4-Bank 12V Marine Battery Charger | 10A Per Bank

Four batteries · Four smart banks · One onboard charger 4-Bank Onboard Marine Lithium Battery Charger | 10A Per Bank (40A Total) The all-in-one bass boat charging solution for four individual 12V batteries—including 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 display—giving tournament anglers fast overnight charging without carrying four separate chargers. Charge the entire four-battery boat from one AC connection. CHG-4BAY-12V10A 4 Independent banks 10A Per bank 40A Aggregate nominal 12V Each output IP67 Enclosure rating M8 Ring terminals Smart onboard charging for every battery Four independent banks One battery per output Selectable chemistry LiFePO4, lead-acid, AGM Lithium activation Wake compatible BMS LED status Mode and charge visibility Automatic shutdown Stops after full charge Built-in protection Short, reverse, heat, no-load The Ultimate Charging Solution for 36V Trolling Systems 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. True 10 Amps Per Bank 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. Individual Charging for Series-Bank Balance 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. LiFePO4, Lead-Acid, or AGM Per Bank Each output has its own MODE control. Select Lithium, lead-acid, or AGM for the battery attached to that bank before charging—ideal for boats that use lithium trolling batteries with a separate AGM cranking battery. Built for Demanding Marine Environments Epoxy-filled ingress protection, active cooling, and bolted battery connections. IP67 Epoxy-Filled Enclosure 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. Active Aluminum Cooling System 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. Secure Onboard Connections 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. Easy Onboard Installation 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. Compatible use cases Bass boats, trolling-motor banks, cranking batteries, and four-battery marine systems. ✓ Three 12V trolling-motor batteries plus one 12V cranking or house battery, subject to approved series-charging instructions. ✓ Four separate 12V LiFePO4 batteries in bass boats, fishing boats, pontoons, and center consoles. ✓ Mixed 12V battery chemistries when each bank is individually set to LiFePO4, lead-acid, or AGM mode. ✓ Tournament fishing setups that need overnight charging from one onboard AC connection. ✓ 12V marine electronics, house, cranking, trolling, auxiliary, or generator batteries within each battery's charge limits. ✓ Permanent onboard installations with protected AC power, secure mounting, ventilation clearance, and inspected cabling. ✓ Compatible sleeping lithium batteries that support charger-based BMS activation. Every output is 12V only Do not connect one charger bank across an entire native 24V, 36V, or 48V battery. Every red/black pair must connect to one compatible 12V battery, with the mode selected to match that battery's chemistry. Charger features Fast per-bank charging, mixed-chemistry flexibility, BMS activation, active cooling, and circuit protection. Four independent 12V outputs Charge and maintain up to four individual 12V batteries from one onboard unit. True 10A bank rating Each output is rated at 10A rather than sharing one low-current output among all four batteries. 40A aggregate nominal capacity Four 10A outputs provide up to 40A combined nominal charging when all banks operate at full rating. Individual chemistry selection Set every bank independently for LiFePO4, lead-acid, or AGM with its own MODE control. Per-battery series-bank charging Each 12V battery in an approved series system receives its own charger connection, helping maintain battery-to-battery balance. Lithium BMS activation Hold the MODE button for three to five seconds after selecting Lithium mode. Automatic full-charge shutdown Charging stops after a bank reaches the charger's full-charge condition. At-a-glance indicators Shows AC power, selected battery type, charging status, and full-charge status for each bank. IP67 epoxy-filled enclosure High ingress protection for correctly installed onboard environments. Active thermal management Aluminum housing, bottom cooling plate, and a temperature-controlled waterproof fan. M8 ring-terminal leads Bolted red-positive and black-negative connections resist accidental disconnection. Circuit protection Includes short-circuit, reverse-connection, overcharge, overtemperature, and no-load protection. Complete the onboard battery system Pair the charger with compatible batteries, mounting, shore-power equipment, and DC protection. Epoch 12V Trolling-Motor Batteries Use one charger bank per compatible 12V battery in an approved 24V, 36V, or 48V series system. Epoch Cranking or House Battery Use the fourth bank for a compatible 12V starting, electronics, or house battery. Marine AC Extension Cord Use a grounded, correctly rated outdoor or marine cord and a protected 120V outlet when additional reach is required. Battery Trays and Hold-Downs Secure every battery for trailering, rough water, and high-speed operation. Battery Disconnects and Fusing The charger does not replace the boat's battery switches, source protection, or branch overcurrent protection. Technical Specifications 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 105–125VAC 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 × 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 3–5 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 × 245 × 99mm / approximately 11.18 × 9.65 × 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 2-year limited warranty: free repair or replacement 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 Charging and marine safety note 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 Four batteries. Four independently managed 12V banks. One onboard charger sends a dedicated 12V / 10A charging channel to each battery—up to 40A aggregate nominal capacity when all four banks operate at their full individual ratings. 4Independent banks 12VEach battery bank 10AMaximum per bank 40AAggregate nominal AC INPUT 105–125V 60 Hz 4 BANKS ACTIVE ONBOARD CHARGER Independent mode · status · regulation BANK 1 BANK 2 BANK 3 BANK 4 INDEPENDENT BANK 1 12V / 10A one battery INDEPENDENT BANK 2 12V / 10A one battery INDEPENDENT BANK 3 12V / 10A one battery INDEPENDENT BANK 4 12V / 10A one battery AC input105–125V60 Hz Four-bank onboardChargerIndependent mode, status, and regulation 4 separate outputs Bank 112V / 10AOne 12V battery Bank 212V / 10AOne 12V battery Bank 312V / 10AOne 12V battery Bank 412V / 10AOne 12V battery Supported nominal battery voltage Voltage by bank Shared scale: 0–12V Bank 1 12V Bank 2 12V Bank 3 12V Bank 4 12V 036912V Maximum rated current Current by bank Shared scale: 0–10A Bank 1 10A Bank 2 10A Bank 3 10A Bank 4 10A 02.557.510A Aggregate nominal capacity 4 × 10A = 40A total That is four separate 10A channels—not one combinable 40A output. 110A 210A 310A 410A 40A aggregate nominal Illustrative independent behavior Each bank follows the battery connected to it. Example only—not measured charger data 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 “independent” matters. Bank 1Active charge 10A example Bank 2Tapering ≈6A example Bank 3Charge complete 0A stopped Bank 4Active charge ≈8A example 01 One bank per batteryEach red/black output pair connects to one compatible individual 12V battery. 02 Mode selected per bankLiFePO₄, AGM, or lead-acid can be selected independently for every channel. 03 Current is not dividedEvery bank is rated at 10A; one battery’s state does not turn the others into shared outputs. 04 Independent completionEach channel can taper and stop when its own battery reaches the charger’s full-charge condition. The bar charts compare published nominal ratings, not a measured voltage-versus-time charging curve. “12V” 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. Frequently asked questions Epoch 4-Bank Marine Charger FAQs Common questions about 36V trolling systems, charging time, mixed battery chemistries, onboard mounting, cooling, and lithium activation. Can I use this 4-bank charger with a 36V trolling-motor system? 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. How long will 10A per bank take to recharge my batteries? 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. Does each bank really provide 10A at the same time? 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. Can I leave the charger connected after the batteries are full? 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. Can I connect two charger banks to one battery for 20A charging? 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. Can I charge one AGM starting battery and three LiFePO4 trolling batteries? 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. Is this charger fanless? 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. Can I permanently mount it in a marine battery compartment? 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. Can it wake a lithium battery whose BMS has shut down? 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. Can I charge a native 24V, 36V, or 48V battery with one bank? 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. Can I charge LiFePO4 batteries below freezing? 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.