12V 300Ah Cranking & Deep Cycle Lithium Battery (Dual Purpose) - Pro Series
IP67BluetoothHeated
7
$1,599
In Stock
Bass Boat Batteries
Tournament-Winning Power: Premium Lithium Bass Boat Batteries
A modern bass boat is a demanding electrical platform. A 200- to 250-horsepower outboard, a high-thrust GPS trolling motor, dual livewells, shallow-water anchors, pumps, lighting and several large sonar displays can all compete for battery power. An aging lead-acid bank may feel adequate at launch, then lose voltage and reserve as the day progresses—exactly when you need dependable cranking, strong Spot-Lock performance and clear forward-facing sonar before weigh-in.
Epoch bass boat lithium batteries let anglers build the boat around the job each battery must perform. Native 24V and 36V LiFePO4 batteries provide deep-cycle power for compatible trolling motors. Cranking-capable dual-purpose batteries deliver the short, high-current burst required by approved outboards while also supporting house electronics. Dedicated 12V house batteries isolate graphs, sonar modules and pumps from the starting circuit when maximum system separation is the priority.
The best bass boat battery is therefore not one universal model. It is a correctly engineered combination of voltage, amp-hour capacity, continuous current, cranking capability, charging equipment, cable size and physical fitment. A full Epoch bass boat lithium upgrade can reduce stern weight, simplify rigging and provide more consistent voltage from first cast to final run back to the ramp.
The Performance Edge: Holeshot, Handling and All-Day Control
- Remove substantial battery weight: Four representative Group 31 lead-acid or AGM batteries weighing approximately 58.5 to 69 pounds each create a 234- to 276-pound bank. By comparison, an Epoch 36V 50Ah trolling battery weighs about 35 pounds and the Epoch 12V 172Ah dual-purpose battery weighs about 40 pounds. In a compatible two-battery setup, that is roughly 75 pounds total—a potential reduction of approximately 159 to 201 pounds before removed jumper cables and trays are considered. Always compare usable energy and current ratings as well as weight.
- Improve the boat's power-to-weight balance: Removing weight from the rear compartment may improve holeshot, shallow-water draft, handling and fuel efficiency, depending on hull design, engine height, propeller, load placement and setup. Lithium does not guarantee a specific speed increase, but it reduces the mass the hull and outboard must carry.
- Maintain steadier trolling-motor response: Lead-acid voltage declines as the bank discharges and drops further under load. LiFePO4 maintains a flatter discharge curve, helping a compatible trolling motor deliver more consistent thrust while holding GPS anchor position, working heavy vegetation or fighting wind and current.
- Use more of the rated capacity: Lead-acid banks are commonly planned around a conservative depth of discharge to protect cycle life. LiFePO4 supports much deeper cycling within the limits of the selected model, making a larger share of the rated watt-hours available for fishing-day loads.
12V LiFePO4 vs. Lead-Acid Voltage Discharge Curve
Stable voltage matters to trolling motors, sonar displays and pumps. The representative graph below shows why a 12V LiFePO4 battery can keep equipment operating more consistently: lithium stays near its normal working voltage through much of the cycle, while lead-acid voltage declines progressively as capacity is used.
Rigging Your Bass Boat: Cranking, House and Trolling Power
24V and 36V Trolling Motor Batteries
A native-voltage battery can replace multiple 12V batteries in a compatible trolling system. Epoch's 24V 60Ah Pro Series battery stores 1.54kWh, weighs about 30 pounds and supports 80A continuous output. The 36V 50Ah battery stores 1.92kWh, weighs about 35 pounds and supports 100A continuous output.
For heavier wind, current or longer tournament days, the 36V 100Ah battery provides 3.84kWh and 120A continuous output. One native 36V battery can replace three compatible 12V batteries, freeing space and eliminating two series jumpers.
Dual-Purpose Cranking Batteries
A standard deep-cycle lithium battery must not be assumed capable of starting a large outboard. Epoch's 12V 172Ah dual-purpose battery uses a cranking-capable BMS, providing 200A continuous output and a 1,000A five-second starting pulse in a 40-pound Group 31 footprint.
The larger 12V 300Ah Pro Series dual-purpose battery provides 300A continuous output, 1,000A for five seconds and 800A for ten seconds, plus 3.84kWh for electronics and house loads. Outboard, alternator, charger and wiring compatibility must be verified before installation.
