Epoch Dual-Output 12V/36V Marine DC-DC Charger
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Short Description:
Short Description:
Epoch Dual-Output 12V/36V Marine DC-DC Charger | Charge on the Run
The Epoch dual-output 12V/36V marine DC-to-DC charger turns engine-run time into managed charging for two auxiliary batteries. From one compatible 12V or 24V starter-battery system, it charges a separate 12V house or electronics battery (12V / 10A) and a compatible 36V trolling-motor battery (36V / 10A) at the same time. Automatic voltage sensing, selectable battery profiles, lithium BMS activation and an IP67 epoxy-filled enclosure make it a practical onboard solution for bass boats and mixed-voltage marine systems. Explore more options in our lithium battery collection.
Key features
- Two independent outputs: 12V / 10A and 36V / 10A, about 480 W aggregate nominal output before conversion losses (roughly 120 W on the 12V bank and 360 W on the 36V bank).
- 12V or 24V source: accepts a compatible starter-battery system within the 13–30 VDC range. 36V input batteries are not supported.
- Automatic start and stop: with a 12V source, charging starts above 13.8 V and stops below 13.0 V; with a 24V source, it starts above 26.8 V and stops below 25.2 V.
- Selectable chemistry per output: LiFePO4, lead-acid or AGM, chosen separately for the 12V and 36V banks with dedicated MODE buttons.
- Lithium BMS activation: select LiFePO4, then hold the applicable MODE button for about 3 seconds to wake a compatible sleeping lithium battery.
- Automatic hibernation: enters low-activity monitoring after about 20 minutes at idle. Hold MODE for 6 seconds to switch off and short-press to wake.
- LED status: shows power, selected chemistry, charging, full charge and polarity faults.
- IP67 epoxy-filled enclosure with an aluminum housing, cooling plate and waterproof fan.
- Built-in protection: short-circuit, reverse-connection, overcharge and overtemperature protection.
- 2-year limited warranty: free repair or replacement.
Charge on the run
Modern bass boats carry heavy 12V electronics loads and a high-capacity 36V trolling-motor battery. This charger bridges those auxiliary systems to a compatible 12V or 24V starter-battery source without connecting the batteries directly together, supplementing both banks whenever the source charging system is active. The starter battery remains the source side: the 12V output is for a separate auxiliary battery and must not be connected back to the battery used as the charger input. A DC-to-DC charger supplements but does not replace a full AC recharge at the dock.
Plan your alternator capacity
With both outputs at full rating, the source-side demand can be substantial, especially on a 12V system. Before installation, verify the alternator or charging-system rating, starting-battery condition, existing electronics load, cable sizing, fuse protection, voltage drop and available charging margin. The manufacturer does not list an input-current rating on the product page.
Non-isolated design: wiring matters
This is a non-isolated charger. The red and black conductors within the same cable jacket must connect to the same battery, and a black lead must never be connected to a terminal carrying red leads. Grounding, polarity, fusing and conductor routing must be planned before any battery is connected, and the supplied wiring diagram must be followed exactly. No NMEA 2000 or proprietary data network is required.
Built for the marine environment
The enclosure is filled with pure epoxy resin for IP67 ingress protection in correctly installed onboard use. Protect the leads, terminals and connections, and do not intentionally or permanently submerge the unit. This charger is not fanless: keep more than 30 mm of clearance and never block the fan or the cooling surfaces. Do not charge lithium batteries below 0°C (32°F) unless the battery has approved heating or its manufacturer permits it.
Technical specifications
| Model / SKU | CHG-DC-12V36V |
| Type | Two-bank, non-isolated marine DC-to-DC battery charger |
| Source input | Compatible 12V or 24V starter-battery system, 13–30 VDC (36V input not supported) |
| 12V source thresholds | Starts above 13.8 V, stops below 13.0 V |
| 24V source thresholds | Starts above 26.8 V, stops below 25.2 V |
| Output bank 1 | 12 V / 10 A (about 120 W), 12V LiFePO4, lead-acid or AGM mode |
| Output bank 2 | 36 V / 10 A (about 360 W), 36V LiFePO4, lead-acid or AGM mode |
| Aggregate output | About 480 W nominal before conversion losses |
| Connections | Pre-wired ring-terminal leads: one input pair, one 12V output pair, one 36V output pair |
| Replacement fuses | 15 A (12V bank), 15 A (36V bank) |
| Indicators | Normal charge: POWER solid green, CHARGING solid red; full charge: both solid green |
| Protection | Short-circuit, reverse-connection, overcharge and overtemperature protection |
| Enclosure | IP67, pure epoxy-filled, aluminum housing with bottom cooling plate and waterproof fan |
| Working temperature | -20°C to 40°C (-4°F to 104°F) |
| Dimensions | 250 × 149 × 68 mm (about 9.84 × 5.87 × 2.68 in) |
| Mounting | 6.5 mm holes, M6 screws recommended, more than 30 mm clearance |
| Warranty | 2-year limited warranty: free repair or replacement |
Installation notes
Connect the input pair to the starter-battery source, the 12V output pair to a separate 12V auxiliary battery and the 36V output pair to the compatible trolling-motor battery. Select the battery chemistry for each bank before charging; the mode cannot be changed while charging, so disconnect that bank's ring terminals first. Secure the charger to a rigid surface and protect every lead from vibration, abrasion, heat and sharp edges. Use appropriate fusing and disconnects, marine-grade cable and lugs sized for the current, run length and voltage drop, and follow the battery manufacturer's approved charging and balancing method for any 36V bank built from series-connected batteries. Disconnect and isolate all batteries before service, and never charge a frozen, damaged or unsupported battery.
Need help choosing a charger or batteries for your boat? Browse the full battery collection at M-Oceans or contact us for advice.