A battery monitor is one of the most important accessories you can add to any 12V system. Whether you're running a motorhome, boat, solar setup, or 4WD with an auxiliary battery, a monitor gives you real-time visibility over your battery's voltage, state of charge, and overall health – so you're never caught off guard by a flat battery.
We stock a range of 12V battery monitors and gauges suited to AGM, gel, and lithium battery systems, from simple voltage displays to advanced shunt-based monitors with Ah tracking.
NOTE: The products listed in this section are battery monitors and gauges. For complementary products, explore our full range of Deep Cycle Batteries, Lithium Batteries, and Battery Terminals.
Why Use a Battery Monitor?
Batteries don't fail without warning – but without monitoring, it's easy to miss the signs. A quality battery monitor helps you:
- See real-time voltage and state of charge (SOC) at a glance
- Prevent deep discharge, which shortens battery lifespan
- Understand how much capacity you're using and what's left
- Manage power more efficiently across multiple appliances
- Protect lithium batteries that require tighter charge management
Whether you're off-grid for a weekend or living aboard full time, a battery monitor removes the guesswork.
Types of 12V Battery Monitors
Not all monitors are the same. Here's a quick breakdown to help you choose:
| Type | What It Does | Best For | Accuracy |
|---|---|---|---|
| Voltmeter / Voltage Display | Shows current battery voltage | Quick checks, basic setups | Good (voltage) |
| Smart Battery Monitor | Tracks SOC, Ah consumed, and charge/discharge rates | RVs, solar, marine | High |
| Shunt-Based Monitor | Uses a precision shunt for highly accurate Ah and SOC readings | Lithium systems, off-grid power banks | Very High |
| Bluetooth / Wireless Monitor | Sends data to a smartphone app | Remote monitoring, hard-to-reach batteries | High (app-dependent) |
Browse our range of 12V battery monitors below:
