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Essential Series
36V 50Ah Essential Series LiFePO4 Battery (1.92kWh)
€661.95
IP65BluetoothHeated
- 11-year warranty
- US-based support
- Available to ship today
Features at a glance
- IP65Weatherproof
Sealed against dust and driving rain.
- 4,000+Cycle life
Over 10 years at one full cycle a day.
- iOS + AndroidBluetooth app
Charge, voltage and temperature on your phone in the Epoch Li-Ion app.
- Advanced BMSProtection
Guards against overcharge, over-discharge, overcurrent and short circuit.
- Self-heatingCold weather
Warms its own cells so it can charge below freezing.
- LiFePO4Safest chemistry
Stable under extreme conditions. 11-year warranty.
- 36V 50Ah Essential Series LiFePO4 (1.92kWh): Premium deep cycle lithium power in a standard Group 31 footprint, engineered as a direct upgrade for trolling motors, marine, and off-grid systems.
- Heated 36V Lithium Power: Built-in internal heating allows for safe and efficient charging even in sub-zero and extreme cold-weather conditions.
- Smart Bluetooth Monitoring: Connect seamlessly to the free Epoch iOS and Android apps to track real-time capacity, voltage, and battery health.
- High-Performance Output: Delivers 100A maximum continuous discharge and a 130A peak discharge (up to 10 seconds) to easily handle demanding loads.
- Advanced Smart BMS Protection: Integrated Battery Management System automatically guards against over-charge, over-discharge, over-current, short circuits, and extreme high/low temperatures.
- IP65 Rated & Waterproof: Dust-tight and water-resistant enclosure built to withstand harsh marine, mobile, and outdoor environments.
- Expandable Capacity: Parallel expansion supports wiring up to 4 batteries together to drastically increase your total runtime.
- 4,000+ Cycle Life & Maintenance-Free: Exceptional drop-in replacement longevity requiring absolutely no watering, acid maintenance, or routine upkeep.
- 11-Year Manufacturer Warranty: Backed by an industry-leading warranty to guarantee long-term performance and peace of mind on the water.
Configuration
Cell Configuration: 12S
Chemistry: LiFePO4
Current
Ah Capacity: 50Ah
Max Continuous Discharge Amps: 100A
Max Charge Current Amps: 120A (10 Seconds)
Max Discharge Peak Current Amps: 130A (10 Seconds)
Series | Parallel: Max (1) in Series | Max (4) in Parallel
Voltage
Voltage: 36V
Max Charge Voltage: 43.8V
Operating Voltage Range: 30 - 43.8V
Temperature
Charge Temp Range: -20°C (-4°F) / 55°C (131°F) (with heating)
Discharge Temp Range: -20°C (-4°F) / 60°C (140°F)
Storage Temp: 0°C (32°F) / 35°C (95°F) (Max 12 Months)
Weight: 35 (LBS)
Dimensions
Length: 13.0 (inches)
Width: 6.8 (inches)
Height: 9.44 (inches)
To properly charge your Epoch Batteries, you will want to verify that any charging component in your system is capable of being programmed for the following specifications. Charging components can include, but are not limited to converters, inverter chargers, solar charge controllers, DC to DC chargers, etc.
Bulk/Absorption: 14.2V – 14.6V
Absorption Time: Two batteries in parallel connections require 30 minutes 200Ah
Float: 13.4V – 13.8V
Equalization: 14.4V/ Disabled
Temperature Compensation: 0/Disabled
Charge Rate: 50% of the battery or battery bank capacity
Battery Charge Temperature Range: 32°F (0°C) to 131°F (55°C)
Battery Discharge Temperature Range: -4°F (-20°C) to 140°F (60°C)
Cell Charge Temperature: 32°F (0°C) to 131°F (55°C)
Cell Discharge Temperature: -4°F (-20°C) to 140°F (60°C)
NOTE: Not all chargers are capable of multistage charging. If yours is not, you will want to verify it can be programmed for the Bulk/Absorption voltage and have the other items mentioned disabled if applicable. Consult your charger's manual or the manufacturer.
Epoch Li-Ion App
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Downloadable resources
Applications & use cases
- Marine house power (compatible 36V systems)
- Trolling motors
- Marine electronics and fish finders (with suitable conversion)
- Fishing kayaks and small boats
- Yachts and large cruising boats
- Electric outboards and marine propulsion support
- Off-grid solar systems
- Solar battery banks and inverter systems
- Cabins and remote power systems
- Ice fishing and portable sonar
- Commercial fleet and specialty power systems
36V trolling motor battery
Epoch 36V 50Ah Group 31 Marine Trolling Motor Battery
A lightweight 36V 50Ah lithium battery for anglers upgrading from heavy lead-acid trolling motor banks.
The Epoch 36V 50Ah Group 31 Marine Trolling Motor Battery is a compact 36V trolling motor battery, 36V 50Ah lithium battery, and Group 31 marine battery upgrade for anglers who want one lightweight 36V deep cycle lithium power source instead of three heavy 12V lead-acid batteries. Built with LiFePO4 chemistry, internal self-heating, Bluetooth battery monitoring, advanced BMS protection, and an IP65 weatherproof enclosure, it delivers 1.92kWh of clean marine power for compatible trolling motor systems.
