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Epoch Batteries 12V 50Ah (0.64kWh) Essential Series LiFePO4 Battery - Off Grid Stores
by Epoch Batteries

Epoch Batteries 12V 50Ah (0.64kWh) Essential Series LiFePO4 Battery

SKU: 1250A-ES
$299.00 - $299.00
$299.00
$299.00 - $299.00
$299.00
Availability:
in stock

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11-Year Limited Warranty

Off Grid Stores is an authorized retailer of Epoch Batteries products. Because of this, we pass on Epoch Batteries's manufacturer warranty to you.

Product Highlights
  • 12V 50Ah Essential Series LiFePO4 (0.64kWh): A compact 12.8V nominal, 50Ah Bluetooth deep-cycle battery that stores 0.64kWh (640Wh, nominal) in a compact case, for kayak trolling motors, marine electronics, small RV and van systems, portable solar and backup loads. It is not a drop-in replacement for every lead-acid installation: check tray fit, terminal clearance, cable size, overcurrent protection and charger profile first.
  • Compact & Lightweight: 9 × 6 × 8.5 in (229 × 152 × 216 mm) overall, terminals included, and 14.3 lb (6.5kg).
  • Output for Compact 12V Loads: 50A maximum continuous discharge and 170A for up to 3 seconds, for start-up surges only; keep the combined continuous load at or below 50A. Deep-cycle only: not cranking-rated, so not for engine starting.
  • 50A Charging: 50A maximum continuous charge current from all sources combined (25A recommended) and a 14.6V maximum charge voltage. Use a 12V LiFePO4 charge profile, such as the Epoch 12V 15A Lithium Battery Charger; for alternator charging, use a DC-to-DC charger.
  • No Internal Heating: The BMS blocks charging below 0°C (32°F) to protect the cells, and the battery can still discharge down to -20°C (-4°F). Let it warm into the 0°C to 55°C (32°F to 131°F) charging range before charging.
  • Bluetooth Monitoring: The free Epoch Pro app (iOS and Android) shows state of charge, voltage, current, temperature and BMS status, and one phone can monitor a multi-battery system (for example a three-battery 36V 50Ah trolling setup) from a single screen.
  • Advanced BMS Protection: Protects against overcharge, over-discharge, over-current, short circuit, and high and low temperature. Install a properly sized fuse or DC-rated breaker as close as practical to the positive terminal.
  • IP54 Rated: Dust-protected and splash-resistant for everyday mobile, marine and outdoor use. Not waterproof or submersible: do not submerge or pressure-wash it, or install it where standing water can collect.
  • Expandable: Up to 4 matched 1250A-ES batteries in series (24V, 36V or 48V system classes) and up to 4 in parallel (200Ah, 2.56kWh at 12V); the largest bank is 4S4P (51.2V, 200Ah, 10.24kWh).
  • 4,000+ Cycle Life & Low Maintenance: No watering, acid service or routine lead-acid maintenance; routine inspections keep it safe.
  • 11-Year Limited Warranty: 3 years of free replacement, then 40% off MSRP on a replacement battery through Year 11. Register within 90 days or keep your proof of purchase to confirm your coverage start date.
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Epoch Batteries 12V 50Ah (0.64kWh) Essential Series LiFePO4 Battery

Epoch Batteries 12V 50Ah (0.64kWh) Essential Series LiFePO4 Battery

Kayak, marine, and compact off-grid power

Epoch 12V 50Ah Essentials Lithium Battery: Perfect for Kayaks & Marine

A lightweight 12V 50Ah lithium battery for kayak trolling motors, marine fish finders, small off-grid power, and portable 12V systems.

The Epoch 12V 50Ah Essential Series LiFePO4 battery stores 640Wh of energy (0.64kWh nominal, at 12.8V) in a compact 14.3 lb case with a BCI Group 22NF footprint. Built for kayak anglers, small boaters, RV owners, and DIY power-box builders, this Bluetooth-enabled deep-cycle battery combines stable LiFePO4 output, smart BMS protection, IP54 weather resistance, and an 11-year limited warranty in one maintenance-free 12V lithium upgrade.

