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Epoch Batteries
36V 100Ah LiFePO4 Lithium Battery (3.84kWh)
$1,899.00
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36V trolling motor battery
Epoch 36V 100Ah Marine Lithium Battery: The Ultimate Trolling Motor Powerhouse
A 36V 100Ah marine lithium battery with 3.84kWh of LiFePO4 power for serious trolling motor runtime.
The Epoch 36V 100Ah Marine Lithium Battery is a high-capacity 36V trolling motor battery, 36V lithium battery for boat upgrades, and deep cycle marine battery 36V solution for anglers who want long runtime without managing three separate 12V lead-acid batteries. Built with 3.84kWh (3,840Wh) of nominal stored energy at 38.4V, an IP67 waterproof enclosure, internal heating for cold-weather charging, Bluetooth monitoring, an included 10-segment battery meter, and an advanced BMS, it powers compatible 36V trolling motors and other 36V deep-cycle systems.
36V
System voltage
100Ah
Capacity
3.84kWh
Stored energy
120A
Continuous output
IP67
Waterproof
75 lb
Approx. weight
Built to go further
11-year limited warranty 3 yrs free replacement
U.S.-based support Help when you need it
Veteran owned Mission-focused brand
Designed and engineered U.S. product design
Advanced BMS Built-in protection
LiFePO4 safety Stable lithium chemistry
Drop the Weight: Replace Three Heavy 12V Batteries
One 38.4V LiFePO4 battery can replace a three-battery 12V lead-acid trolling motor bank, with far less weight.
Swapping a daisy-chain of three 12V lead-acid batteries for one 36V 100Ah marine lithium battery simplifies your boat’s electrical layout, opens up valuable compartment space, and removes substantial weight from the hull. That means less clutter, fewer interconnect cables, and a cleaner installation for modern fishing boats.
This battery measures 20 in L × 10.25 in W × 11 in H (508 × 260.4 × 279.4 mm) and weighs about 75 lb (34.0 kg). It is not a drop-in replacement for every lead-acid or AGM installation: before installation, confirm your tray space, hold-down system, cable size and routing, terminal clearance, overcurrent protection, charger profile, and trolling motor manufacturer requirements.
Power Your 36V Trolling Motor
3.84kWh lithium storage for Minn Kota, Garmin, Lowrance, and other compatible 36V trolling motor systems.
With 100Ah of capacity, 3.84kWh of nominal stored energy, and 120A continuous discharge (200A for up to 60 seconds), this 36V deep cycle lithium battery is built for anglers who spend long days on the water. LiFePO4 voltage stays nearly flat across most of the discharge, so your trolling motor sees steady voltage through most of the battery’s usable capacity. For planning, Epoch uses 80% of nominal energy, about 3,072Wh (80Ah): roughly 8 hours at a 10A load or 6.1 hours at 500W.
Use it with compatible 36V trolling motors from brands such as Minn Kota, Garmin, and Lowrance when voltage, current draw, fuse protection, charger profile, and manufacturer battery requirements match. For extended runtime, matched batteries may be wired in parallel up to Epoch’s stated limit of four batteries.
Built-in heating for all-season fishing
A heated marine lithium battery for cold-weather charging support.
In cold weather, the internal heater warms the cells before charging begins, and the BMS’s low-temperature charge protection allows charging only within the cells’ 0°C to 55°C (32°F to 131°F) range, so the battery is rated to charge from -20°C to 55°C (-4°F to 131°F) with heating. While the cells warm, the app may show little or no charge current; leave the charger connected and switched on.
IP67 waterproof and rugged marine construction
Dust-tight and rated for temporary immersion.
The IP67 waterproof enclosure is dust-tight and protected against temporary immersion up to 1 meter for 30 minutes, which suits trolling motor compartments, fishing boats, and other wet marine locations. It is not rated for water jets, pressure washing, or long-term submersion: mount it securely and not where water can pool around the battery.
Smart Bluetooth app monitoring
A Bluetooth trolling motor battery monitor in your pocket.
Built-in Bluetooth connects to the free Epoch Li-Ion app for iOS and Android, so you can check state of charge, voltage, current, temperature, cycle data, and battery status from your smartphone. The app’s state of charge is a calculated estimate; the included 10-segment battery meter shows the remaining charge in 10% steps and sounds an alarm at 10%.
