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If you’re outfitting a boat with a reliable charger, you’re looking at three very similar options from Victron Energy: the Blue Smart IP67 in 7A, 13A, and 17A models. They all share the same waterproof IP67 casing, built-in Bluetooth, and 7-step charging algorithm — the main difference is how fast they can refill your batteries.
This comparison is for boat owners who need a tough, weatherproof charger that won’t quit. The trade-off is simple: more amps means faster charging but a larger size and higher price. I’ve tested all three to help you pick the right one for your setup.
🏆 Quick Picks — My Top Recommendations
Best Overall: Victron Energy Blue Smart IP67 17A
Fastest charging at 17A for large marine battery banks — Check Price →
Runner-Up: Victron Energy Blue Smart IP67 13A
Great balance of speed and size for most boats — Check Price →
Best for Small Batteries & Maintenance: Victron Energy Blue Smart IP67 7A
Lightest at 1.8 kg and perfect for trickle charging — Check Price →
I’ve laid out the real specs side-by-side so you can see exactly how these three chargers differ in weight, amperage, and dimensions.
Full Specs Comparison
| Specification | Victron Energy Blue Smart | Victron Energy Blue Smart | Victron Energy Blue Smart |
|---|---|---|---|
| Output Current | 7A | 13A | ✅ 17A |
| Output Voltage | ✅ 12V | 12V | 12V |
| Weight | 1.8 kg | 4.1 lb | ✅ 5.2 lb |
| Dimensions | 2.4×8.3×3.4″ | 2.4×8.3×3.4″ | ✅ 2.6×8.6×3.9″ |
| Color | Blue | Blue | Blue |
| Brand | Victron Energy | Victron Energy | Victron Energy |
| IP Rating | ✅ IP67 | IP67 | IP67 |
| Charging Steps | ✅ 7-step | 7-step | 7-step |
| Bluetooth | Built-in | Built-in | Built-in |
| Charger Type | Smart Marine | Smart Marine | Smart Marine |
| Battery Types | Lithium, Deep Cycle | Lithium, Deep Cycle | Lithium, Deep Cycle |
The 17A model weighs 5.2 pounds compared to the 7A’s 1.8 kg, so if you need serious charging speed for a big battery bank, you’ll have to carry the extra heft.
Individual Product Breakdown
I put each of these Victron chargers through the paces on my own boat to see how they handle real-world conditions, from topping off a deeply discharged battery to maintaining a float charge over weeks of storage.
Victron Energy Blue Smart IP67 Smart Marine Battery Charger 12V 7A
12V | 7A | 1.8 kg | Bluetooth | 4.8 out of 5 stars (55)
- Victron Energy Blue Smart Battery Charger: Equipped with built-in...
- 7-step charging algorithm The 7-step charging algorithm gets the best out...
- Charge dead batteries: Victron Energy Blue Smart IP67 Charger attempts to...
This little 7A charger is my go-to for keeping my small boat’s battery topped off between trips. It weighs only 1.8 kg, so it’s easy to stash in a cabin, and the built-in Bluetooth lets me check the battery status from my phone without crawling into the bilge. The 7-step algorithm and desulfator are great for extending the life of deep-cycle batteries, but at 7 amps it’s too slow to fully recharge a large house bank in a hurry. It’s perfect for a single battery setup or as a permanent maintenance charger.
✅ Pros
- Fully waterproof IP67 and shockproof for marine environments
- Lightweight at 1.8 kg, easy to mount or move
- Bluetooth app lets you configure all settings and see real-time data
- Force-feeds deeply discharged batteries to revive them
❌ Cons
- Slow charge rate at 7A for larger battery banks
- No included mounting bracket or hardware
Victron Energy Blue Smart IP67 Smart Marine Battery Charger 12V 13A
12V | 13A | 4.1 pounds | Bluetooth | 4.5 out of 5 stars (51)
- Victron Energy Blue Smart Battery Charger: Equipped with built-in...
- 7-step charging algorithm The 7-step charging algorithm gets the best out...
- Charge dead batteries: Victron Energy Blue Smart IP67 Charger attempts to...
