Epoch 12V 334Ah Essential Series 12334A-H | LiFePO4 Battery (4.28kWh) | Heated, Bluetooth, Group 31

Specifications

Battery specifications

Brand: Epoch Batteries

Product name: Epoch 12V 334Ah Essential Series LiFePO4 Battery

Model / SKU: 12334A-H

Primary use: Deep-cycle RV, marine, van, solar, backup, and 12V house-power systems

Group size: BCI Group 31

Nominal voltage: 12.8V

Nominal capacity: 334Ah @ 0.2C

Stored energy: 4.28kWh / approx. 4,275Wh

Chemistry: LiFePO4 / Lithium iron phosphate

Cell configuration: 4S1P prismatic LiFePO4

Max continuous discharge: 200A

Recommended discharge current: 167A (0.5C)

Max continuous charge: 200A

Recommended charge current: 167A (0.5C)

Peak discharge: 400A for up to 3 seconds

Operating voltage range: 10.0V – 14.6V

Max charge voltage: 14.6V

Bulk / absorption voltage: 14.2V – 14.4V

Absorption end condition: Charge current ≤ C/20 (16.7A) or 15 minutes, whichever comes first

Float voltage: Disabled preferred, or 13.3V – 13.6V

Re-bulk voltage: 13.2V

Equalization: Disabled

Temperature compensation: 0mV/°C (off)

Charger temperature limit setting: 0°C to 55°C / 32°F to 131°F, unless the charger has approved cold-charge logic

BMS high-voltage cutoff: 14.6V

Series connection limit: Up to 4 batteries in series

Parallel connection limit: Up to 16 batteries in parallel

Maximum configuration: 4S16P; up to 5,344Ah with 16 matched batteries in parallel

Bluetooth monitoring: Yes — Epoch Li-Ion app (iOS and Android)

Bluetooth security PIN: Printed on the battery’s lid; can be changed in the app (Advanced Settings)

Current sensing: BMS-integrated shunt; 0.2A accuracy on discharge

Internal heating: Yes — for cold-weather charging

Charge temperature range: -20°C to 55°C / -4°F to 131°F with heating

Low-temperature charge protection: Charging disabled at 0°C / 32°F; resumes automatically at 5°C / 41°F

Heater activation: Charger connected and supplying at least 0.5A; powered by incoming charge current only, never stored battery energy

Heating system: Tested to -20°C / -4°F; rated for external ambient down to -40°C / -40°F

Discharge temperature range: -20°C to 60°C / -4°F to 140°F

Storage temperature: 0°C to 35°C / 32°F to 95°F recommended

Long-term storage: Charge to about 50% state of charge or higher; check at least every 3 months

Cycle life: 4,000+ cycles

IP rating: IP54 per IEC 60529 — dust-protected and splash-resistant; not submersible

Dimensions: 13.75 in L at base / 15.5 in at handles × 7.63 in W × 10.0 in H / 10.5 in with terminal bolts

Weight: 60 lb / 27.22 kg

Terminal: M8 threaded terminal

Terminal torque: 8–12 N·m (71–106 in-lb)

Warranty: 11-year limited manufacturer warranty

BMS protection: Overcharge, over-discharge, over-current, short circuit, high and low temperature

Cell-level certifications: UL 1642; IEC 62619 (the cells, not the complete battery)

Label markings: CE; RoHS; UN 38.3

In the Box

• 1 x Epoch 12V 334Ah Essential Series LiFePO4 battery (12334A-H)

Recommended Charging Settings

Use a lithium-compatible charger, inverter charger, solar charge controller, converter or DC-to-DC charger programmed within Epoch's recommended LiFePO4 charging settings.

• Maximum continuous charge current: 200A
• Recommended charge current: 167A
• Bulk/absorption: 14.2V-14.4V
• Absorption end condition: charge current at or below C/20 (16.7A) or 15 min, whichever comes first
• Float voltage: disabled (preferred) or 13.3V-13.6V
• Re-bulk: 13.2V
• Temperature compensation: 0 mV/°C (off)
• Equalization: disabled; do not use lead-acid equalization modes
• Charger temperature limit setting: 0°C (32°F) to 55°C (131°F), unless the charger has approved cold-charge logic
• BMS high voltage cutoff: 14.6V
• SoC recalibration: 14.6V
• For alternator charging, use a properly sized DC-to-DC charger with a LiFePO4 charging profile

