Epoch 12V & 36V Onboard Marine Lithium Battery Charger
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Short Description:
Short Description:
Epoch 12V & 36V Onboard Marine Lithium Battery Charger – 2-Bank
The Epoch 12V and 36V onboard marine battery charger charges a 12V cranking or house battery and a native 36V LiFePO4 trolling-motor battery at the same time from a single AC plug. Its two independent banks (12V 15A and 36V 10A) replace separate chargers on bass boats and other mixed-voltage marine systems, and the IP67 epoxy-filled enclosure is made for permanent onboard installation. Explore more options in our lithium battery collection.
Key features
- Two independent banks: Bank 1 delivers 12V at 15A, Bank 2 delivers 36V at 10A, and both can charge simultaneously.
- Selectable 12V modes: LiFePO4, lead-acid or AGM via the front MODE button.
- Dedicated 36V lithium output: for a compatible native 36V LiFePO4 battery.
- Lithium BMS activation: hold the MODE button (12V bank) or the ACTIVATE button (36V bank) for about 3–5 seconds to wake a compatible sleeping lithium battery.
- Automatic full-charge shutdown: LED indicators change from red (charging) to green (fully charged).
- IP67 epoxy-filled construction: for correctly installed onboard marine environments.
- Active cooling: aluminum housing, bottom cooling plate and a temperature-controlled waterproof fan.
- Built-in protection: reverse-connection, short-circuit, no-load, overcharge and overtemperature protection.
- Secure connections: pre-wired M8 ring terminals (red positive, black negative) and six mounting points.
One charger for a mixed-voltage boat
Many bass boats combine a 12V cranking or house battery with a native 36V lithium trolling-motor battery. This charger manages the two systems independently, so you plug in once instead of juggling two portable chargers and loose clips in the bilge. Each bank has its own charging logic, status display, battery leads and activation control.
Built for the marine environment
The enclosure is filled with epoxy resin for IP67 ingress protection when correctly installed. This is not a fanless charger: the aluminum housing and cooling plate work together with a temperature-controlled waterproof fan, so keep more than 30 mm of clearance around the charger and never block the cooling surfaces or the fan. Inspect cables, glands, seals, mounting points and the AC connection regularly, because IP67 does not make damaged wiring or an unsafe installation acceptable.
Battery compatibility
The 12V lead must go only to a compatible 12V battery in the correct selected mode, and the 36V lead only to a compatible single 36V LiFePO4 battery. The 36V output is published for a native 36V LiFePO4 battery, so do not assume it will correctly balance three separate 12V batteries wired in series; for that, follow the battery manufacturer's instructions or use a multi-bank 12V charger. Do not use the charger on unsupported voltages, dry-cell batteries, frozen batteries or damaged batteries. Do not charge LiFePO4 below 0°C (32°F) unless the battery has approved internal heating or its manufacturer permits it.
Technical specifications
| Model / SKU | CHG-2BAY-12V36V |
| Type | Two-bank mixed-voltage onboard marine battery charger |
| AC input | 105–125 VAC, 60 Hz, integrated grounded AC cord and plug |
| Bank 1 output | 12 V / 15 A, selectable LiFePO4, lead-acid or AGM mode |
| Bank 2 output | 36 V / 10 A, compatible 36V LiFePO4 battery only |
| Replacement fuses | 20 A (12V bank), 15 A (36V bank) |
| Indicators | LEDs for AC power, 12V battery type and charge status (red = charging, green = full) |
| Output connections | M8 ring terminals (red positive, black negative) |
| Protection | Short-circuit, reverse-connection, overcharge, overtemperature and no-load protection |
| Enclosure | IP67, epoxy-filled, aluminum housing with bottom aluminum cooling plate |
| Cooling | Temperature-controlled waterproof fan |
| Working temperature | -20°C to 40°C (-4°F to 104°F) |
| Dimensions | 274 × 245 × 99 mm (about 10.79 × 9.65 × 3.90 in) |
| Mounting | 6.5 mm holes, M6 screws recommended, more than 30 mm clearance around the charger |
Charging time
To estimate charging time, divide the battery's amp-hour capacity by the bank's output (15 A for the 12V bank, 10 A for the 36V bank), then allow additional time for charge tapering, balancing, temperature and battery condition. Never exceed the battery manufacturer's maximum charge-current limit.
Installation notes
Mount the charger on a rigid surface with the supplied mounting points and keep the leads, glands, indicators and fan accessible. Connect the red ring terminals to battery positive and the black ones to negative, route each lead to its labeled battery voltage, and protect the cables from abrasion. Confirm polarity, voltage, battery chemistry and battery temperature before connecting the grounded AC supply. The charger does not replace the boat's battery disconnects, branch fusing or DC circuit protection. Disconnect AC before servicing battery connections, keep adequate ventilation around the batteries and the charger, and use a correctly rated grounded marine or outdoor extension cord if needed. Use qualified marine-electrical help where required.
Need help choosing a charger or batteries for your boat? Browse the full battery collection at M-Oceans or contact us for advice.