For tournament bass boats with a 36 V trolling bank and a starting battery that need to be full by morning, with the longest warranty in the class.
Amazon $413.76An onboard charger is bolted into the boat and wired to each battery, so plugging one shore power cord into the dock charges the starting battery and the trolling motor bank at once, each bank on its own circuit. These rankings compare what the makers publish on the same terms: charge current for the money, total charge current, the features that matter on the water and the warranty.
Banks are the first choice: one per 12 V battery. A small boat with a starting battery and a 12 V trolling motor needs two banks; a 24 V trolling motor adds one more battery and a 36 V motor two more, so most bass boats need three or four.
Amps per bank are the second. Divide the battery’s amp hours by the amps per bank for a rough charge time: a 100 Ah trolling battery takes about 10 hours on a 10 A bank and under 7 hours on a 15 A bank.
Lithium mode is the third. A lithium (LiFePO4) trolling battery needs its own charge profile, and older lead-acid chargers can leave it undercharged or never finish.
Top Picks
The heavy hitter for a 36 V trolling motor bank plus a starting battery that gets drained every day.
Amazon $484.26Shop by Bank Count
1 and 2 bank
16 rankedA starting battery and a house or 12 V trolling motor battery: small boats, jon boats and skiffs.
Top rated: Minn Kota MK-230PCL $285.82
3 and 4 bank
12 rankedA starting battery plus a 24 V or 36 V trolling motor bank: bass boats and bigger fishing boats.
Top rated: ProMariner ProTournament Elite 360 Quad $413.76
Narrow It Down
Prices 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.
Best 1 and 2 Bank Onboard Marine Chargers
- Minn Kota MK-230PCL#1 of 16Full review
For a two battery boat with large deep cycle or lithium batteries that need a fast overnight charge.
Amazon $285.82$285.82230 AYes - NOCO Genius GENPRO10X2#2 of 16Full review
For a boat with a starting battery and a 12 V trolling or house battery that gets drained hard, with lithium support on both banks.
Amazon $224.95$224.95220 AYes - NOCO Genius GENPRO10X1#3 of 16Full review
For one deep cycle or lithium battery that needs a real overnight recharge, such as a 12 V trolling motor on a small boat.
Amazon $116.50$116.50110 AYes - Minn Kota MK-220PCL#4 of 16Full review
For a boat with a starting battery and a 12 V trolling or house battery, at a useful 10 A a bank and with lithium support.
Amazon $242.57$242.57220 AYes - NOCO Genius GEN5X2#5 of 16Full review
A low cost two bank charger for a skiff or jon boat with a starting battery and one trolling or house battery, including lithium. Its 5 A banks suit modest batteries best.
Amazon $139.95$139.95210 AYes
Best 3 and 4 Bank Onboard Marine Chargers
- ProMariner ProTournament Elite 360 Quad#1 of 12Full review
For tournament bass boats with a 36 V trolling bank and a starting battery that need to be full by morning, with the longest warranty in the class.
Amazon $413.76$413.76436 AYes - Minn Kota MK-460PCL#2 of 12Full review
The heavy hitter for a 36 V trolling motor bank plus a starting battery that gets drained every day.
Amazon $484.26$484.26460 AYes - ProMariner ProTournament Elite 240 Quad#3 of 12Full review
For a four battery boat that wants a pro grade charger with a charge level monitor and a 5 year warranty, at less than the 36 A model.
Amazon $336.76$336.76424 AYes - Minn Kota MK-345PCL#4 of 12Full review
For a three battery boat with big deep cycle or lithium trolling batteries that need the fastest Minn Kota charge.
Amazon $372.02$372.02345 AYes - NOCO Genius GENPRO10X4#5 of 12Full review
For bigger fishing boats with a 36 V trolling motor bank plus a starting battery, charging all four at 10 A each.
Amazon $424.95$424.95440 AYes
How We Rank
Each charger is ranked against others with the same number of banks, and scored on its price per amp of total charge current, its total charge current, its lithium mode, waterproofing, temperature compensation and display, and its warranty.
| Factor | Measures | Weight |
|---|---|---|
| Value | price per amp of total charge current | 30% |
| Charge current | total charge current across all banks | 15% |
| Features | lithium mode, waterproofing, temperature compensation and a display | 25% |
| Warranty | warranty length | 30% |
How we rank explains each factor in full.