Fitment and charging

• BCI Group 31 footprint: verify tray dimensions, terminals, wiring and charging-system compatibility before installation
• Allow 15.5 in of length at the handles and 10.5 in of height with terminal bolts when checking compartments and cable clearance
• Confirm battery tray dimensions, cable clearance, terminal compatibility, charger compatibility, fuse sizing, inverter requirements and installation location before use
• Torque the M8 terminals to 8-12 N·m (71-106 in-lb)
• The Bluetooth security PIN is printed on the battery's lid and can be changed in the app (Advanced Settings)

12334A-H Technical Data Sheet
12334A-H User Manual
12334A-H Spec Sheet
Epoch LiFePO4 Safety Data Sheet

Epoch Batteries Limited Warranty

11-Year Limited Warranty: 3 Years Free Replacement

• Years 1–3: free replacement
• Years 4–11: 40% off MSRP on a replacement battery

Epoch Batteries warrants this product to the original end-user purchaser to be free from defects in materials and workmanship under normal use and service for the warranty period above, when it is installed, operated, charged, stored and maintained as its manual describes. The warranty is not transferable and ends if the product is sold or given to someone else.

How the 40% Discount Works
After the free coverage ends and through Year 11, if the battery has a covered defect Epoch offers a new replacement of the same model (or a current Epoch model of equal or greater capacity and function) at 40% off Epoch's MSRP on the date of the offer. The offer covers one replacement per defective battery, bought directly from Epoch, and you pay the discounted price, any tax and shipping.

When Coverage Starts
Coverage starts on the date of your original purchase. To confirm that date, register the product with Epoch within 90 days of purchase or keep your proof of purchase (an invoice or receipt showing the product, purchase date and seller). If you can provide neither, coverage starts on the manufacturing date recorded for the product's serial number. A repaired or replacement product is covered for the rest of the original warranty period.

What Is Not Covered
The warranty covers defects in materials and workmanship only. It does not cover damage or failure caused by installation, wiring or system design that doesn't follow the manual (including undersized or damaged cables, poor crimps, loose or corroded connections and incorrect fusing); reverse polarity, short circuits or faults in the connected electrical system; series or parallel connections beyond the manual's limits, or mixing batteries of different models, capacities, ages or states of charge; a product not secured as the manual requires; charging outside the manual's voltage, current or temperature limits; discharge above the rated current, or engine starting with a battery not listed as a starting or dual-purpose battery; over-discharge, storage fully discharged, or storage for more than 3 months without recharging; accidents, impact, fire, flood, power surges, submersion or exposure beyond the product's IP rating; opening, modification or repair by anyone other than Epoch or an Epoch-authorized provider; removed or altered serial numbers; normal capacity loss and wear consistent with age and use; or cosmetic damage that doesn't affect performance. Using chargers and other equipment from other brands does not affect coverage by itself.

Obtaining Warranty Service
Start a claim through the Epoch Warranty Portal before the warranty period ends, with the model, serial number, proof of purchase or registration, a description of the problem and any photos, videos or app screenshots. If the claim qualifies, Epoch issues an RMA number with packing and shipping instructions; do not ship a product without an RMA. Epoch inspects and tests the product, typically within 3–10 business days after it arrives, and then repairs or replaces it, or makes the discount offer where applicable.

Shipping
You pay to ship the battery to Epoch; Epoch pays to ship an approved warranty repair or free replacement back to you. For discount replacements you pay shipping on the replacement battery. Packaging must follow the RMA instructions (lithium batteries are regulated hazardous materials in transport).

Visit Epoch's Warranty Page to review the complete warranty terms (effective October 17, 2026).

Shipping is typically through freight carriers and the actual shipping time is contingent on your location and the specific warehouse dispatching your order. Please allow for a 1-3 business day processing period before shipment, and an estimated delivery time of up to 7 business days. Your confirmation email will include delivery details and we will send you a tracking number as soon as one is available. If you ordered several separate items, you may receive multiple tracking numbers. Once the item has been shipped, the freight service will contact you to coordinate the date and time of delivery. If you require any special accommodations during delivery please let us know as soon as possible and let the delivery company know when arranging the appointment.

Typically, orders will be dropped off either curbside or outside your front door or garage. It is your responsibility to bring the order inside or to its final destination and to remove any existing items.

Depending on the item, parts may be shipped in multiple boxes, and assembly may be required. When your order is delivered, please check that you have all pieces of the item and that nothing is damaged. If your order is damaged during transit and external damage is visible, note the damage immediately, write it on the delivery documents, take photos and/or videos, and refuse shipment. If there is no visible external damage, accept the package but note “subject to concealed damage” on the delivery documents. Any damage upon delivery needs to be reported within 24 hours of delivery or you may not be eligible for a refund. For additional information on submitting claims, as well as incorrect item exchanges, and replacements, please see our Refund Policy.

For more information about shipping, please visit our complete Shipping Policy.

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