configurable inputs make it particularly suited to more involved installations.
Best Multi-Voltage Bluetooth Monitor – ANCEL BM300 Pro
The ANCEL BM300 Pro is a versatile pick among bluetooth battery monitors because it supports 6V, 12V, and 24V systems. Its app displays voltage, estimated state of charge, temperature, and stored history, while additional units can be added to monitor up to four batteries from one phone.
Best For: Users managing different vehicle voltages or multiple batteries and wanting long-term app-based records.
Pros:
- Supports 6V, 12V, and 24V battery systems.
- Stores up to 72 days of history while disconnected.
- Up to four monitors can be viewed in one app.
- IP67 housing and protective circuitry support long-term installation.
Cons:
- This package includes only one monitor; additional batteries require additional units.
- It does not offer Wi-Fi, cellular, or unlimited-distance monitoring.
- Cranking and charging tests are not supported on 6V systems.
The BM300 Pro is a strong fit for mixed-voltage setups and users who value historical graphs. Keep in mind that alerts and live readings depend on the phone being within Bluetooth range.
Best Bluetooth Battery Tracker – Antigravity AG-BTR-3
The Antigravity AG-BTR-3 focuses on convenient phone-based tracking for 6V, 12V, and 24V batteries. Among bluetooth battery monitors, it stands out for supporting lithium, AGM, and lead-acid batteries while recording voltage, cranking, and charging data with customizable alerts.
Best For: Vehicle owners who want battery alerts, history, and support for multiple battery chemistries.
Pros:
- Works with 6V, 12V, and 24V lithium, AGM, and lead-acid batteries.
- Logs voltage, cranking performance, and charging-system data.
- Provides 72-day graphical history and spreadsheet data export.
- App can monitor up to four vehicles and show last parked location.
Cons:
- Live monitoring and alerts rely on Bluetooth phone connectivity.
- The supplied notes do not indicate cellular or Wi-Fi remote monitoring.
This is a good choice for tracking several compatible vehicles and reviewing battery trends over time. Its broad battery compatibility and exportable records are useful for routine maintenance and fleet-style tracking.
Best Overall – Victron Energy SmartShunt 300A
For detailed Bluetooth battery monitors, the Victron Energy SmartShunt 300A stands out for its precise shunt-based tracking and broad system integration. Its VictronConnect app displays battery data such as state of charge, voltage, current, amp hours, charge cycles, and time remaining.
Best For: Users who want detailed battery analytics and integration with other Victron devices.
Pros:
- Provides extensive battery data through the VictronConnect app.
- Uses precision shunt technology to track current, voltage, and state of charge.
- Supports VE.Smart Networking, VRM, and DVCC integrations.
- Auxiliary connection supports additional monitoring or temperature-sensor applications.
Cons:
- Not water resistant according to the supplied specifications.
- May be more feature-rich than needed for basic voltage monitoring.
This is a strong choice for installations where accurate battery history and Victron ecosystem support matter more than a simple voltage readout.
Best for 12V Vehicles – BM2/BM3 Bluetooth Battery Tester
For drivers comparing Bluetooth battery monitors, this BM2/BM3 tester focuses on 12V automotive batteries and communicates with Android or iOS devices over Bluetooth 4.0. The app reports voltage, charge, cranking power, battery health, and engine-starting activity.
Best For: Vehicle owners who want app-based monitoring for 12V batteries.
Pros:
- Compatible with 12V vehicle batteries and a stated 6–20V test range.
- Works with Android and iOS devices.
- Can send battery-status notifications when the phone enters Bluetooth range.
- BM3 can monitor up to four 12V batteries simultaneously, while BM2 monitors one.
Cons:
- The BM3 app is noted as not free.
- Designed for 12V automotive batteries rather than broader battery-system monitoring.
- Its measurements depend on using the companion app.
This compact tester is a practical pick for checking vehicle battery condition, charging, and cranking performance from a smartphone.
Best Weather-Resistant Pick – Victron SmartShunt IP65
Victron Energy SmartShunt IP65 Battery Monitor (Bluetooth) - Victron Smart Shunt - 6.5V-70V, 300 amp
Check Price On AmazonThe Victron SmartShunt IP65 is one of the more versatile Bluetooth battery monitors for installations that need added protection from water and dust. It combines detailed VictronConnect app reporting with 6.5–70V operation, 300A capacity, and wireless integration with compatible Victron equipment.
Best For: Battery systems needing protected installation and advanced Victron monitoring features.
Pros:
- Water- and dust-resistant IP65 design.
- Supports a wide 6.5–70V range and 300A rating.
- Tracks state of charge, voltage, current, amp hours, cycles, and time remaining.
- Supports VE.Smart Networking, VRM, DVCC, and auxiliary monitoring applications.
Cons:
- Its advanced features may be unnecessary for simple battery-voltage checks.
- Requires installation into the battery system rather than operating as a handheld tester.
Choose this model when environmental protection and detailed system-level battery data are priorities, especially within a Victron setup.
Best All-Around Automotive Monitor – ANCEL BM200
The ANCEL BM200 is a practical choice among bluetooth battery monitors for drivers who want more than basic voltage readings. It supports 12V lead-acid and lithium batteries, adds cranking and charging tests, and records battery data through an iOS- or Android-compatible app.
Best For: Car, truck, motorcycle, RV, and boat owners who want ongoing battery monitoring, vehicle location features, and historical data.
Pros:
- Tests voltage, cranking performance, and charging-system operation.