36V
System voltage
50Ah
Capacity
1.92kWh
Stored energy
100A
Continuous output
IP65
Weatherproof
35 lb
Approx. weight
Built to go further
11-year warranty
Manufacturer coverage
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
The Ultimate Lightweight Drop-In Replacement
Replace three heavy 12V lead-acid batteries with one compact 36V deep cycle lithium battery.
This Epoch 36V 50Ah lithium battery simplifies a traditional 36V trolling motor setup by combining the power of a three-battery lead-acid bank into one maintenance-free LiFePO4 drop-in replacement. At approximately 35 lbs, it removes significant weight from the bow or battery compartment while freeing up valuable boat storage space.
The Group 31 marine footprint gives anglers a familiar fitment path: 13.0 in L × 6.8 in W × 9.44 in H. Always verify tray dimensions, hold-down straps, cable clearance, terminal orientation, and charger compatibility before replacing your current boat battery bank.
Power Your 36V Trolling Motor All Day
Efficient 36V marine lithium performance for fishing boats and trolling motor systems.
With 1.92kWh of stored energy, 100A continuous discharge capability, and a flat LiFePO4 discharge curve, this 36V trolling motor battery helps maintain strong voltage and consistent thrust through most of the battery’s usable capacity. That means less voltage sag compared with traditional lead-acid banks and more predictable power on the water.
This battery is designed for compatible 36V trolling motor platforms, including systems commonly used with Minn Kota, Garmin, and Lowrance trolling motors when voltage, current draw, charger profile, and manufacturer battery requirements match. For longer fishing days or heavier current and wind, add runtime by wiring matched 3650A-H batteries in parallel up to Epoch’s stated limits.
IP65 weatherproof and rugged marine construction
Dust-tight. Water-jet resistant. Built for demanding boat environments.
The sealed IP65 enclosure helps protect the battery from dust, rain, spray, and low-pressure water jets, giving anglers dependable protection for wet decks, splashes, and outdoor use. Shoppers comparing IP67 waterproof marine battery options should note that this model is IP65 rated, not submersible; install it where standing water cannot collect around the battery, terminals, or wiring.
Built-in heating and smart Bluetooth monitoring
Know your state of charge before the next cast.
Internal self-heating helps support cold-weather charging, while the Bluetooth battery monitor lets you check state of charge, voltage, current, and battery status through compatible iOS and Android apps. It is especially useful for anglers who want real-time battery confidence without guessing how much runtime remains.
Compatible applications
Marine trolling motors, fishing boats, and compatible 36V power systems.
- ✓ 36V trolling motor systems where voltage and current requirements match.
- ✓ Bass boats, fishing boats, pontoons, skiffs, aluminum boats, and compatible marine deep-cycle setups.
- ✓ Marine trolling systems from brands such as Minn Kota, Garmin, and Lowrance when manufacturer requirements are compatible.
- ✓ Replacement for three 12V lead-acid trolling motor batteries in compatible 36V banks.
- ✓ Group 31 marine battery tray installations where the 13.0 in × 6.8 in × 9.44 in case fits.
- ✓ Boat electronics and 36V auxiliary loads when system wiring, fusing, and current ratings are properly matched.
- ✓ Solar, off-grid, and backup energy systems built around compatible 36V charging and inverter equipment.
- ✓ Parallel battery banks up to four batteries for increased amp-hour capacity and longer runtime.
- ✓ Cold-weather fishing setups where internal heating and low-temperature charge protection are important.
Battery features
Smart marine lithium performance with cold-weather charging support.
36V trolling motor batterySingle-battery 36V platform for compatible marine trolling motor systems.
36V 50Ah lithium batteryDelivers 1.92kWh of stored energy with efficient LiFePO4 chemistry.
Group 31 marine footprintMeasures 13.0 in L × 6.8 in W × 9.44 in H for many Group 31 tray installations.
LiFePO4 drop-in replacementReplaces a traditional three-battery 12V lead-acid bank in compatible 36V systems.
100A continuous dischargeSupports demanding 36V loads while maintaining efficient lithium output.
130A peak dischargeDelivers short-duration peak output for up to 10 seconds.
Internal self-heatingBuilt-in heating helps support charging in cold conditions.
Bluetooth battery monitorCompatible app monitoring lets users view battery status from iOS and Android devices.
Advanced BMS protectionHelps protect against overcharge, over-discharge, over-current, short circuit, and temperature extremes.
IP65 weatherproof protectionDust-tight and water-resistant enclosure protection for marine and outdoor use.
4,000+ cycle lifeLong-lasting lithium performance compared with traditional lead-acid batteries.
Parallel expansionSupports up to four batteries in parallel for added 36V runtime capacity.
Lightweight 36V batteryAt approximately 35 lbs, it removes significant weight from a traditional lead-acid bank.
Maintenance-free designNo watering, acid maintenance, or routine lead-acid service required.
11-year warrantyBacked by Epoch’s manufacturer warranty coverage.
