Supported nominal battery voltage
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Four batteries ¡ Four smart banks ¡ One onboard charger
The all-in-one bass boat charging solution for four individual 12V batteriesâincluding common three-battery trolling systems plus a cranking or house battery.
The Epoch 4-bank lithium charger delivers four independent 12V / 10A outputs from one permanently mounted marine unit. Each bank has its own LiFePO4, lead-acid, or AGM setting, BMS activation control, and charge-status displayâgiving tournament anglers fast overnight charging without carrying four separate chargers.
Charge three individual 12V trolling batteries and one 12V cranking battery from one onboard unit.
A common tournament-bass configuration uses three 12V batteries to create a 36V trolling-motor bank, plus a fourth 12V battery for engine starting, electronics, livewells, and accessories. This 4-bank onboard charger gives every battery its own 10A charging channel.
Connect one red/black output pair to each individual 12V battery. Because the live product page does not publish a formal galvanic-isolation rating, confirm the supplied charger manual and each battery manufacturer's approved method before charging a series-connected bank with the interconnect jumpers left in place.
Each independent channel is rated at 10A. With four banks charging at full output, the charger provides up to 40A of aggregate nominal charging capacity instead of dividing one small current rating between every battery.
Connecting a charger bank to each 12V battery helps reduce battery-to-battery imbalance within an approved 24V, 36V, or 48V series string. The charger fills each battery individually; internal cell balancing is still handled by each battery's BMS.
Each output has its own MODE control. Select Lithium, lead-acid, or AGM for the battery attached to that bank before chargingâideal for boats that use lithium trolling batteries with a separate AGM cranking battery.
Epoxy-filled ingress protection, active cooling, and bolted battery connections.
The charger enclosure is filled with pure epoxy resin for IP67 ingress protection. Keep the AC plug and battery ring terminals dry and protected, and do not submerge the charger or use it with a wet plug.
This model is not fanless. The aluminum housing and bottom cooling plate work with a temperature-controlled waterproof fan. Maintain more than 30mm of clearance and never block the fan or heat-dissipation surfaces.
Pre-wired M8 ring terminals bolt directly to each battery. Permanent connections reduce the risk of loose temporary clips, while rigid mounting helps limit movement and cable fatigue during trailering and rough-water operation.
Mount once, connect one output to each battery, select every chemistry, and charge the boat through one AC cord.
Use the 6.5mm mounting holes and appropriate M6 fasteners to secure the charger to a rigid surface. Maintain the required cooling clearance, protect all leads from abrasion, connect red to battery positive and black to negative, then select the correct mode for each bank before energizing AC power.
Battery type cannot be changed while a bank is charging. Disconnect that bank's DC ring terminals before changing its selected mode.
Bass boats, trolling-motor banks, cranking batteries, and four-battery marine systems.
Fast per-bank charging, mixed-chemistry flexibility, BMS activation, active cooling, and circuit protection.
Pair the charger with compatible batteries, mounting, shore-power equipment, and DC protection.
Exact output, input, chemistry, connection, cooling, protection, and mounting details.
| Identification | |
|---|---|
| Brand | Epoch Batteries |
| Product | 4-Bank 12V Marine Battery Charger | 10A Per Bank |
| Model / SKU | CHG-4BAY-12V10A |
| Product type | Four-bank onboard marine battery charger with pre-wired M8 ring terminals |
| Charging banks | 4 independently operating 12V banks |
| AC Input | |
| Input voltage | 105â125VAC |
| Input frequency | 60Hz |
| AC connection | Integrated grounded AC cord and North American plug |
| Input limitation | Not a universal 120/240V charger |
| DC Outputs | |
| Number of outputs | 4 |
| Bank voltage | 12V per bank |
| Bank current rating | 10A per bank |
| Aggregate nominal bank rating | 4 Ă 10A = 40A when all banks deliver full rated current |
| Battery connection rule | One red/black output pair connects to one individual 12V battery |
| Output connectors | M8 ring terminals; red positive and black negative/chassis |
| Replacement fuse | 15A for each 12V / 10A output |
| Battery Compatibility and Controls | |
| Supported battery voltage | 12V batteries only on every bank |
| Selectable chemistries | LiFePO4, lead-acid, or AGM, selected independently per bank |
| Mode control | Dedicated MODE control for each charging bank |
| Changing battery type | Cannot be changed while that bank is charging; disconnect its DC output before changing mode |
| Lithium BMS activation | Select Lithium mode, then hold MODE for approximately 3â5 seconds |
| Cold-weather lithium charging | Do not charge below 0°C / 32°F unless the battery has approved heating or manufacturer permission |
| Indicators and Charge Behavior | |
| AC power indication | Yes |
| Battery-type indication | Yes, individually by bank |
| Charging indication | Red |
| Fully charged indication | Green |
| Full-charge behavior | Automatically shuts down charging after the battery reaches full charge |
| No-load behavior | No normal charging output when no compatible battery is connected |
| Construction and Cooling | |
| Ingress protection | IP67 enclosure |
| Sealing method | Filled with pure epoxy resin |
| Housing | Aluminum housing with bottom aluminum cooling plate |
| Cooling | Temperature-controlled waterproof cooling fan; not fanless |
| Marine-use boundary | Do not submerge; keep AC plug and ring terminals dry and protected |
| Protection | |
| Short-circuit protection | Yes |
| Reverse-connection protection | Yes |
| Overcharge protection | Yes |
| Overtemperature protection | Yes |
| No-load protection | Yes |
| Wrong-voltage limitation | Protection features do not permit use on a native 24V, 36V, or 48V battery |
| Environmental and Mechanical | |
| Working temperature | -20°C to 40°C / -4°F to 104°F |
| Nominal working temperature | 25°C / 77°F |
| Product dimensions | 284 Ă 245 Ă 99mm / approximately 11.18 Ă 9.65 Ă 3.90 in |
| Mounting-hole diameter | 6.5mm |
| Recommended mounting hardware | M6 screws appropriate for the mounting surface |
| Required clearance | More than 30mm; do not obstruct the fan or heat-dissipation surfaces |
| Published weight | Not listed on the current product page |
| Published warranty term | Not listed on the current product page |
| Series-System Use | |
| Common 36V application | Three separate 12V batteries in series, with one charger bank connected to each battery |
| Fourth-bank application | One separate 12V cranking, starting, house, or electronics battery |
| Series-jumper guidance | Verify the supplied charger manual and battery manufacturer's approved in-place charging method |
| Balance clarification | The charger can charge each 12V battery individually; internal cell balancing remains the battery BMS's function |
| Doubling banks on one battery | Not recommended |
Verify voltage, polarity, chemistry, temperature, charge-current limits, and series-charging instructions before connecting AC power.
