Epoch Batteries Dual-Output 12V/36V Marine DC-DC Charger CHG-DC-12V36V | Charge on the Run, 12V 10A + 36V 10A

Specifications

Brand: Epoch Batteries

Product: Dual-Output 12V/36V Marine DC-to-DC Charger | Charge on the Run

Model / SKU: CHG-DC-12V36V

Product type: Two-bank, non-isolated marine DC-to-DC battery charger

Charging banks: 2 independently operating output banks

Supported source systems: Compatible 12V or 24V starter-battery systems

Published DC input range: 13–30VDC

Unsupported input: 36V input batteries are not supported

12V start threshold: Above 13.8V

12V stop threshold: Below 13.0V

24V start threshold: Above 26.8V

24V stop threshold: Below 25.2V

12V output bank: 12V / 10A

36V output bank: 36V / 10A

Approximate nominal output power: 12V bank ≈120W; 36V bank ≈360W; aggregate ≈480W before conversion losses

12V output purpose: Separate 12V auxiliary, house, electronics, or secondary battery

36V output purpose: Separate compatible 36V auxiliary or trolling-motor battery

Same-battery loopback: Do not connect the 12V output back to the starter battery used as the input source

12V bank chemistry modes: 12V LiFePO4, 12V lead-acid, or 12V AGM

36V bank chemistry modes: 36V LiFePO4, 36V lead-acid, or 36V AGM

Mode selection: Separate front-panel MODE controls for the output banks

Mode-change rule: Select before charging; disconnect that bank's output ring terminals before changing chemistry

Lithium BMS activation: Select LiFePO4 and hold the applicable MODE control for approximately 3 seconds

Cold-weather lithium charging: Do not charge below 0°C / 32°F unless the battery has approved heating or manufacturer permission

Automatic source detection: Starts and stops according to detected 12V or 24V source voltage

Idle / hibernation: Enters hibernation after approximately 20 minutes at idle while monitoring input voltage

Manual power control: Hold MODE for 6 seconds to turn off; short-press MODE to wake

Normal charge indication: POWER solid green; CHARGING solid red

Full-charge indication: POWER and CHARGING LEDs solid green

Other indicators: Selected battery chemistry and reverse-polarity status

Input connection: Pre-wired ring-terminal leads; red positive and black negative

12V output connection: Pre-wired ring-terminal leads; red positive and black negative

36V output connection: Pre-wired ring-terminal leads; red positive and black negative

Connection groups: One input pair plus one 12V output pair plus one 36V output pair

Isolation: Non-isolated

Wiring boundary: Red and black leads within the same cable jacket must connect to the same battery

Grounding warning: A black lead must never be connected to a terminal carrying red leads

Network requirement: No published NMEA 2000 or proprietary data-network requirement

Short-circuit protection: Yes

Reverse-connection protection: Yes

Overcharge protection: Yes

Overtemperature protection: Yes

Housing: Aluminum housing with bottom aluminum cooling plate

Cooling: Waterproof cooling fan; not fanless

12V bank replacement fuse: 15A

36V bank replacement fuse: 15A

Ingress protection: IP67; enclosure filled with pure epoxy resin

Working temperature: -20°C to 40°C / -4°F to 104°F

Nominal working temperature: 25°C / 77°F

Product dimensions: 250 × 149 × 68mm / approximately 9.84 × 5.87 × 2.68 in

Mounting holes: 6.5mm

Recommended fasteners: M6 screws appropriate for the mounting surface

Required clearance: More than 30mm; do not block the fan or cooling surfaces

Alternator compatibility: Verify rated output and available charging current after all existing boat loads

Source-side demand: Can be substantial because the two outputs total approximately 480W before conversion losses

Series-built 36V bank: Follow the battery manufacturer's approved charging and balancing method

Dockside charging: DC-to-DC charging supplements but does not replace a full AC recharge

Ingress caution: Do not intentionally submerge; protect ring terminals, cables, and connections

System protection: Use appropriate fusing, disconnects, conductor sizing, grounding, and marine installation practices

CHG-DC-36V / CHG-DC-12V36V User Manual

Epoch Batteries Limited Warranty

Warranty Period
2-year limited warranty on Epoch-branded chargers (Epoch general warranty terms)

Epoch Batteries-branded products are covered against qualifying defects in materials and workmanship for the applicable warranty period, subject to Epoch's model-specific remedy schedule and the terms of its warranty policy. Epoch-branded chargers carry a 2-year limited warranty and accessories (such as fuel gauges and voltage reducers) a 1-year limited warranty, from the original purchase date.

Registration
Register your battery with Epoch within 90 days of purchase for full warranty coverage. If it is not registered within that time, the warranty period begins from the battery's original manufacturing date. Proof of ownership is required for any claim, and coverage is non-transferable and applies only to the original purchaser.

Remedy
After inspection and testing, Epoch will provide the applicable remedy for a qualifying manufacturing defect: an approved repair, a replacement, or a comparable-product offer according to the model's schedule. Typical repair turnaround is 3–10 business days once the product is received.

Exclusions
Coverage may be denied when a failure is caused by misuse, improper handling, installation or storage, or use outside the product's specifications. Examples include an unsecured battery; loose, corroded or improperly connected terminals; series or parallel connections beyond the manufacturer's recommendations; reverse polarity or short circuits; impact, fire or water submersion; storage above 140°F or below -40°F; prolonged storage fully discharged or batteries left uncharged for more than three months; poor crimps, undersized cables or damaged wiring; opened, modified or tampered products; and use in applications the battery was not designed for, including repeated engine starting on non-cranking models.

Obtaining Warranty Service
Start a claim through the Epoch Batteries Warranty Portal with your model and serial number, proof of purchase, a description of the issue and supporting photos or videos. If approved, Epoch provides an RMA number and packing instructions. Do not ship a product without a valid RMA. The customer arranges and pays for shipment to Epoch, packaged in compliance with lithium battery shipping rules. Epoch Batteries can be reached at 1-888-501-1846 or support@epochbatteries.com.

Visit Epoch's Warranty Page to review the full warranty terms.

Shipping is typically through freight carriers and the actual shipping time is contingent on your location and the specific warehouse dispatching your order. Please allow for a 1-3 business day processing period before shipment, and an estimated delivery time of up to 7 business days. Your confirmation email will include delivery details and we will send you a tracking number as soon as one is available. If you ordered several separate items, you may receive multiple tracking numbers. Once the item has been shipped, the freight service will contact you to coordinate the date and time of delivery. If you require any special accommodations during delivery please let us know as soon as possible and let the delivery company know when arranging the appointment.

Typically, orders will be dropped off either curbside or outside your front door or garage. It is your responsibility to bring the order inside or to its final destination and to remove any existing items.

Depending on the item, parts may be shipped in multiple boxes, and assembly may be required. When your order is delivered, please check that you have all pieces of the item and that nothing is damaged. If your order is damaged during transit and external damage is visible, note the damage immediately, write it on the delivery documents, take photos and/or videos, and refuse shipment. If there is no visible external damage, accept the package but note “subject to concealed damage” on the delivery documents. Any damage upon delivery needs to be reported within 24 hours of delivery or you may not be eligible for a refund. For additional information on submitting claims, as well as incorrect item exchanges, and replacements, please see our Refund Policy.

For more information about shipping, please visit our complete Shipping Policy.

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