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Minn Kota MK-550 5 Bank 10 AMP Precision Onboard Battery Charger
Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.
$749.99
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SKU: WX2*0726022
Overview
Built for anglers who rely on multiple batteries and want a charger that can keep pace with long days on the water, this onboard unit is designed to manage charging with minimal guesswork. Its selectable battery type setting supports 12V AGM, 12V flooded lead acid, and 12V lithium (LiFePO4), allowing the charge curve to match the battery being used. Automatic temperature compensation and low-line voltage compensation help maintain consistent charging in changing conditions, while the microprocessor-based control and LED indicators add practical feedback during use. Waterproof, shock-resistant, and vibration-resistant construction makes it a sensible choice for boats where the charger stays installed and ready.
Why Hunters Choose the Minn Kota
Selectable Battery
Type supports 12V AGM, flooded
Automatic Temperature
Compensation adjusts charging to ambient
Low-line Voltage
Compensation helps maintain a consistent
Digitally Microprocessor-based
Control includes automatic wake-up for
Waterproof, Shock-resistant,
Vibration-resistant construction suits demanding onboard
Key Features
- 5-bank onboard charger with 10 AMP output per bank.
- Supports 12V AGM, 12V flooded lead acid, and 12V lithium (LiFePO4) batteries.
- Selectable battery type helps deliver a charge curve optimized for the battery.
- Automatic temperature compensation adjusts charging for ambient temperature fluctuations.
- Low-line voltage compensation helps maintain consistent charging when outlet voltage is below 120V.
- Digitally microprocessor-based control includes LED indicator lights and can wake dead 12V lithium (LiFePO4) batteries from standby.
- Waterproof, shock-resistant, and vibration-resistant construction with battery equalization for lead acid batteries.
Best Used For
- Boat owners running multiple 12V batteries who want onboard charging for extended time on the water.
- Anglers using AGM, flooded lead acid, or lithium (LiFePO4) batteries and needing selectable charging support.
- Users charging in changing temperatures who want automatic temperature compensation during setup and use.
- Operators dealing with lower outlet voltage who need consistent charging from a low-line power source.
- Boat setups exposed to vibration and moisture where waterproof, shock-resistant onboard construction matters.
Specifications
| Amperage | 10 AMP |
|---|---|
| Automatic Temperature Compensation | Yes |
| Battery Equalization | Yes |
| Battery Type Support | 12V AGM, 12V flooded lead acid, 12V lithium (LiFePO4) |
| Digitally Microprocessor Based Control | Yes |
| Led Indicator Lights | Yes |
| Low Line Voltage Compensation | Yes |
| Number Of Banks | 5 |
| Selectable Battery Type | Yes |
| Shock Resistant Construction | Yes |
| Vibration Resistant Construction | Yes |
| Wake Dead 12v Lithium Li Fe Po4 Batteries | Yes |
| Waterproof Construction | Yes |
Pros
- Selectable battery type supports 12V AGM, flooded lead acid, and lithium batteries.
- Automatic temperature compensation adjusts charging to ambient temperature fluctuations.
- Low-line voltage compensation helps maintain a consistent charge below 120V input.
- Digitally microprocessor-based control includes automatic wake-up for dead 12V lithium batteries.
- Waterproof, shock-resistant, and vibration-resistant construction suits demanding onboard use.
- Battery equalization helps clean and protect lead acid batteries every time you plug in.
Considerations & Trade-offs
- Designed for 12V AGM, 12V flooded lead acid, and 12V lithium (LiFePO4) batteries, so it’s important to match the charger setting to the battery type in use.
- The 5-bank, 10-amp configuration is built for onboard charging, which makes it a more specialized setup than a simple single-battery charger.
- Low-line voltage compensation and temperature compensation help maintain charging consistency, but actual charging behavior still depends on ambient conditions and outlet voltage.
- Battery equalization is described for lead acid batteries, so that feature does not apply to lithium (LiFePO4) use.
Suggested Comparisons
- Onboard marine battery chargers
- Multi-bank battery chargers
- 12V lithium battery chargers
- AGM and flooded lead acid battery chargers
Suggested Accessories
- Onboard battery charger
- Battery maintenance charger
- Marine battery cables
- Battery terminal accessories
Frequently Asked Questions
What battery types can the MK-550 charge?
According to the product data, it supports 12V AGM, 12V flooded lead acid, and 12V lithium (LiFePO4) batteries.
Does this charger adjust for temperature or low outlet voltage?
Yes. The listed features include automatic temperature compensation and low-line voltage compensation to help maintain a consistent charge when ambient conditions or outlet voltage change.
Can it wake a lithium battery that has gone into standby?
The long description says the digitally microprocessor-based control can wake dead 12V lithium (LiFePO4) batteries from standby automatically.
Is the charger built for marine use?
The product data states that it has waterproof, shock-resistant, and vibration-resistant construction.
Does it include any battery maintenance function for lead acid batteries?
Yes. The long description says battery equalization cleans and protects your lead acid battery every time you plug in.