50Ah
Capacity
640Wh
Stored energy
14.3 lb
Lightweight
Bluetooth
App monitoring

Built to go further

11-year limited warranty3 yrs free replacement
Bluetooth appPhone-based visibility
IP54 ratedSplash resistant
Advanced BMSBuilt-in protection
4,000+ cyclesLong service life
LiFePO4 safetyStable lithium chemistry

Drop the weight, keep the power

A lightweight 12V deep-cycle battery for kayaks, small boats, and portable off-grid power.

Kayak anglers and small boaters have to protect every pound of payload. Replacing a heavy lead-acid battery with this compact 12V 50Ah lithium battery can dramatically reduce battery weight, improve handling, free up storage space, and make the battery easier to carry from truck to launch.

With 640Wh of stored LiFePO4 energy (Epoch plans runtime on about 512Wh, 80% of nominal) and a flat voltage curve, this battery is built for users who want reliable runtime without watering, acid fumes, or the voltage sag common with traditional lead-acid batteries.

Ideal for trolling motors & fish finders

LiFePO4 output helps maintain steady voltage for kayak trolling motors and sensitive marine electronics. Use it for compatible 12V trolling motors whose maximum current draw is at or below 50A continuous, Garmin, Lowrance, Humminbird, and similar fish finder setups, lighting, pumps, and onboard accessories where total current draw stays within the battery rating.

Smart Bluetooth app monitoring

Instead of cutting into a kayak dashboard for a physical gauge, monitor battery status from your smartphone. The free Epoch Pro app gives compatible iOS and Android users visibility into state of charge, voltage, current, temperature, and BMS status while on the water. If the app asks for a PIN, it is printed on the battery label or in the product documentation.

Spill-free, safe & compact

The enclosed LiFePO4 design contains no liquid acid, helping eliminate spill and fume concerns in portable power boxes or tight kayak compartments. Secure the battery properly, protect the terminals, and avoid submersion or standing water around the case.

Built for kayak, marine & small off-grid power

A compact LiFePO4 battery for compatible 12V auxiliary systems. It is not a drop-in replacement for every lead-acid installation.

  • ✓Kayak trolling motor battery applications where motor current stays within the 50A continuous rating.
  • ✓Marine fish finder battery setups for sonar, GPS, chartplotters, and onboard electronics.
  • ✓Small boats, skiffs, canoes, and compact marine accessory systems.
  • ✓Portable power boxes, camping power, field electronics, and small off-grid lithium battery projects.
  • ✓Small RV, camper, teardrop trailer, van, and overland auxiliary 12V systems.
  • ✓Compact solar storage for camping, cabins, trailers, and docks.
  • ✓12V lighting, pumps, fans, routers, radios and communications, and compatible backup equipment.
  • ✓24V, 36V, and 48V systems with up to four matched batteries in series, or 12V banks of up to four in parallel, with charging equipment rated for the full bank.

The perfect compact lithium upgrade: core features

Clean 12V lithium power for kayak anglers, marine electronics, portable solar, and small auxiliary systems.

640Wh stored energy50Ah at 12.8V nominal gives kayak anglers and small-system users a compact 0.64kWh power source; plan runtime on about 512Wh (80%).
Lightweight 12V deep cycleAt 14.3 lb, this battery is easy to carry, load, and secure in small watercraft and portable power boxes.
Bluetooth battery monitorUse the free Epoch Pro app to check state of charge, voltage, current, temperature, and BMS status from a compatible phone.
50A continuous outputSupports compact trolling motors, electronics, accessories, and auxiliary loads within the battery rating.
170A peak dischargeProvides short-duration peak output for up to 3 seconds for compatible startup loads.
Smart BMS protectionBuilt-in protection helps guard against overcharge, over-discharge, over-current, short circuit, and temperature extremes.
IP54 weather-resistant caseDust protected and splash resistant for everyday marine, RV, outdoor, and mobile use. Not waterproof or submersible.
BCI Group 22NF footprint9 × 5⅝ × 8¼ in (8⅝ in with terminal bolts). Not a drop-in for every lead-acid installation: check tray fit and terminal clearance first.
No liquid acidNo watering, acid spills, fumes, or terminal corrosion maintenance associated with flooded lead-acid batteries.
4,000+ cycle lifeLong-lasting lithium chemistry built for repeated deep-cycle service.
Series and parallel capableSupports up to 4 in series and up to 4 in parallel when properly matched and protected.
Low-temperature charge protectionNo internal heater: the BMS blocks charging below 0°C (32°F), and the battery can still discharge down to -20°C (-4°F).

