When people are planning a campervan electrical system, battery monitors are rarely at the top of the shopping list.
Solar panels, leisure batteries, inverter chargers and DC-DC chargers usually come first, and understandably so. They're the components that power your adventures.
A battery monitor, on the other hand, doesn't generate power or charge your batteries. It simply tells you what's happening.
So it's a fair question to ask.
Is it actually worth buying one?
For many campervan owners, the answer is yes—but it depends on your electrical system and how you use your van.
What Does a Battery Monitor Actually Do?
Think of a battery monitor as the dashboard for your electrical system.
Rather than trying to work out how your battery is performing from a single voltage reading, it measures the power flowing into and out of your battery.
That allows you to see things like:
- How much battery capacity you have left
- Whether you're charging or discharging
- How much power your appliances are using
- How long your battery is likely to last at your current usage
Instead of making assumptions, you have accurate information.
When Does a Battery Monitor Become Useful?
Not everyone needs one.
If you only use your campervan occasionally, spend most nights on electric hook-up and have a very simple electrical system, you may never feel the need for a battery monitor.
However, once you start relying on your leisure battery, it quickly becomes much more valuable.
For example, if you regularly camp off-grid, run a compressor fridge, charge laptops, use an inverter or depend on solar charging, knowing exactly how much battery capacity you have left can save a lot of uncertainty.
Rather than wondering whether you'll make it through another evening, you already know.
It's Not About Watching Numbers
One of the biggest misconceptions is that battery monitors are only for people who enjoy looking at technical data.
In reality, they're there to answer simple questions.
Can I leave the fridge running while we head out for the day?
Do we have enough battery for another night without driving?
Are the solar panels replacing the power we've used?
Is everything charging as it should?
You don't need to understand every figure on the screen.
Most of the time, you're simply looking for reassurance that your electrical system is doing what it should.
So, Is It Worth It?
In our opinion, yes—particularly if you've already invested in a quality electrical system.
A battery monitor won't increase your battery capacity or make your appliances use less power.
What it does do is help you get the most from the system you've already paid for.
It also makes it much easier to spot if something isn't working as expected, whether that's poor charging, higher-than-normal power consumption or a battery that isn't performing properly.
Which Victron Battery Monitor Should You Choose?
If you've decided a battery monitor is worth having, there are two Victron products we'd usually recommend.
Victron SmartShunt
For most campervan conversions, this is the option we'd suggest first.
The SmartShunt connects to your phone using Bluetooth and displays everything through the VictronConnect app.
If you're already using Victron products elsewhere in your electrical system, everything sits together in one place, making it easy to check your battery whenever you need to.
There's no separate display to mount, so the installation stays neat and uncluttered.
Ideal if you:
- Prefer using your phone
- Want a tidy installation
- Already use the VictronConnect app
Victron BMV-712 Smart
The BMV-712 Smart measures the same information as the SmartShunt but adds a dedicated display inside your campervan.
That means you can check your battery status at a glance without opening an app.
You still get Bluetooth connectivity and access to VictronConnect, so you're not giving anything up—you simply have another way to view your battery information.
It's a great option if you like having key information permanently visible.
Ideal if you:
- Prefer a physical display
- Want instant battery information
- Like monitoring your system from inside the van
Which One Would We Buy?
The good news is there's no wrong choice.
Both products provide accurate battery monitoring and integrate seamlessly with the wider Victron ecosystem.
If someone asked us for a recommendation without any other information, we'd usually point them towards the SmartShunt. It's compact, simple and suits the majority of campervan electrical systems.
However, if you'd rather have a dedicated display inside your van, the BMV-712 Smart is every bit as capable.
The decision really comes down to personal preference rather than performance.
Frequently Asked Questions
Can I add a battery monitor later?
Yes. Many people fit a battery monitor after they've finished building their electrical system.
Will it work with lithium batteries?
Yes. Both the SmartShunt and the BMV-712 Smart are compatible with lithium, AGM and lead-acid batteries.
Does a battery monitor save power?
No. It doesn't reduce power consumption, but it helps you understand how your battery is performing so you can use your electrical system more efficiently.
Is the SmartShunt more accurate than the BMV-712?
No. Both measure battery performance in the same way. The main difference is how you choose to view the information.
Final Thoughts
A battery monitor isn't essential for every campervan, but once you've used one, it's easy to see why so many people choose to fit one.
It removes much of the uncertainty around battery management and gives you a clearer picture of how your electrical system is performing day to day.
Whether you choose the Victron SmartShunt or the BMV-712 Smart, you'll be able to monitor your battery with confidence and make better-informed decisions when you're away from home.
