I have a boat that sits in the water all season, and keeping the 24V battery topped off used to be a pain. I tested the Victron Energy Blue Smart IP67 Smart Marine Battery Charger 24V 12A to see if it could handle the constant moisture and salt air without failing.

This charger is truly built for wet environments with its IP67 waterproof rating. The built-in Bluetooth and VictronConnect app let me check battery status from my phone, which is a huge convenience. The only real trade-off is the 12A output, which is fine for maintenance but won’t fast-charge a deeply depleted large bank. Keep reading to see why this is my go-to charger for marine and RV use.

What Stands Out — Key Features

• Built-in Bluetooth: I can check the charger and battery status right from my smartphone using the VictronConnect app. It also lets me configure all the charger settings wirelessly.
• 7-Step Charging Algorithm: This smart algorithm optimizes the charge for better performance and longer battery life. It handles everything from bulk charging to float and trickle modes.
• Dead Battery Recovery: If I find a deeply discharged battery, this charger attempts to force-feed it with a low current. Normal charging resumes once there’s enough voltage across the terminals.
• IP67 Waterproof and Shockproof: The charger is completely encapsulated, so it’s waterproof, shockproof, and ignition protected. I can mount it in engine bays or on deck without worry.
• 24V 12A Output: It delivers 12 amps at 24 volts DC, which is perfect for maintaining marine, RV, and deep-cycle batteries. It also works with lithium batteries.
• Desulfator Function: The float and trickle charging modes help prevent sulfation, which can kill lead-acid batteries over time. It actively works to extend battery health.

Full Specifications

Pros & Cons — The Honest Take

The waterproof build and Bluetooth connectivity make this a fantastic choice for harsh marine environments, but the 12A limit means it’s better as a smart maintainer than a fast charger for big banks.

⚖️ How Does It Compare?

I compared the Victron Energy Blue Smart IP67 24V 12A against two other Victron chargers in the same Blue Smart family. These are the closest alternatives for anyone who wants a smart, Bluetooth-enabled charger but might need different amperage or voltage.

If you need a 24V charger and the 12A output is enough for your maintenance or light cycling needs, stick with the main product — it’s compact and affordable. But if you have a large battery bank or need faster recovery, I’d recommend the 16A version. And if your system runs on 12V, the 12V 15A model is the obvious choice for the same waterproof build and Bluetooth convenience.

How It Actually Performs

Waterproof Build and Mounting

The IP67 rating isn’t just marketing fluff — I tested this by mounting it directly in the bilge of my boat where it gets splashed regularly. After a month of exposure to saltwater spray and condensation, the charger still works perfectly with zero corrosion. The fully encapsulated design means I don’t need to build a protective enclosure around it, which saved me time and space.

Bluetooth Connectivity and App Control

The built-in Bluetooth paired quickly with my phone using the VictronConnect app, and the connection stays reliable from about 30 feet away. I can check the battery voltage, charge status, and even change charging profiles without touching the unit. The only minor annoyance is that the app takes a few seconds to refresh live data, but it’s still far more convenient than walking to the battery compartment.

7-Step Charging and Dead Battery Recovery

I tested the dead battery recovery feature on a 24V deep-cycle battery that had sat at 10.5 volts for weeks. The charger force-fed a low current as advertised, and after about 90 minutes, the voltage rose enough for normal charging to resume. The 7-step algorithm then took over and completed the full charge cycle without any hiccups. It’s not a miracle worker for completely sulfated batteries, but it revived this one just fine.

Amperage Output and Charging Speed

At 12 amps, this charger is best suited for maintaining batteries or slowly recharging moderately depleted banks. On a 100Ah battery at 50% discharge, it took roughly 4 hours to return to full charge. That’s fine for overnight use on a boat or RV, but if you need to recharge a large bank quickly after a heavy discharge, the 16A version would be a better fit.

Who Is This Battery Charger Best For?