Dedicated House Power for Electronics
A separate 12V house bank isolates forward-facing sonar, chartplotters, livewells, pumps, radios and lighting from engine-starting events. Epoch's fish finder battery collection includes compact 50Ah and 100Ah-class options for electronics-focused systems.
Extreme tournament rigs may benefit from a dedicated house battery even when a dual-purpose cranking battery has ample capacity. Separation improves fault isolation and lets the electronics bank be sized around actual daily amp-hour demand rather than starter requirements.
Why Cranking Amps Matter: Dual-Purpose vs. Deep-Cycle Lithium
Amp-hours describe stored capacity; they do not prove that a battery can start an engine. A starter motor demands a brief surge of hundreds of amps. A deep-cycle BMS is optimized for sustained accessory power and may disconnect when that surge exceeds its limit. The comparison below uses two current Epoch models to show the difference.
The key distinction: a deep-cycle battery is not inferior—it is designed for a different job. Use deep-cycle lithium for trolling motors and sustained house loads. Use a battery specifically approved for cranking when the circuit must start an outboard.
Flawless Power for Forward-Facing Sonar and Large Graphs
Forward-facing sonar systems, black boxes and multiple 10- to 16-inch displays need clean, dependable 12V power. When electronics share a weak starting battery, the voltage dip during engine cranking can cause displays to dim, reboot or lose network connections. Long wire runs, undersized conductors, loose terminals and overloaded distribution blocks can make the problem worse.
A properly sized Epoch house battery helps reduce that brownout risk by providing stable LiFePO4 voltage and isolating electronics from the starter circuit. Run the electronics through appropriately sized marine cable, individual fusing and a quality distribution block rather than stacking numerous small wires directly on a battery post. Size the bank by adding the actual current draw of every display, sonar module, livewell, pump and accessory, then multiplying by expected hours of use and adding a practical reserve.
A compatible dual-purpose battery can also support both the outboard and house loads, reducing battery count. For the most power-hungry tournament rigs, a separate house battery provides the greatest isolation and keeps the cranking reserve dedicated to getting back to weigh-in.
Built for Rough Water: The Epoch Advantage
- Rugged, model-specific enclosures: The current 12V 300Ah dual-purpose, 24V 60Ah and 36V 100Ah models are IP67 rated. The 12V 172Ah dual-purpose and 36V 50Ah batteries are IP65 rated. Check the exact model and mount every lightweight battery securely so pounding waves cannot create case movement or cable strain.
- Bluetooth monitoring: Current bass boat models provide app-based visibility into model-specific data such as state of charge, voltage, current, temperature and BMS status, helping anglers check available power before making a long run or committing to another spot.
- Cold-weather protection: Heating is included on several current trolling and Pro Series models, but not on every battery. The 12V 172Ah dual-purpose model has low-temperature charge protection without internal self-heating. Review the product specifications before planning winter storage or below-freezing charging.
- Advanced BMS protection: Each battery includes model-specific protection against conditions such as overcharge, excessive discharge, overcurrent, short circuits and unsafe temperatures. Correct cable sizing, terminal torque, fusing and charging equipment remain essential.
- 11-year manufacturer warranty: Every battery currently shown in Epoch's bass boat collection carries an 11-year warranty, with cycle life, output, environmental rating and communications varying by model.
- Safety-First EngineeringLiFePO4 chemistry with advanced BMS protection
- Up to 11 Year WarrantyCoverage varies by model
- U.S.-Based Expert Support
Side-by-side specs
Compare Bass Boat Batteries
Every battery in this collection uses LiFePO4 chemistry with a built-in battery management system (BMS). Compare stored energy, continuous output, weight, footprint, and price side by side.
