NOCO Genius GEN5X3
#9 in 3 and 4 bankFull review
For a small bass boat with a starting battery and a 24 V trolling pair that wants lithium support on a budget. Heavy daily use is better served by 10 A banks.
Amazon $199.95$199.95
3.3/5
For bass boats with a starting battery and a 24 V trolling pair, with ignition protection for gasoline engine bays.
- 20 A totalOutput
- 20 ATotal current
- YesLithium mode
- IP67Water rating
Check price at Amazon$255.63
Price checked November 2, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- Distributed-On-Demand sends a full starting battery’s unused amps to the drained trolling battery, so it finishes sooner
- IP67 case built to ABYC A-31 with ignition protection
- LiFePO4, AGM, gel and flooded profiles
- 20 A total refills a pair or trio of deep cycle batteries overnight
Cons
- Lithium mode only covers ProMariner approved batteries
- Charge gauge shows overall progress, not each battery’s level
- 3 year warranty, against 5 on ProMariner’s own ProTournament line
The ProMariner ProSport HD family
Every ProMariner ProSport HD model we rank, smallest first. Ratings compare each against its own bank count.
| Model | Output | Rating | Price |
|---|---|---|---|
| ProMariner ProSport HD 6 | 1 x 6 A | 2.8/5 | $135.99 |
| ProMariner ProSport HD 8 | 8 A total | 2.9/5 | $169.99 |
| ProMariner ProSport HD 12 | 2 x 6 A | 3.2/5 | $201.30 |
| ProMariner ProSport HD 20 | 20 A total | 3.5/5 | $249.99 |
| ProMariner ProSport HD 20 Plus (this one) | 20 A total | 3.3/5 | $255.63 |
How it scores
The rating comes from 4 measured or published factors, each scored 0-100 against fixed reference points for its bank count. How we rank explains each one.
Specifications
| Model number | 44021 |
|---|---|
| Charging | |
| Banks | 3 |
| Total current | 20 A |
| Lithium mode | Yes |
| AGM mode | Yes |
| Build | |
| Water rating | IP67 |
| Display or app | No |
| Ignition protected | Yes |
| Weight | 7.8 lb |
| Warranty | 3 years |
| Released | 2021-01-25 |
Alternatives in this bank count
Minn Kota MK-318PCL
#10 in 3 and 4 bankFull review
For a smaller bass boat with a starting battery and a 24 V trolling pair that sees light use; heavy daily use calls for 10 A banks.
Amazon $235.01$235.01
Guest ChargePro 2713A
#12 in 3 and 4 bankFull review
A budget three bank charger for a lead acid starting battery and a 24 V trolling pair. It has no lithium mode.
Amazon $170$170
Compare
Compare the ProMariner ProSport HD 20 Plus with any other onboard marine battery charger →
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