For a two battery boat with large deep cycle or lithium batteries that need a fast overnight charge.
Amazon $285.82The Minn Kota MK-230PCL is the better onboard marine battery charger overall, rated 4.1 to 3.5. The Minn Kota MK-230PCL leads on features, charge current and value. The ProMariner ProSport HD 20 costs $35.83 less ($249.99 vs $285.82).
For a boat with a starting battery and a big 12 V trolling or house battery, where shared current gets the drained battery full fastest.
Amazon $249.99Prices were last checked November 2, 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 Minn Kota MK-230PCL for features (lithium mode, temperature compensation, charge display or app vs lithium mode, IP67 or better), charge current (30 A total (2 banks of 15 A) vs 20 A total) and value ($9.53 per amp ($285.82, 30 A total) vs $12.50 per amp ($249.99, 20 A total)).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every 1 and 2 bank onboard marine battery charger; a clear win is highlighted. How we rank explains each one.
| Factor weight | Minn Kota MK-230PCL | ProMariner ProSport HD 20 |
|---|---|---|
| Overall rating | 4.1/5 | 3.5/5 |
| Value 30% | 89 $9.53 per amp ($285.82, 30 A total) | 72 $12.50 per amp ($249.99, 20 A total) |
| Charge current 15% | 100 30 A total (2 banks of 15 A) | 58 20 A total |
| Features 25% | 75 lithium mode, temperature compensation, charge display or app | 50 lithium mode, IP67 or better |
| Warranty 30% | 50 3-year warranty | 50 3-year warranty |
Specifications
| Minn Kota MK-230PCL | ProMariner ProSport HD 20 | |
|---|---|---|
| Charging | ||
| Banks | 2 | 2 |
| Current per bank | 15 A | - |
| Total current | 30 A | 20 A |
| Lithium mode | Yes | Yes |
| AGM mode | Yes | Yes |
| Temperature compensation | Yes | - |
| Build | ||
| Water rating | - | IP67 |
| Display or app | Yes | No |
| Ignition protected | - | Yes |
| Weight | 11.2 lb | 7.2 lb |
| Warranty | 3 years | 3 years |
| Released | 2024-07-26 | 2021-01-25 |