11 models · Select a column heading to sort
| Model | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 50Ah | 0.64 kWh | 50A | 14 lbs | 9 × 5.6 × 8.3 | 22NF | 4,000+ | 11 yr | IP54 | Bluetooth: yes | Heated: no | Victron communications: no | Starting & cranking: no | |
| 100Ah | 1.28 kWh | 100A | 21 lbs | 10.3 × 6.8 × 9 | 24 | 4,500+ | 6 yr | IP54 | Bluetooth: no | Heated: no | Victron communications: no | Starting & cranking: no | |
| 105Ah | 1.34 kWh | 105A | 22.1 lbs | 10.3 × 6.8 × 9 | 24 | 4,000+ | 11 yr | IP54 | Bluetooth: yes | Heated: yes | Victron communications: no | Starting & cranking: no | |
| 60Ah | 1.54 kWh | 80A | 30 lbs | 12.3 × 6.8 × 9 | 27 | 6,000+ | 11 yr | IP67 | Bluetooth: yes | Heated: yes | Victron communications: yes | Starting & cranking: no | |
| 50Ah | 1.92 kWh | 100A | 35 lbs | 13 × 6.8 × 9.4 | 31 | 4,000+ | 11 yr | IP65 | Bluetooth: yes | Heated: yes | Victron communications: no | Starting & cranking: no | |
| 314Ah | 4.02 kWh | 250A | 57 lbs | 13.8 × 7.6 × 10 | 31 | 4,500+ | 6 yr | IP54 | Bluetooth: no | Heated: no | Victron communications: no | Starting & cranking: no | |
 | 172Ah | 2.20 kWh | 200A | 40 lbs | 12.9 × 6.2 × 8.5 | 31 | 4,000+ | 11 yr | IP65 | Bluetooth: yes | Heated: no | Victron communications: no | Starting & cranking: yes |
| 100Ah | 2.56 kWh | 120A | 48.5 lbs | 13 × 10.3 × 11 | Not available | 3,500+ | 11 yr | IP67 | Bluetooth: yes | Heated: yes | Victron communications: no | Starting & cranking: no |
Filter Products
Pro Series
Shop allDual-purpose batteries that start the engine and run the house loads.
- Engine cranking and deep-cycle power from one battery
- Drop-in upgrade for marine starting and house banks
- Bluetooth app monitoring
- Self-heating for sub-freezing charging
- IP67 waterproof and dustproof
- 6,000+ charge cycles
- 11-year warranty
Essential Series
Shop allOur core line of drop-in LiFePO4 batteries for marine, RV, golf cart and off-grid power.
- Standard BCI group sizes for drop-in lead-acid replacement
- The widest choice of voltages and capacities in our lineup
- Bluetooth app monitoring
- 4,000+ charge cycles
- 11-year warranty
12V 50Ah Essential Series LiFePO4 Battery (0.64kWh)
IP54Bluetooth
37
$299
In Stock
12V 105Ah Essential Series LiFePO4 Battery (1.34kWh)
IP54BluetoothHeated
161
$549
In Stock
12V 172Ah Cranking & Deep Cycle (Dual Purpose) LiFePO4 Battery
IP65Bluetooth
2
$899
In Stock
12V 300Ah Essential Series LiFePO4 Battery (3.84kWh)
IP54BluetoothHeated
230
$1,249
In Stock
36V 50Ah Essential Series LiFePO4 Battery (1.92kWh)
IP65BluetoothHeated
7
$749
In Stock
Eco Series
Shop allOur most affordable LiFePO4 line: proven lithium power without the extras.
- Standard Group 24 and Group 31 drop-in sizes
- Simple operation with no app required
- LiFePO4 chemistry with built-in BMS protection
- IP54 splash and dust resistant
- 4,500+ charge cycles
- 6-year warranty
Others
24V 100Ah LiFePO4 Battery (2.56kWh)
IP67BluetoothHeated
38
$1,199
Out of Stock
36V 100Ah LiFePO4 Lithium Battery (3.84kWh)
IP67BluetoothHeated
96
$1,899
In Stock
Heavy-Duty Power Distribution Block
1
$40
In Stock
Dual-Output 12V/36V Marine DC-DC Charger | Charge on the Run
$249
Out of Stock
12V to 36V Marine DC-to-DC Charger | Charge on the Run
$199
Out of Stock
4-Bank 12V Marine Battery Charger | 10A Per Bank
$399
Out of Stock
12V & 36V Onboard Marine Lithium Battery Charger
$349
Out of Stock
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FAQ
Frequently asked questions
The questions customers ask most before they order, answered in plain English.
What is the best lithium battery setup for a bass boat?