Disconnect AC before servicing battery leads. Never charge a frozen or damaged battery, never place conductive tools across terminals, and do not use the charger with a wet AC plug. Protection features reduce risk but do not make incorrect battery voltage, unsupported chemistry, or poor installation safe.
Four-bank output visualizer
One onboard charger sends a dedicated 12V / 10A charging channel to each batteryâup to 40A aggregate nominal capacity when all four banks operate at their full individual ratings.
Supported nominal battery voltage
Maximum rated current
Aggregate nominal capacity
Illustrative independent behavior
At the same moment, one channel can be delivering its full rated current, another can be tapering, a third can be complete, and the fourth can still be charging. The hypothetical snapshot below shows why âindependentâ matters.
Each red/black output pair connects to one compatible individual 12V battery.
LiFePOâ, AGM, or lead-acid can be selected independently for every channel.
Every bank is rated at 10A; one batteryâs state does not turn the others into shared outputs.
Each channel can taper and stop when its own battery reaches the chargerâs full-charge condition.
The bar charts compare published nominal ratings, not a measured voltage-versus-time charging curve. â12Vâ identifies the supported nominal battery class; actual charging behavior varies with the selected chemistry, battery state of charge, temperature, and BMS behavior. The current values in the independent-behavior snapshot are deliberately hypothetical.
Common questions about 36V trolling systems, charging time, mixed battery chemistries, onboard mounting, cooling, and lithium activation.
Yes, when the 36V system is made from three compatible 12V batteries and each charger bank is connected to one individual 12V battery. The fourth charger bank can serve a separate 12V cranking or house battery. Epoch describes the outputs as independent, but the live page does not publish a formal galvanic-isolation specification; confirm the supplied charger manual and each battery manufacturer's series-charging instructions before leaving series jumpers connected.
A basic estimate is battery capacity divided by 10A. A 50Ah battery may need about five hours of bulk charging, while a 100Ah battery may need about ten hours. Real charging time is normally longer because current tapers near full charge and depends on starting state of charge, temperature, battery condition, balancing, and the selected chemistry profile.
Epoch rates each of the four independent outputs at 12V and 10A. That represents up to 40A of aggregate nominal charging capacity when all four banks are operating at their full individual ratings. Actual current can taper independently as each battery approaches full charge.
The published charging logic automatically shuts down a bank after its battery reaches the charger's full-charge condition, and the indicator changes from red to green. For long unattended storage, follow the supplied charger manual and every battery manufacturer's storage guidance, inspect the installation periodically, and isolate the system when required.
No. Each charger bank should be connected to one individual 12V battery. Combining two smart outputs on one battery can cause the channels to interfere with each other's sensing and charging logic. Use a correctly rated single-bank charger when a battery requires more than 10A.
Yes, provided every battery is 12V and each charger bank is set to the chemistry connected to that bank. Each output has its own MODE control for LiFePO4, lead-acid, or AGM. Battery type cannot be changed while that bank is charging; disconnect the DC ring terminals before changing the mode.
No. The charger uses an aluminum housing and bottom cooling plate together with a temperature-controlled waterproof cooling fan. Keep the fan and heat-dissipation surfaces unobstructed and maintain the published mounting clearance.
Yes. It is an onboard charger with an IP67 epoxy-filled enclosure, 6.5mm mounting holes, and recommended M6 mounting hardware. Maintain more than 30mm of clearance and protect the AC plug and battery ring terminals from rain, snow, standing water, and physical damage. Epoch specifically says not to submerge the charger or use it with a wet AC plug.
Yes, for compatible deeply discharged LiFePO4 batteries. Select Lithium mode on the relevant bank and hold its MODE button for approximately three to five seconds. BMS activation cannot repair a damaged, frozen, or otherwise unsafe battery.
No. Every charger output is a 12V / 10A bank intended for one compatible 12V battery. The charger can support a higher-voltage system only when that system consists of individual 12V batteries and the battery manufacturer permits in-place multi-bank charging.
Do not charge LiFePO4 below 0°C / 32°F unless the battery has an approved internal heating system or its manufacturer explicitly permits below-freezing charging. The charger's operating-temperature rating does not override the battery's low-temperature charge limit.