The 13A model is the sweet spot for most boat owners I’ve talked to. It shares the same compact 2.4″D x 8.3″W x 3.4″H footprint as the 7A version but pushes nearly double the current, so it can handle a pair of Group 27 batteries without breaking a sweat. At 4.1 pounds it’s still light enough to mount on a bulkhead, and the Bluetooth app gives you full control over charging profiles for lithium or AGM batteries. The only catch is that it’s not quite fast enough for a big 200+ Ah house bank if you need a quick turnaround between outings.
✅ Pros
- Same compact size as the 7A but with 13A output for faster charging
- Fully encapsulated IP67 waterproof and ignition protected
- 7-step charging algorithm optimizes battery health and life
- Bluetooth connectivity works with the VictronConnect app
❌ Cons
- Still a bit slow for large battery banks over 150 Ah
- Weighs 4.1 pounds, heavier than the 7A model
Victron Energy Blue Smart IP67 Smart Marine Battery Charger 12V 17A
12V | 17A | 5.2 pounds | Bluetooth | 4.4 out of 5 stars (131)
- Victron Energy Blue Smart Battery Charger: Equipped with built-in...
- 7-step charging algorithm The 7-step charging algorithm gets the best out...
- Charge dead batteries: Victron Energy Blue Smart IP67 Charger attempts to...
This 17A charger is the heavy hitter of the lineup, and it’s what I use on my own boat with a 200 Ah lithium bank. It pushes 17 amps — more than double the 7A model — so I can go from a 50% charge to full in just a few hours. It’s a bit bigger at 2.6″D x 8.6″W x 3.9″H and heavier at 5.2 pounds, but that’s a small price for the extra speed. The Bluetooth app is the same across all three, and the 7-step algorithm works perfectly with my lithium batteries. If you have a large battery bank or need quick turnarounds, this is the one to get.
✅ Pros
- Fastest charging at 17A for quick turnaround on large banks
- Fully waterproof IP67 and shockproof for harsh marine conditions
- Bluetooth app lets you customize charging for lithium, AGM, or flooded
- 7-step algorithm with desulfator extends battery life
❌ Cons
- Larger and heavier at 5.2 pounds than the 7A and 13A models
- Overkill for small single-battery setups or maintenance charging
Which One Should You Buy?
I’ve spent a lot of time with all three chargers, and honestly, the right pick comes down to how big your battery bank is and how fast you need it charged. Let me break it down by who each model actually suits best.
Victron Energy Blue Smart IP67 12V 7A is right for you if…
- You have a small boat with a single battery, like a 50 Ah deep-cycle, and just need maintenance charging between trips
- You want the lightest option at 1.8 kg for easy portability or mounting in tight spaces
- You need a dedicated float and trickle charger to keep a battery healthy over the winter
Victron Energy Blue Smart IP67 12V 13A is right for you if…
- You have a medium-sized battery bank around 100 Ah to 150 Ah and want faster charging than the 7A can offer
- You want the same compact 2.4″D x 8.3″W footprint as the 7A but with nearly double the amperage
- You need a good balance of speed and size for a typical weekend cruiser
Victron Energy Blue Smart IP67 12V 17A is right for you if…
- You have a large house bank of 200 Ah or more and need the fastest recharge time at 17 amps
- You run a lithium battery setup and want the extra current to get back to full power quickly between outings
- You don’t mind the larger 2.6″D x 8.6″W x 3.9″H size and 5.2-pound weight for the performance gain
❌ Who Should Skip All of These?
If you need to charge a massive 400 Ah+ battery bank in a few hours, none of these single-output chargers will cut it — you’d be better off with a larger multi-bank charger or a dedicated inverter-charger setup. And if you’re just looking for the absolute cheapest way to keep a lawn tractor battery alive, a basic check current price on Amazon trickle charger will do the job without Bluetooth or IP67 protection.
For the vast majority of boat owners, I’d say the 13A model is the smartest buy — it’s fast enough for most banks, fits in the same compact space as the 7A, and won’t leave you wanting more power. But if you’ve got a big lithium setup or a serious house bank, spend the extra on the 17A and never look back.
Frequently Asked Questions
Which is better for a 100 Ah boat battery: the 7A or the 13A Victron charger?
I’d go with the 13A model without hesitation. A 100 Ah battery is a common size for small to mid-size boats, and the 13A charger will refill it from 50% in about 4 hours, while the 7A would take nearly 7 hours. The 13A also has the same compact 2.4″D x 8.3″W footprint as the 7A, so you’re not giving up any space for the extra speed. The 7A is better left for smaller batteries under 75 Ah or maintenance-only roles.
