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Minn Kota MK-315D Battery Charger
Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.
$249.99
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SKU: WX2*0203621
Overview
Built for anglers who depend on a reliable trolling setup, this onboard charger is designed to keep batteries ready between trips and help reduce downtime at the dock. Its digitally controlled, microprocessor-based design uses multi-stage charging with temperature compensation and auto shutoff to deliver a regulated charge while monitoring battery conditions. The unit is also described as waterproof and resistant to shock and vibration, with protection features that support use in demanding marine environments. For boaters who want a straightforward charging solution with configurable bank and amp options, it offers a practical fit without unnecessary complexity.
Why Hunters Choose the Minn Kota
Digitally Controlled
A microprocessor-based design
Multi-stage Charging
Automatic temperature compensation and auto
Enhanced Status
Codes help monitor charging progress
Waterproof, Shock,
Vibration-resistant construction for onboard use
Saltwater-tested Corrosion-resistant
Design
Key Features
- Digitally controlled onboard battery charger for trolling setups.
- Automatic temperature compensation and multi-stage charging help deliver a proper charge.
- Microprocessor-based design monitors temperature and state of charge for regulated charging.
- Enhanced status codes provide added charging information.
- Waterproof, shock-resistant, and vibration-resistant construction.
- Saltwater-tested and corrosion-resistant design.
- Requires 120V power for recharge.
Best Used For
- For anglers running a trolling motor setup who want an onboard charging solution matched to their battery banks.
- For boat owners needing automatic temperature compensation and multi-stage charging during routine recharging.
- For users who prefer digitally controlled charging with status codes and auto shutoff for simpler monitoring.
- For saltwater anglers needing a charger described as waterproof, shock-resistant, vibration-resistant, and corrosion-resistant.
- For boaters with 120V shore power available who want an onboard charger for overnight recharge cycles.
Specifications
| Amps | 15 |
|---|---|
| Auto Shutoff | Yes |
| Banks | 3 |
| Charging Speed | 2X faster charging |
| Charging Type | Multi-stage charging |
| Construction | Waterproof, shock, and vibration-resistant construction |
| Corrosion Resistance | Completely corrosion-resistant |
| Digitally Controlled | Yes |
| Fcc Compliance | FCC compliant |
| Microprocessor Based | Yes |
| Power Requirement | 120V |
| Protection | Short circuit, reverse polarity, and ignition protected |
| Saltwater Tested | Yes |
| Status Codes | Enhanced status codes |
| Temperature Compensation | Automatic temperature compensation |
| Ul Listing | UL listed to 1236 marine standards |
Pros
- Digitally controlled precision charging with a microprocessor-based design
- Multi-stage charging with automatic temperature compensation and auto shutoff
- Enhanced status codes help monitor charging progress
- Waterproof, shock, and vibration-resistant construction for onboard use
- Saltwater-tested and corrosion-resistant design
- UL listed to 1236 marine standards and FCC compliant
Considerations & Trade-offs
- Requires a 120V power source for recharge, so it is intended for locations where that power is available.
- The 3-bank design is suited to specific trolling-motor battery setups; matching bank count to your system is important before purchase.
- Charging speed depends on amps per bank, so the actual recharge time will vary with the configuration you choose.
- As an onboard charger, it is built for permanent-style installation rather than a portable grab-and-go charging solution.
Suggested Comparisons
- Onboard marine battery charger
- Trolling motor battery charger
- Multi-bank battery charger
- Saltwater-rated marine charger
Suggested Accessories
- Battery charger
- Marine power accessory
- Trolling motor accessory
- Battery maintenance accessory
Frequently Asked Questions
What battery systems is the Minn Kota MK-315D charger meant to match?
Minn Kota says charger bank count should match the trolling system: 12V systems need 1 bank, 24V systems need 2 banks, and 36V systems need 3 banks.
Does this charger use automatic charging control?
Yes. The product description says it uses a microprocessor-based, digitally controlled design with multi-stage charging, temperature control, and auto shutoff.
What kind of power does the MK-315D require?
It requires 120V power for recharge.
Is the charger built for marine use?
The listed features say it is waterproof, shock- and vibration-resistant, UL listed to 1236 marine standards, FCC compliant, and saltwater-tested with corrosion-resistant construction.
How fast does it charge?
The description says it offers 2X faster charging, but actual recharge time depends on the bank and amp setup. Minn Kota notes 4–6 hour recharging speed needs 10 amps per bank, while 10–12 hour recharging speed needs 5 or 6 amps per bank.