The MillerTech 12V 20A Marine Onboard Lithium Battery Charger (1220M) is designed to provide dependable charging for compatible 12V LiFePO4 lithium batteries. Built for permanent installation in fishing boats and other marine applications, this charger delivers a 20-amp charging output in a compact, IP65-rated housing.
Whether you're charging a dedicated marine electronics battery, trolling motor battery, or compatible lithium cranking battery, the MillerTech 1220M offers a convenient onboard charging solution without the need to remove your battery from the boat.
Key Features
-
20-Amp Charging Output: Delivers up to 20 amps of charging current for compatible 12V lithium batteries.
-
Designed for LiFePO4 Batteries: Provides the appropriate charging voltage for compatible 12V lithium iron phosphate batteries.
-
Permanent Onboard Installation: Designed to mount inside your boat for convenient battery charging.
-
IP65-Rated Housing: Protected against dust and water jets for marine environments.
-
Compact Design: Measures approximately 8" × 5.5" × 5" for installation in battery compartments and other suitable locations.
-
110V AC Input: Connects to a suitable shore-power or household AC power source.
-
Anderson Quick Connector: Features a 50A Anderson quick-connect connection.
-
3-Year Manufacturer Warranty: Backed by MillerTech.
Specifications
| Specification |
Details |
| Manufacturer |
MillerTech |
| Part Number |
1220M |
| Charger Type |
Marine Onboard Lithium Battery Charger |
| Battery Compatibility |
12V LiFePO4 Lithium |
| AC Input Voltage |
110V AC |
| DC Output Voltage |
14.5V |
| Maximum Output Current |
20A |
| Number of Charging Outputs |
1 |
| Protection Rating |
IP65 |
| Dimensions |
8" × 5.5" × 5" |
| Connector |
50A Anderson Quick Connector |
| Installation |
Permanent Onboard Mounting |
| Manufacturer Warranty |
3 Years |
Ideal for Marine Lithium Battery Systems
The MillerTech 1220M is a practical charging solution for compatible 12V lithium batteries used in:
-
Dedicated Garmin LiveScope and marine electronics battery systems
-
Lowrance ActiveTarget and Humminbird MEGA Live installations
-
12V trolling motor battery systems
-
Compatible lithium dual-purpose cranking batteries
-
Fishing boats, kayaks, and other marine applications
Its 20A charging output makes it suitable for a range of lithium battery capacities, provided the battery manufacturer permits the charging current.
Onboard Charging Convenience
The MillerTech 1220M is designed to remain mounted in your boat, allowing you to connect AC power when it's time to recharge.
The compact housing and IP65 protection rating make it well suited for permanent installation in an appropriate, protected marine compartment.
Battery Compatibility & Installation
This charger is designed for compatible 12V LiFePO4 lithium batteries.
Verify that your battery supports the charger's voltage and current specifications before use.
Important: This is a 12V lithium battery charger. It is not designed to directly charge a standalone 24V or 36V battery. It is also not intended to replace a multi-bank charger for independently charging multiple batteries.
Why Choose MillerTech?
The MillerTech 1220M combines a 20A lithium charging output, compact onboard design, and IP65-rated construction in a charger built for marine use. It's a convenient choice for keeping compatible 12V lithium trolling motor, electronics, and dual-purpose batteries charged between fishing trips.