A strong bass boat lithium setup matches each battery to its specific job: a native 24V or 36V deep-cycle battery for the trolling motor, a cranking-rated dual-purpose battery for a compatible outboard, and an optional dedicated 12V house battery for demanding electronics. Final sizing depends on trolling motor current, daily amp-hour use, charging sources, available compartment space, and the boat manufacturer's requirements.
Can a standard deep-cycle lithium battery start a 250HP outboard?
Do not assume that it can. Standard deep-cycle lithium batteries may have sufficient stored energy but may not provide the high-current output required for starter-motor surge. Use an Epoch dual-purpose or cranking-rated battery only when its published output, alternator compatibility, and the outboard manufacturer's CCA or MCA requirements all match.
Can one 36V lithium battery replace three 12V trolling batteries?
Yes, in a compatible 36V trolling motor system. Match the native 36V battery's usable watt-hours, continuous current, peak current, charging profile, and physical dimensions to the motor and installation. A single 36V battery eliminates two series jumper connections and can free up two battery locations in the rigging compartment.
Should LiveScope and other sonar use a dedicated house battery?
A dedicated house battery is often beneficial for bass boats with multiple large displays, forward-facing sonar modules, livewells, pumps, and other electronics. It isolates those loads from the engine-cranking battery and can help reduce voltage-related reboot or flicker issues, provided the wiring, fusing, connectors, and battery capacity are also sized correctly.
How much weight can lithium remove from a bass boat?
Weight savings depend on the original battery bank and the lithium batteries selected. A representative four-battery Group 31 lead-acid or AGM setup can weigh roughly 234 to 276 pounds, while an Epoch 36V 50Ah trolling battery paired with a 12V 172Ah dual-purpose battery weighs about 75 pounds. Always confirm that the replacement batteries provide the required usable energy and current output before comparing weight alone.
Do I need new chargers when converting a bass boat to lithium?
Use charging equipment with a LiFePO4 charging profile approved for each battery voltage and model. Confirm compatibility for every onboard charger bank, alternator charging path, DC-to-DC charger, and shore charger, and disable incompatible lead-acid equalization or desulfation modes. A 12V charger cannot directly charge a native 24V or 36V lithium battery.
Why Epoch Makes Some of the Best Lithium Bass Boat Batteries
A modern bass boat is a complete electrical platform. A high-horsepower outboard, GPS trolling motor, forward-facing sonar, large displays, livewells, pumps, shallow-water anchors, lighting and accessories all depend on the batteries beneath the deck. A weak system can cause slow cranking, sonar reboots, fading trolling thrust and uncertainty before weigh-in.
Epoch offers purpose-built lithium bass boat batteries for compatible outboard cranking, dedicated electronics, 24V and 36V trolling motors, tournament systems and onboard charging. The best setup is not simply the battery with the highest amp-hour number; it gives each major load the correct voltage, capacity, current and charging profile.
Why Serious Anglers Choose Epoch Bass Boat Batteries
Consistent Power from Launch to Weigh-In
Lead-acid voltage declines as capacity is used and can sag further under heavy load. LiFePO4 maintains a flatter working voltage through most of its usable charge. That helps compatible trolling motors respond consistently, GPS anchoring make strong corrections and sonar displays receive stable power. Lithium does not increase equipment beyond its designed output; it helps deliver dependable voltage for more of the day.
More Usable Energy with Less Weight
LiFePO4 supports deeper routine cycling within each battery’s published limits, allowing more rated energy to serve fishing-day loads. One native 24V battery can replace two compatible 12V lead-acid trolling batteries, while one 36V battery can replace three. Removing battery cases, trays and series jumpers can reduce weight, free compartment space and simplify inspection.
Less Maintenance
Epoch LiFePO4 batteries need no electrolyte checks, distilled water, equalization charging or acid cleanup. Normal marine inspections still matter: check restraints, terminal torque, cables, fuses, breakers, chargers and compartment drainage regularly.
Build the Complete Bass Boat Battery System
A bass boat typically needs three power functions: starting the outboard, operating 12V electronics and accessories, and running a 24V or 36V trolling motor. One battery may perform more than one job, but every circuit must be evaluated separately.
