Victron Blue Smart IP65 12/15
#1 in Over 5 AFull review
A long warranty, app connected charger for owners of larger lead acid or lithium batteries who value build quality over price.
NAZ Solar Electric $175.95$175.95
The Victron Blue Smart IP65 12/15 is the better battery charger overall, rated 3.9 to 2.9. The Victron Blue Smart IP65 12/15 leads on value and features. The Victron Blue Smart IP65 12/15 costs $201.13 less ($175.95 vs $377.08).
CTEK NXT 15
#12 in Over 5 AFull review
A high end 15 A charger and supply for owners of big 12 V batteries in trucks, RVs and boats who want lithium support.
Amazon $377.08$377.08
Prices were last checked October 31, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Which should you buy?
- Choose the Victron Blue Smart IP65 12/15 for value ($11.73 per amp ($175.95, 15 A) vs $25.14 per amp ($377.08, 15 A)) and features (lithium mode, temperature compensation, repair mode, power supply mode vs lithium mode, temperature compensation, power supply mode).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every over 5 A battery charger; a clear win is highlighted. How we rank explains each one.
| Factor weight | Victron Blue Smart IP65 12/15 | CTEK NXT 15 |
|---|---|---|
| Overall rating | 3.9/5 | 2.9/5 |
| Value 35% | 47 $11.73 per amp ($175.95, 15 A) | 9 $25.14 per amp ($377.08, 15 A) |
| Charge current 20% | 41 15 A | 41 15 A |
| Features 25% | 100 lithium mode, temperature compensation, repair mode, power supply mode | 75 lithium mode, temperature compensation, power supply mode |
| Warranty 20% | 100 5-year warranty | 50 warranty not published (neutral score used) |
Specifications
| Victron Blue Smart IP65 12/15 | CTEK NXT 15 | |
|---|---|---|
| Charging | ||
| Charge current | 15 A | 15 A |
| Voltage | 12 V | 12 V |
| Largest battery | 150 Ah | 350 Ah |
| Lithium mode | Yes | Yes |
| AGM mode | No | - |
| Temperature compensation | Yes | Yes |
| Repair mode | Yes | - |
| Power supply mode | Yes | Yes |
| Build | ||
| Ingress rating | IP65 | - |
| Weight | 2 lb | - |
| Warranty | 5 years | - |
| Released | - | 2025-11-20 |