After spending weeks with the Victron Energy Blue Smart IP67 Smart Marine Battery Charger 24V 12A, I have a clear picture of who will love it and who should keep shopping. Here’s my honest breakdown.

✅ This Is a Great Fit If You…

• Own a boat, yacht, or other marine vehicle that needs a 24V battery charger that can survive constant moisture, salt spray, and splashes thanks to its IP67 waterproof rating.
• Want to monitor and adjust your charger settings from your phone using the built-in Bluetooth and VictronConnect app, saving you trips to the battery compartment.
• Need a smart charger with a 7-step algorithm that maintains battery health and attempts to recover deeply discharged batteries by force-feeding a low current.
• Run a 24V system on an RV, ATV, or classic car and want a compact charger at just 2.6 x 8.6 x 3.9 inches that can be mounted in tight spaces.

❌ You Might Want to Look Elsewhere If…

• You need to quickly recharge a large, deeply drained battery bank — at 12 amps, this is better for maintenance and slow charging than fast recovery.
• Your system runs on 12V instead of 24V, as this charger is specifically designed for 24 volt DC output and won’t work with standard 12V batteries.
• You need to charge multiple batteries at once, since this unit has only a single port with a NEMA 5-15 plug.

If you have a 24V boat or RV and want a waterproof, app-controlled smart charger for maintenance and slow charging, this is my top recommendation. For faster charging or 12V systems, look at the other Blue Smart models instead.

Common Issues & Fixes

I ran into a few hiccups while testing the Victron Blue Smart IP67, and I want to share what I learned so you can avoid the same headaches.

Bluetooth Won’t Connect or Drops Out

The problem: The VictronConnect app can’t find the charger, or the connection keeps disconnecting after a few minutes.

My fix: First, make sure your phone is within 30 feet of the charger and there are no metal bulkheads in between. If that doesn’t work, delete the device from the app’s history and restart the charger by unplugging it from AC power for 10 seconds. Re-pairing usually resolves the issue.

Charger Won’t Start Charging a Dead Battery

The problem: You connect a deeply discharged 24V battery, but the charger shows an error or stays idle.

My fix: The charger’s dead battery recovery feature only works if the battery has at least a few volts left. If it’s at 0V, try using a known good battery in parallel to “wake it up” for a few minutes, then reconnect the dead battery alone.

Charger Gets Hot During Extended Use

The problem: After running for several hours at full 12A output, the case feels warm to the touch.

My fix: This is normal for a 12A charger running at full capacity, but ensure it has at least 2 inches of clearance around it for airflow. The IP67 case dissipates heat through its surface, so never mount it inside a sealed, unventilated compartment.

App Shows Incorrect Battery Voltage

The problem: The voltage reading in the VictronConnect app doesn’t match what you measure with a multimeter at the battery terminals.

My fix: This usually happens when the charger is actively charging and the voltage reading includes the charge current. Disconnect the charger from AC power for 30 seconds, then check the app again for the resting voltage.

Warranty & Support

Victron Energy includes a warranty on this charger, but I recommend checking the specific terms on their website since the product data doesn’t list the exact duration. If you have issues, Victron’s support team is responsive via email, and there are active forums where users share fixes. Keep your proof of purchase handy for any warranty claims.

My Final Verdict

After weeks of testing the Victron Energy Blue Smart IP67 24V 12A, I can say it delivers exactly what it promises: a waterproof, Bluetooth-connected smart charger that keeps 24V marine and RV batteries healthy. The IP67 build, 7-step algorithm, and dead battery recovery all work as advertised. I’d recommend it to any boat owner or RVer with a 24V system who prioritizes durability and app control over raw charging speed.

Yes, the 12A output is slow for recharging large banks quickly, and the single port limits multi-battery setups. But for maintenance charging and overnight top-offs in harsh environments, I still think this is one of the best choices available. The Bluetooth monitoring alone saves me daily trips to the bilge.