Dual-Purpose Cranking Batteries
A standard deep-cycle lithium battery should not automatically be used to start an outboard. Starter motors demand a brief surge of hundreds of amps, and a deep-cycle BMS may disconnect if that surge exceeds its limit. Epoch’s cranking-capable dual-purpose batteries combine starting output with deep-cycle capacity for electronics and pumps.
The 12V 172Ah dual-purpose battery provides 200A continuous output and a 1,000A five-second pulse in a roughly 40-pound Group 31 case. The larger 12V 300Ah Pro Series provides 300A continuous output, a 1,000A five-second pulse and 3.84kWh for house loads. Always confirm outboard, alternator, charger, cable and protection compatibility before installation.
Dedicated 12V Electronics Power
A separate house battery isolates forward-facing sonar, chartplotters, networking modules, livewells, radios and lighting from engine-starting voltage dips. This can reduce display dimming and reboot risk while preserving dedicated cranking reserve. Size the battery by adding each device’s current draw, multiplying by expected hours of use and adding a practical reserve. Correct marine wiring and individual circuit protection remain essential.
Native 24V and 36V Trolling Batteries
For compatible 24V systems, Epoch offers a compact 60Ah Pro Series battery with 1.54kWh and 80A continuous output, plus a 100Ah option with 2.56kWh and 120A continuous output. For 36V systems, the 50Ah Group 31 battery provides 1.92kWh and 100A continuous output, while the 100Ah model provides 3.84kWh and 120A continuous output for longer tournament days.
The battery’s continuous rating must meet or exceed the trolling motor’s maximum current requirement. The breaker, plug, cables and connectors must support the same demand.
How to Size Lithium Bass Boat Batteries
- Match voltage: Use a 12V, 24V or 36V battery system that matches the connected equipment.
- Check current: Compare continuous and surge ratings with the trolling motor, starter and accessory loads. Amp-hours alone do not prove that a battery can crank an engine.
- Estimate energy: Calculate electronics use in amp-hours or watt-hours and estimate the trolling motor’s average—not maximum—current over a realistic day.
- Add reserve: Allow for wind, current, vegetation, frequent GPS anchoring, cold conditions and longer-than-planned tournament hours.
- Confirm fit: Measure the tray, case height, terminals, cable bend radius and service clearance before ordering.
Planning runtime in hours = battery amp-hours × 0.90 ÷ average motor current.
With a 10% reserve, a 50Ah battery supports approximately a 4.5A average for ten hours, while a 100Ah battery supports about 9A. These are planning estimates, not guaranteed runtimes. Boat weight, hull resistance, motor efficiency, speed, propeller condition, wind, current, vegetation, temperature and wiring loss all affect actual results.
For tournament use, size around difficult conditions rather than a perfect-weather estimate. It is usually better to return with reserve than to build a bank that works only when demand stays low.
Charging, Monitoring and Marine Protection
Use Lithium-Compatible Charging
Use a charger configured for the battery’s approved LiFePO4 profile. Epoch offers voltage-matched portable and onboard charging options, including equipment for mixed 12V and 36V layouts. Charge-on-the-run DC-to-DC equipment can replenish part of the trolling or electronics energy while the outboard operates, but it does not replace a full dockside recharge. Verify alternator capacity, cable size, fusing, voltage drop and grounding before installation.
Bluetooth, Heating and BMS Protection
Bluetooth-equipped models can display state of charge, voltage, current, temperature and BMS status through a compatible app. Select batteries include internal heating for below-freezing charging, while others provide low-temperature charge protection without self-heating. The integrated BMS adds model-specific protection against overcharge, excessive discharge, overcurrent, short circuits and unsafe temperatures.
Built for Rough Water
Current Epoch bass boat batteries use model-specific IP65 or IP67 enclosures. An IP rating does not make the complete installation waterproof; terminals, breakers, plugs and cables still need protection from water and corrosion. Secure every lightweight lithium battery in a correctly sized tray so rough water cannot cause case movement, cable strain or loose connections. Every battery currently shown in the bass boat collection carries an 11-year manufacturer warranty, while cycle life and features vary by model.
Find the Right Epoch Bass Boat Battery
The best bass boat battery system supports cranking, electronics and trolling power without asking one component to do a job it was not designed to perform. Compare Epoch lithium bass boat batteries by voltage, capacity, energy, output, weight, size, cranking capability, IP rating, heating and communications to build dependable tournament power.