Compatible applications
Marine trolling motors, fishing boats, and compatible 36V deep-cycle power systems.
- ✓ 36V trolling motor systems where voltage and current requirements match.
- ✓ Minn Kota, Garmin, Lowrance, and other compatible 36V marine trolling motor platforms.
- ✓ Bass boats, fishing boats, pontoons, skiffs, aluminum boats, bay boats, and compatible marine setups.
- ✓ Replacement for three 12V lead-acid trolling motor batteries in compatible 36V banks.
- ✓ Marine house power and electronics in compatible 36V systems, with suitable conversion for 12V devices.
- ✓ Cold-weather fishing setups where a heated marine lithium battery provides charging support.
- ✓ Parallel battery banks up to four matched batteries for expanded amp-hour capacity.
- ✓ Solar, off-grid, cabin, and backup systems built around compatible 36V charging and inverter equipment.
- ✓ Boat installations where the 20 in × 10.25 in × 11 in case and M8 terminals fit properly.
Battery features
Marine lithium performance with heating, Bluetooth visibility, and IP67 protection.
36V trolling motor batterySingle-battery 36V platform for compatible marine trolling motor systems.
36V 100Ah marine lithium batteryStores 3.84kWh (3,840Wh) of nominal energy at 38.4V for extended runtime on the water.
Native 36VOne 38.4V battery can replace a three-battery 12V lead-acid trolling motor bank, with far less weight.
120A continuous discharge50A (0.5C) recommended. Size loads, conductors, and overcurrent protection to the 120A continuous rating.
200A peak dischargeDelivers short-duration output for up to 60 seconds when system demands increase.
100A continuous chargeAccepts up to 100A from compatible 36V LiFePO4 charging equipment; 50A (0.5C) recommended.
150A peak chargeUp to 150A charge current for up to 10 seconds.
Internal heatingWarms the cells before charging in freezing weather; rated to charge from -20°C (-4°F) with heating.
Bluetooth battery monitorConnect to the Epoch Li-Ion app to review state of charge, voltage, current, temperature, cycle data, and battery status.
IP67 waterproof ratingDust-tight and rated for temporary immersion up to 1 meter for 30 minutes. Not for water jets or pressure washing.
Advanced BMSHelps protect against overcharge, over-discharge, over-current, short circuit, and temperature extremes.
3,500+ cycle lifeLong-lasting LiFePO4 performance for demanding marine and deep-cycle applications.
10-segment battery meterIncluded. Shows the remaining charge in 10% steps and sounds an alarm when the charge reaches 10%.
Compatible chargers and accessories
Use dedicated 36V LiFePO4 charging equipment.
✓ Epoch 36V 15A LiFePO4 battery charger (CHG-36V15A), the recommended charger: roughly 6.7–7 hours from fully discharged, plus taper and balancing time.
✓ Programmable 36V LiFePO4-compatible marine chargers.
✓ A DC-to-DC charger programmed for LiFePO4 for alternator charging (highly recommended).
✓ Properly sized marine cabling, fusing, hold-downs, and terminal hardware.
Specifications
Full technical details, dimensions, weight, current ratings, and 36V charging settings.
IP67 waterproof marine protection
Built for spray, rain, wet decks, and harsh boat environments.
The IP67-rated enclosure is dust-tight and protected against temporary immersion up to 1 meter for 30 minutes, which suits trolling motor compartments, fishing boats, and other wet marine locations. It is not rated for water jets, pressure washing, or long-term submersion. For best results, keep terminals clean and protected, secure the battery properly, and do not mount it where water can pool around the case.
Why upgrade to Epoch LiFePO4?
More usable energy. Less maintenance. More confidence on the water.
LiFePO4 technology provides stable voltage output, fast charging capability, long service life, and maintenance-free operation. Compared with traditional lead-acid trolling motor banks, this lightweight 36V battery simplifies installation while delivering efficient usable energy, smart monitoring, and rugged marine protection.
Fitment and charging note
Verify your boat, charger, and trolling motor before installation.
Always confirm compartment dimensions, cable clearance, M8 terminal compatibility, charger compatibility, fuse sizing, trolling motor current requirements, and manufacturer guidance before installation. Install the main fuse or DC-rated breaker as close as practical to the battery positive terminal, and secure the battery upright with a tray, strap, or bracket rated for its 75 lb weight. Use a lithium-compatible 36V charger or programmable charging system set to Epoch’s recommended parameters. For parallel banks of up to four, use matched B36100A-A batteries of similar age, condition, and firmware, each fully charged and at the same state of charge before connecting.