Compatible chargers and accessories
Recommended add-ons for a complete 36V marine installation.
✓
Epoch 36V 15A LiFePO4 battery charger.
✓
Battery tray for Epoch Essentials 3650A-H.
✓
Lithium-compatible 36V onboard marine charger.
✓
Properly sized marine-grade cable, fusing, disconnects, and terminal hardware.
Specifications
Full technical details, dimensions, weight, current ratings, and 36V charging settings.
IP65 marine weather protection
Dust-tight and water-resistant for demanding outdoor use.
The IP65-rated enclosure is designed for dust-tight protection and resistance to low-pressure water jets, making it suitable for many trolling motor, fishing boat, and outdoor marine installations. It should not be submerged, pressure washed, or mounted where water can pool around the battery or terminals.
Why upgrade to Epoch LiFePO4?
More usable energy. Less weight. Longer service life.
LiFePO4 technology provides stable voltage output, long cycle life, fast charging capability, and maintenance-free operation. Compared with traditional lead-acid trolling motor batteries, this Epoch lithium battery delivers efficient 36V energy storage in a lighter package while eliminating watering, acid maintenance, and routine lead-acid service.
Fitment and charging note
Verify your trolling motor, charger, and battery tray before installation.
Always confirm Group 31 tray fitment, cable clearance, terminal compatibility, trolling motor current requirements, charger compatibility, and system requirements before installation. Use a 36V LiFePO4-compatible marine charger, inverter charger, solar charge controller, or DC-to-DC charger programmed within Epoch’s recommended charging parameters. Do not wire this battery in series. For parallel battery banks, use matched batteries of the same model, age, capacity, and state of charge, and follow Epoch’s installation guidelines.
Frequently asked questions
36V 50Ah Group 31 Battery FAQs
Common questions about trolling motor runtime, fitment, charging, Bluetooth monitoring, and parallel expansion.
Will this battery fit in my current boat battery tray?
Yes. This battery is built around a Group 31 marine footprint and measures 13.0 in L × 6.8 in W × 9.44 in H. It is designed as a drop-in lithium upgrade for many existing trays and straps, but you should verify tray size, cable clearance, terminal orientation, and hold-down fitment before installation.
Is 50Ah enough to run a 36V trolling motor all day?
For many tournament and weekend anglers, 50Ah of usable LiFePO4 energy provides strong full-day runtime in moderate wind, current, and boat-load conditions. Runtime depends on thrust setting, motor efficiency, boat weight, wind, current, and how aggressively the motor is used. For extended runtime, multiple batteries can be wired in parallel.
Do I need a special charger for this 36V lithium battery?
Yes. Use a dedicated 36V LiFePO4-compatible marine charger or programmable lithium charger. Recommended settings include 42.6V–43.2V bulk/absorption voltage, float disabled preferred or set to 40.0V–40.8V, equalization disabled, and temperature compensation disabled.
Can I connect multiple 36V 50Ah batteries together?
Yes. This battery can be wired in parallel, up to four batteries, to increase capacity. For example, two batteries in parallel create a 36V 100Ah bank. Do not wire this model in series; it is limited to one battery in series and up to four in parallel.
Does this replace three 12V trolling motor batteries?
Yes, in compatible 36V systems this single 36V lithium battery can replace a traditional three-battery 12V lead-acid trolling motor bank. Confirm your trolling motor voltage, charger compatibility, tray dimensions, cable sizing, and manufacturer requirements before replacing an existing battery bank.
Is this battery waterproof?
This model is IP65 rated, which means it is dust-tight and protected against water jets for demanding outdoor and marine environments. It is not intended for submersion, pressure washing, or installation where standing water can collect around the battery, terminals, or wiring.
Does the Bluetooth app show state of charge?
Yes. Bluetooth monitoring allows compatible iOS and Android devices to view important battery data such as state of charge, voltage, current, and battery status, helping anglers track remaining power while on the water.
Does internal self-heating mean I can charge in freezing conditions?
The built-in heating system helps support charging in cold conditions when paired with a compatible charger. The battery also includes low-temperature charge protection through the BMS. Always follow Epoch charging guidance and avoid charging outside the approved temperature range.
Will it work with Minn Kota, Garmin, or Lowrance trolling motors?
This battery is designed for compatible 36V trolling motor systems, including systems commonly used with brands such as Minn Kota, Garmin, and Lowrance, when voltage and current requirements match. Always confirm your motor manufacturer’s battery requirements before installation.
Can this battery be used for engine starting?
No. This model is a 36V deep-cycle LiFePO4 battery for trolling motor and compatible 36V power applications. It is not designed for engine cranking or outboard starting applications.
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Additional Resources
Safety certifications & listings
Every mark below is a standard this battery has been tested against or a listing it carries. Here is what each one covers, in plain English.
IP65
Ingress protection
Dust-tight, and protected against water jets from any direction. Under IEC 60529 the first digit rates solids and the second rates water.
- Sealed against dust and dirt
- Rain, spray and hose-down
- Outdoor and marine mounting
IEC 60529, Degrees of protection provided by enclosures