Compatible chargers and accessories

Recommended add-ons for a complete kayak, marine, or portable power installation.

✓Epoch 12V 15A Lithium Battery Charger
✓LiFePO4-compatible solar charge controller, converter, inverter charger, or DC-to-DC charger
✓Properly sized battery box, hold-down strap, wiring, fuses, bus bars, and waterproof connectors

IP54 weather-resistant durability

Splash resistant protection for daily marine and outdoor use.

The IP54-rated enclosure is dust protected and splash resistant, making this battery suitable for everyday kayak, marine, RV, camping, and outdoor power use. It should not be submerged, pressure washed, or installed where standing water can collect around the battery.

Why upgrade to a 12V lithium kayak battery?

More usable energy, less maintenance, and easier handling.

LiFePO4 technology provides stable voltage output, long cycle life, fast charging capability, and maintenance-free operation. For kayak anglers and small boat owners, the biggest everyday benefits are simple: less weight to carry, less space taken up in the hull, no liquid acid, and better visibility through Bluetooth monitoring.

Fitment and charging note

Verify your kayak, boat, charger, and wiring before installation.

The 1250A-ES is not a drop-in replacement for every lead-acid installation. Always confirm compartment dimensions against the 9 in L × 5⅝ in W × 8¼ in H case (8⅝ in H with terminal bolts), battery box fitment, hold-down method, cable clearance, terminal protection, fuse sizing, charger compatibility, and total system current draw before installation. Mount the battery upright unless Epoch documentation for this model allows another orientation, install a fuse or DC-rated breaker as close as practical to the positive terminal, and tighten the terminals with the supplied hardware to the torque on the product labeling. Use a lithium-compatible charger programmed within Epoch’s recommended charging parameters. For series or parallel battery banks, use matched batteries of the same model, age, capacity, and state of charge, fully charge each one before connecting it, and follow Epoch’s installation guidelines.

Specifications:

Epoch Batteries 12V 50Ah (0.64kWh) Essential Series LiFePO4 Battery
Electrical & System
Model 1250A-ES Series
Series Essential Series
Battery Type Bluetooth deep cycle
Chemistry LiFePO4
Cell Configuration 4S
Nominal Voltage 12.8 V
Capacity 50 Ah
Stored Energy 0.64 kWh (640 Wh)
Operating Range 10.0–14.6 V
Max. Charge Voltage 14.6 V
Cycle Life 4,000+ cycles
Bluetooth Monitoring Epoch Pro app, iOS / Android
Self-Heating No
Discharge & Runtime
Max. Continuous Discharge 50 A
Peak Discharge 170 A for 3 seconds
Series / Parallel Max. 4S (48V class) / 4P
Runtime at 100 W / 500 W Load Approximately 5.1 hours / approximately 1.0 hour
Charge Settings
Max. Continuous Charge 50 A
Recommended Charge 25 A (50% of capacity)
Bulk / Absorption 14.2–14.6 V
Absorption Time 30 minutes per 200 Ah bank
Float 13.4–13.8 V (off preferred)
Re-bulk 13.2 V (if programmable)
Equalization Disabled
Temperature Compensation 0 mV/°C (disabled)
BMS High-Voltage Cutoff 14.6 V
SOC Recalibration 14.6 V
Temperature Specifications
Charge 32 to 131 °F
Discharge −4 to 140 °F
Storage 32 to 95 °F
Low-Temperature Charge Blocked below 32 °F
Mechanical Specifications
Dimensions 9 in × 5⅝ in× 8¼ in
Height with Terminal Bolts 8⅝ in
Metric Dimensions 9.02 in × 5.63 in × 8.27 in
Footprint BCI Group 22NF
Weight 14.3 lb
Terminals Bolt terminals
Enclosure IP54, not submersible
BMS Protections
Smart BMS Built-in management
Overcharge / Overdischarge Protected
Overcurrent / Short Circuit Protected
High / Low Temperature Disconnect protection
Compliance & Support
Compliance CE, RoHS
Transport UN 38.3
Support US-based technical support

Frequently Asked Questions

Is this 50Ah battery enough to run a kayak trolling motor?