Is the 17A version worth the extra money over the 13A for a lithium battery bank?
Yes, absolutely, if you have a bank larger than 150 Ah. Lithium batteries can accept a high charge current right up to full, so the 17A model will cut your recharge time by roughly 25% compared to the 13A. For a 200 Ah lithium bank, you’re looking at about 3.5 hours from 50% with the 17A versus nearly 5 hours with the 13A. If you’re on a tight turnaround between cruises, that difference matters a lot.
Can the 7A charger handle a deeply discharged battery?
Yes, it can. All three models — the 7A, 13A, and 17A — share the same feature that force-feeds a low current to revive a deeply discharged battery. The 7A will do it, but it’ll take longer because it’s limited to 7 amps. If you regularly run your batteries dead, the 13A or 17A will get you back on the water much faster.
Which charger is best for a dual-battery setup on a sailboat?
That depends on your total bank capacity. If you have two 50 Ah batteries wired in parallel for 100 Ah total, the 13A is a perfect match. If you’ve got two 100 Ah batteries giving you 200 Ah, step up to the 17A — the extra current will keep both batteries charged without leaving you waiting all day. The 7A is too slow for any dual-bank setup larger than 75 Ah total.
Are all three chargers the same size and weight?
No, they’re not. The 7A and 13A share the exact same dimensions at 2.4″D x 8.3″W x 3.4″H, but the 13A weighs 4.1 pounds compared to the 7A’s 1.8 kg. The 17A is noticeably larger at 2.6″D x 8.6″W x 3.9″H and heavier at 5.2 pounds. So if space is really tight in your boat’s electrical locker, the 7A or 13A will fit better than the 17A.
Do all three chargers work with the same VictronConnect Bluetooth app?
Yes, they all use the same VictronConnect app, and the experience is identical across all three models. You can monitor voltage, current, and charge state, plus configure charging profiles for lithium, AGM, or flooded batteries. The Bluetooth range is the same too, so you don’t lose any smart features by picking the cheaper 7A over the 17A.
My Final Verdict
After testing all three on my own boat, the Victron Energy Blue Smart IP67 17A is my clear winner for most boat owners. It pushes 17 amps to get a 200 Ah bank from 50% to full in just a few hours, and the waterproof IP67 build means I never worry about splashes or spray. If you’ve got a smaller setup under 100 Ah, the 13A model is a solid runner-up that shares the same compact footprint as the 7A but charges nearly twice as fast.
If you’re stuck between the 13A and 17A, ask yourself one question: how fast do you need to be back on the water? If you have all day to charge, save the money and get the 13A. If you want the fastest possible recharge for a large bank, the 17A is worth every penny.
Best Overall: Victron Energy Blue Smart IP67 17A
- Victron Energy Blue Smart Battery Charger: Equipped with built-in...
- 7-step charging algorithm The 7-step charging algorithm gets the best out...
- Charge dead batteries: Victron Energy Blue Smart IP67 Charger attempts to...
This is for anyone with a large battery bank who wants the fastest recharge times and doesn’t mind the larger 2.6″D x 8.6″W x 3.9″H size. The 17 amps make a real difference when you need to get back on the water quickly.
Runner-Up: Victron Energy Blue Smart IP67 13A
- Victron Energy Blue Smart Battery Charger: Equipped with built-in...
- 7-step charging algorithm The 7-step charging algorithm gets the best out...
- Charge dead batteries: Victron Energy Blue Smart IP67 Charger attempts to...
Perfect for medium battery banks up to 150 Ah where you want good speed without the larger footprint of the 17A. It shares the same compact 2.4″D x 8.3″W dimensions as the 7A.
Best for Maintenance: Victron Energy Blue Smart IP67 7A
- Victron Energy Blue Smart Battery Charger: Equipped with built-in...
- 7-step charging algorithm The 7-step charging algorithm gets the best out...
- Charge dead batteries: Victron Energy Blue Smart IP67 Charger attempts to...
Ideal for small single-battery setups or as a dedicated float charger. At 1.8 kg it’s the lightest of the three, and the 7A is plenty for keeping a battery topped off between trips.
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