- Records readings every two minutes and stores up to 70 days of history.
- Monitors up to four devices and sends abnormal-voltage alerts.
- IP67 waterproof housing with reverse-polarity and short-circuit protection.
Cons:
- Limited to 12V battery systems.
- Vehicle location features require GPS permission.
- For more stable readings, installation is recommended after the vehicle has been off for two hours.
The BM200 stands out for combining battery diagnostics, trip records, alerts, and vehicle-management features in one compact monitor. Its 15–30-foot Bluetooth range and multi-device support make it especially useful for drivers managing several vehicles.
Best for Multi-Voltage Power Systems – LiTime 500A Smart Shunt
The LiTime 500A Smart Shunt is one of the more flexible bluetooth battery monitors for RV, marine, and home-backup setups. Its app tracks current, voltage, power, and state of charge across battery systems from 8V to 120V.
Best For: Users who need detailed monitoring and alerts for lithium, LiFePO4, AGM, flooded, or gel batteries in multi-voltage systems.
Pros:
- Supports 8–120V systems, including 12V, 24V, 36V, and 48V batteries.
- Tracks charge and discharge current, voltage, power, and state of charge.
- Offers adjustable alarms for capacity, temperature, voltage, and current issues.
- Provides historical discharge capacity, cycle, and voltage data.
Cons:
- Its shunt-based design is better suited to installed battery systems than quick automotive checks.
- The supplied notes do not specify the app name or a temperature-sensor installation method.
- It carries a 1-year warranty.
Choose the LiTime when system-wide battery data matters more than simple voltage testing. Its broad voltage range, customizable alarms, and historical reporting make it a strong fit for larger power installations.
Best for Multiple Batteries – KONNWEI BK400
The KONNWEI BK400 is a compact option among bluetooth battery monitors, combining real-time voltage and temperature readings with cranking and charging tests. Its 3–60V range covers common 12V, 24V, and 48V applications, while the app can monitor up to six batteries.
Best For: Owners of multiple vehicles or battery systems, including cars, RVs, boats, golf carts, solar setups, and LiFePO4 applications.
Pros:
- Monitors up to six batteries through the BK400 app.
- Supports 3–60V systems and multiple battery chemistries.
- Provides cranking, charging, voltage-history, and temperature information.
- Includes reverse-polarity, short-circuit, and circuit-breaker protection.
Cons:
- The supplied notes describe a corded connection rather than a fully wireless power source.
- Its maximum operating range is 60V, so it is not intended for higher-voltage systems.
- Vehicle-location information shows the last known location and distance, not necessarily live tracking.
The BK400 is particularly appealing when one app needs to oversee several batteries. Its broad compatibility, temperature monitoring, and engine-start testing offer useful detail without requiring a larger diagnostic device.
How We Picked the Best Bluetooth Battery Monitors
We compared these monitors by supported voltage range, current capacity, measurement method, app connectivity, installation requirements, alarm features, and intended use. The list includes plug-in automotive testers as well as shunt-based monitors that measure the current entering and leaving a battery bank.
We also considered compatibility with common lead-acid, AGM, gel, lithium, and LiFePO4 setups. A voltage-only tester can be useful for troubleshooting, but a shunt monitor generally provides a more complete view of remaining capacity when installed correctly.
Quick Comparison
| Best For | Recommended Type | What to Look For |
|---|---|---|
| Routine car checks | 12V plug-in tester | Voltage, cranking, charging, and low-voltage tests |
| Multiple vehicle systems | Multi-voltage tester | 6V, 12V, 24V, or wider compatibility |
| RV and marine battery banks | Shunt-based monitor | Current measurement, state-of-charge tracking, and Bluetooth history |
| High-current lithium systems | Heavy-duty smart shunt | Suitable amp rating, secure terminals, and app configuration |
Key Buying Factors for Bluetooth Battery Monitors
Voltage and Battery Compatibility
Confirm that the monitor supports your system voltage. A 12V automotive model is not automatically suitable for a 24V truck, 48V solar bank, or a wide-voltage lithium installation. Check whether the manufacturer specifies compatibility with your battery chemistry.
Voltage Tester or Shunt Monitor
Voltage testers are simple and usually install quickly, making them practical for cars and occasional diagnostics. Shunt monitors are installed in the battery negative circuit and track energy flow, making them better for measuring amp-hours and estimating state of charge in RV, boat, and off-grid systems.
Current Rating and Installation
For a shunt, choose an amp rating above the maximum continuous and peak current your system can draw. Follow the wiring diagram carefully: loads and chargers typically need to connect on the monitored side of the shunt so the readings remain accurate.
App Range, Alarms, and Data
Bluetooth range varies with the vehicle or battery enclosure. Look for an app with useful voltage thresholds, charging and cranking information, historical data, and clear alerts. Consider whether you need local Bluetooth access only or remote monitoring through a separate gateway.
Who Should Buy Which Bluetooth Battery Monitors?
Choose a compact automotive tester if you mainly want to diagnose a car battery, alternator, or starting problem. Pick a multi-voltage model if you maintain several vehicles or equipment types. For an RV, boat, camper, or solar battery bank, a Victron, LiTime, or comparable smart shunt is usually the better choice because it measures actual current flow and supports capacity tracking.
Before buying, verify the battery voltage, chemistry, maximum current, terminal size, app requirements, and available installation space. The best Bluetooth Battery Monitors are the ones that match both your electrical system and the level of detail you need.