Yes, for many compact 12V kayak trolling motor setups, when the motor’s maximum current draw is at or below 50A continuous and the wiring, fuse, controller, and charger are within the battery ratings. Use the motor manufacturer’s maximum current draw, not its average. The battery stores 640Wh (nominal); Epoch plans runtime on about 512Wh (80%), so a steady 10A draw runs for about 4 hours and a 500W load for about 1 hour. Real runtime depends on boat weight, speed setting, wind and current, and how often the motor runs at full throttle.

Can I use this battery to power my fish finder?

Yes. LiFePO4 batteries provide stable voltage output that is well suited for sensitive marine electronics. This makes the battery a clean power source for fish finders, sonar, GPS units, chartplotters, lighting, pumps, and other 12V accessories where the total current draw stays within the battery’s ratings.

How do I check the battery level while on the water?

This battery includes built-in Bluetooth monitoring. Open the free Epoch Pro app on a compatible iOS or Android device to view state of charge, voltage, current, temperature, and BMS status or protection alerts without installing a separate dashboard monitor. If the app asks for a PIN, use the one printed on the battery label or in the product documentation.

Can I mount this battery on its side in my kayak hull?

Install it upright unless Epoch documentation for this exact model allows another orientation. The LiFePO4 design contains no liquid acid, which eliminates the acid spill concerns of flooded lead-acid batteries, but the manual still calls for an upright installation. In kayak hulls and compact battery boxes, secure the battery so it cannot slide or tip, protect the terminals from spray, keep it out of bilge water, and leave clearance above the terminals for cables and covers.

Is this battery waterproof?

This model is rated IP54, meaning it is dust protected and splash resistant for everyday marine, mobile, and outdoor use. It should not be submerged, pressure washed, or installed where standing water can collect around the battery.

Do I need a special charger for this 12V lithium battery?

Use a 12V LiFePO4-compatible charger, such as the Epoch 12V 15A Lithium Battery Charger, or a converter, solar charge controller, inverter charger, or DC-to-DC charger programmed for LiFePO4. Recommended settings: 14.2V to 14.6V bulk/absorption, 30 minutes of absorption per 200Ah of bank capacity, float off (preferred) or 13.4V to 13.8V, re-bulk at 13.2V if programmable, and equalization and temperature compensation disabled. Charge at the recommended 25A and never more than 50A from all sources combined. Avoid lead-acid desulfation or equalization modes.

Can I charge this battery below freezing?

No. This model has no internal heater. Below 0°C (32°F) the battery management system blocks charging to protect the cells, though the battery can still discharge down to -20°C (-4°F). Move it somewhere warmer and let it come back into its 0°C to 55°C (32°F to 131°F) charging range before charging, and never bypass the protection.

Can I connect multiple 12V 50Ah batteries together?

Yes. This model supports up to 4 batteries in series (24V, 36V, or 48V system classes) and up to 4 in parallel (up to 200Ah at 12V); the largest bank is 4S4P, 16 batteries for 51.2V, 200Ah, and 10.24kWh. Use only matched 1250A-ES batteries of the same age, capacity, and state of charge, fully charge each one before connecting it into a bank, and use properly sized cables, fuses, bus bars, and charging equipment rated for the full bank voltage.

Can I use this battery to start a boat or vehicle engine?

No. This is a dedicated deep-cycle LiFePO4 battery, not a cranking battery. It is designed for sustained auxiliary loads such as trolling motors, marine electronics, lights, pumps, RV accessories, portable solar, and backup power. Use a cranking-rated battery for engine starting.

Product Documents:

Epoch Batteries 12V 50Ah (0.64kWh) Essential Series LiFePO4 Battery User Manual

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Epoch Batteries 12V 50Ah (0.64kWh) Essential Series LiFePO4 Battery Specification Sheet

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