Frequently asked questions
36V 100Ah Marine Lithium Battery FAQs
Common questions about trolling motor runtime, boat fitment, charging, waterproofing, Bluetooth monitoring, and parallel battery banks.
How long will this 36V 100Ah battery run a trolling motor?
It depends on how much power your motor draws. For planning, Epoch uses 80% of nominal energy: about 3,072Wh (80Ah) per battery. That works out to roughly 8 hours at a 10A load, 12.3 hours at 250W, or 6.1 hours at 500W (runtime ≈ usable Wh ÷ load W, or usable Ah ÷ load A). Real runtime varies with thrust setting, boat weight, wind, current, temperature, battery age, and duty cycle. For longer runtime, up to four matched batteries can run in parallel.
Can I use my existing 12V marine charger to charge this battery?
No. This is a 36V lithium battery, so it must be charged with a 36V LiFePO4 charger or a programmable charger set to Epoch’s LiFePO4 settings. A 12V charger, or a lead-acid, AGM, or gel charger, cannot charge this battery correctly. Epoch’s 36V 15A LiFePO4 charger (CHG-36V15A) is the recommended charger; it charges a fully discharged battery in roughly 6.7–7 hours, plus taper and balancing time.
Will this 36V battery fit in my boat's current battery compartment?
One battery replaces a three-battery 12V lead-acid bank, but you should measure your compartment before ordering. The case measures 20 in L × 10.25 in W × 11 in H (508 × 260.4 × 279.4 mm) and weighs about 75 lb (34.0 kg). It is not a drop-in replacement for every lead-acid or AGM installation: confirm tray space, hold-down straps, terminal clearance, cable size and routing, overcurrent protection, and charger compatibility before installation.
Can I wire two of these 36V 100Ah batteries together for even more power?
Yes, in parallel. Up to four matched B36100A-A batteries can be wired in parallel: two make a 36V 200Ah (7.68kWh) bank and four a 400Ah (15.36kWh) bank. Use batteries of similar age, condition, and firmware, charge each one fully before connecting, keep the cables equal in length and gauge, and fuse each battery branch. Do not wire this model in series.
Does this replace three 12V trolling motor batteries?
Yes, in compatible 36V systems one 38.4V battery can replace a traditional bank of three 12V lead-acid trolling motor batteries. It simplifies wiring, frees up compartment space, and significantly reduces boat weight. It is not a drop-in replacement for every installation, so always confirm your trolling motor voltage, charger profile, cable size, fuse protection, and manufacturer requirements before replacing an existing bank.
Will it work with Minn Kota, Garmin, or Lowrance trolling motors?
This battery is designed for compatible 36V trolling motor systems, including many setups using Minn Kota, Garmin, Lowrance, and other major marine trolling motor brands. Confirm that your motor is a 36V model and that its current draw, wiring, fuse protection, and manufacturer battery requirements match before installation.
Is this an IP67 waterproof 36V battery?
Yes. This model has an IP67 waterproof enclosure: dust-tight and protected against temporary immersion up to 1 meter for 30 minutes. It is not rated for water jets, pressure washing, or long-term submersion, so install it in a secure battery compartment where water cannot pool around the case.
Does the Bluetooth trolling motor battery monitor show state of charge?
Yes. Built-in Bluetooth connects to the free Epoch Li-Ion app so you can view state of charge, voltage, current, temperature, cycle data, and battery status on an iOS or Android device. The app’s state of charge is a calculated estimate, so check voltage, current, and any alarms along with it. The included 10-segment battery meter also shows the remaining charge in 10% steps.
How does the internal heating work?
In cold weather, the internal heater warms the cells before charging begins. The BMS checks cell temperature and allows charging only within the cells’ 0°C to 55°C (32°F to 131°F) range, so the battery is rated to charge from -20°C to 55°C (-4°F to 131°F) with heating. While the cells warm, the app may show little or no charge current. This can be normal: leave the charger connected and switched on, and allow more time in colder conditions.
Can this battery be used for engine starting?
No. This is a 36V deep cycle marine battery for trolling motor and compatible 36V power applications. It is not designed for engine cranking, outboard starting, or golf carts. Use a dedicated cranking-rated battery for engine starting applications.