Lithium Marine Batteries

Power Your Adventures with Premium Lithium Marine Batteries

Traditional lead-acid and AGM batteries add substantial weight to a boat, require careful charging and can deliver less voltage as the day progresses. Flooded batteries also bring water checks, acid residue and corrosion concerns into already cramped compartments. Epoch lithium marine batteries provide a cleaner, lighter LiFePO4 power solution for boaters who want dependable energy without the routine maintenance of a flooded lead-acid bank.

Built for demanding marine use, Epoch batteries combine lithium iron phosphate chemistry with an integrated Battery Management System and rugged, model-specific enclosures. They are suited to applications ranging from tournament bass boats, center consoles and flats boats to kayaks, sailboats, cruising yachts and offshore vessels.

Whether you need a lithium trolling motor battery , a marine lithium house battery or an approved lithium marine starting battery , begin by matching the battery to the voltage, current demand, capacity, charger and physical space of the complete system. For anglers comparing the best lithium battery for bass boats, the answer is not simply the largest option. It is the correctly specified battery for the motor, electronics and runtime you expect.

The Tournament Advantage: Why Make the Switch to Lithium?

A deep cycle lithium marine battery can change how a boat performs and how confidently you use power throughout the day:

• Less weight and better boat performance: Epoch marine batteries can weigh up to 70% less than comparable lead-acid banks. Removing weight from the bow or stern may improve holeshot, handling, fuel efficiency and shallow-water draft, depending on the hull, load and battery location. It can also free valuable compartment capacity for tackle, safety equipment or other onboard systems.
• Consistent trolling power: Lead-acid voltage declines as the bank discharges, which can make a trolling motor feel weaker late in the day. LiFePO4 has a flatter discharge curve, helping a compatible trolling motor maintain steadier thrust through most of the battery's usable charge, even when wind, current and vegetation increase demand.
• More usable stored energy: Lead-acid batteries are often sized around a shallower depth of discharge because repeatedly draining them too far can shorten service life. Applicable Epoch lithium batteries support much deeper cycling, up to the limit specified for the individual model, so more of the rated capacity can be available for trolling, sonar, livewells and accessories.
• No watering or acid cleanup: A maintenance-free marine lithium battery has no electrolyte level to check and no acid to spill inside a tight bilge or rigging compartment. Normal marine inspections are still important, including checking terminals, cable torque, hold-downs and corrosion protection.
• Faster recovery between trips: A compatible LiFePO4 charger can recharge lithium efficiently, reducing downtime between tournament days, weekend outings or offshore runs. Always use charging equipment and settings approved for the battery model and confirm compatibility with alternators, onboard chargers, solar controllers and DC-to-DC chargers.

Finding the Right Power: 12V, 24V, 36V and 48V Marine Systems

Voltage must match the equipment being powered. Never substitute a different-voltage battery without confirming that the trolling motor, electric propulsion system, charger, wiring, protection devices and connected electronics are designed for that voltage.

12V Lithium Marine Batteries

A 12V lithium marine battery is a versatile choice for many smaller trolling motors, kayaks and compact fishing boats. It can also serve as a dedicated house bank for fish finders, chartplotters, livewells, pumps, lights and marine audio. Choose amp-hour capacity by calculating the combined load and desired runtime rather than relying on boat size alone.

24V Lithium Marine Batteries

A 24V lithium trolling motor battery is commonly used on mid-sized bass boats, bay boats and other vessels with equipment designed for a 24V supply. Where voltage, capacity, discharge output, charger profile and fitment all match, one 24V battery can replace two 12V lead-acid batteries wired in series. This can reduce weight, free space and eliminate an interconnect cable from the bank.

36V Lithium Trolling Motor Batteries

A 36V lithium trolling motor battery is built for compatible high-thrust systems used by serious anglers and larger fishing boats. A single 36V pack can replace three 12V batteries in a traditional series bank when all specifications match, substantially simplifying wiring and reducing battery-compartment weight. Confirm the trolling motor manufacturer's voltage and current requirements before selecting capacity.

48V Marine Lithium Batteries

A 48V marine lithium battery is intended for properly engineered high-voltage applications, including compatible electric propulsion, advanced trolling systems and larger house or inverter installations. These systems require correctly rated controllers, chargers, cables, disconnects and overcurrent protection. Do not convert a lower-voltage system to 48V by changing the battery alone.

Cranking vs. Deep Cycle: Understanding the Difference

A deep-cycle battery is designed to supply steady energy over extended periods. Trolling motors, fish finders, livewells, navigation electronics, lighting and house loads typically belong on a deep-cycle bank. Capacity in amp-hours and watt-hours, continuous-discharge capability and expected runtime are central to choosing this type of battery.

A starting battery is designed to provide a brief, high-current burst to crank an engine. Do not use a standard deep-cycle lithium battery to start an outboard unless the product is specifically rated and approved for cranking service. The battery must satisfy the engine manufacturer's starting-current, charging-system and battery-type requirements, whether the outboard is made by Mercury, Yamaha, Suzuki or another manufacturer.

Epoch's dual-purpose lithium marine batteries are engineered to support both cranking and deep-cycle loads, using a BMS and internal architecture designed for high current. Before installation, verify the exact battery model against the outboard, alternator output, charger and accessory loads. A dual-purpose lithium marine battery rating does not make every battery universally compatible with every engine.

Built for the Harshest Marine Environments

Marine installations face vibration, humidity, spray, temperature swings and limited ventilation. Epoch offers batteries with model-specific IP ratings, including select IP67 waterproof and dust-tight models as well as IP65 and IP54 options. Check the individual product rating and install the battery in accordance with its manual. An IP rating does not replace secure mounting, correct cable protection or good saltwater-corrosion practices.

Select heated models use internal heating to warm the cells before charging in below-freezing conditions. This helps protect LiFePO4 cells during cold-weather charging for early-spring anglers, late-season boaters and vessels stored in northern climates. Heating capability and operating temperature ranges vary by model.

Bluetooth-equipped models let you view information such as state of charge, voltage, current, temperature and battery status from a compatible phone. Selected Elite and Pro Series batteries also support Victron communications for compatible larger marine house systems, giving cruisers and yacht owners a more integrated view of charging and energy use.

Every Epoch marine battery includes an advanced BMS that monitors the pack and provides model-specific protection against conditions such as overcharge, excessive discharge, overcurrent, short circuits and unsafe temperatures. Epoch marine batteries carry limited warranties of up to 11 years (6 years on the Eco Series), each starting with 3 or 5 years of free coverage depending on the series, then 40% off MSRP on a replacement battery. Compare voltage, capacity, output, IP rating, communications and warranty before choosing the right Epoch LiFePO4 marine battery for your boat.