Epoch Batteries 12V 50Ah Essential Series 1250A-ES | LiFePO4 Battery (0.64kWh) | Bluetooth, IP54, Group 22NF

Specifications

Model / SKU: 1250A-ES

Series: Essential Series

Battery type: Bluetooth deep-cycle LiFePO4 battery

Primary applications: Kayak trolling motors, marine electronics, fish finders, small RV/van systems, portable solar, backup, and 12V auxiliary loads

Chemistry: LiFePO4 / Lithium iron phosphate

Cell configuration: 4S LiFePO4

Bluetooth monitoring: Yes — Epoch Pro app for compatible iOS and Android devices: state of charge, voltage, current, temperature, and BMS status

Bluetooth PIN: If the app asks for one, it is printed on the battery label or in the product documentation

Internal heating: No — this model is not self-heated

Cycle life: 4,000+ cycles

Warranty: 11-year manufacturer warranty; register within 90 days of purchase for full coverage

Nominal voltage: 12.8V

Nominal capacity: 50Ah

Stored energy: 0.64kWh / 640Wh (nominal)

Runtime planning energy: About 512Wh (80% of nominal)

Estimated runtime: About 10.2 h at 50W, 5.1 h at 100W, 4.0 h at 10A (128W), 2.0 h at 250W, 1.0 h at 500W (DC loads at 25°C, new fully charged battery)

Operating voltage range: 10.0V – 14.6V

Maximum charge voltage: 14.6V

Max continuous discharge: 50A

Peak discharge: 170A for up to 3 seconds

Max continuous charge: 50A, all charging sources combined

Recommended charge current: 25A (0.5C, 50% of capacity)

Inverter sizing: Inverter DC input current within 50A (about 640W at 12.8V); usable AC output is lower

Deep-cycle load warning: Do not design continuous loads above the 50A per-battery continuous limit; 170A is a 3-second peak only

Series connections: Max 4 batteries in series (24V, 36V, or 48V system classes)

Parallel connections: Max 4 batteries in parallel

Maximum parallel capacity: Up to 200Ah / 2.56kWh with four matched batteries in parallel

Maximum configuration: 4S4P (16 matched batteries): 51.2V nominal, 200Ah, 10.24kWh

Bank batteries: Matched 1250A-ES batteries of the same age, condition, and state of charge; fully charge each before connecting it into a bank

Length: 9 in (229 mm)

Width: 5⅝ in (143 mm)

Height: 8¼ in (210 mm)

Height with terminal bolts: 8⅝ in (219 mm)

Overall dimensions: 9 in L × 5⅝ in W × 8¼ in H (229 × 143 × 210 mm)

Footprint: BCI Group 22NF

Weight: 14.3 lb / 6.5 kg

Case: Compact Essential case

Enclosure protection: IP54 per IEC 60529

Weather resistance: Dust protected and splash resistant; not waterproof or submersible

Terminal type: Bolt terminals — use the supplied hardware and the torque on the product labeling

Mounting orientation: Upright, unless Epoch documentation for this model allows otherwise

Charge temperature range: 0°C to 55°C / 32°F to 131°F

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

Recommended storage temperature: 0°C to 35°C / 32°F to 95°F, maximum 12 months

Long-term storage: About 50% state of charge or higher, loads disconnected; check and recharge at least every 3 months

Self-heating: No

Low-temperature charge protection: Yes — the BMS blocks charging below 0°C / 32°F

Charger type: 12V LiFePO4-compatible charger, converter, inverter charger, solar controller, or DC-to-DC charger

Compatible charger: Epoch 12V 15A Lithium Battery Charger

Maximum continuous charge: 50A, all charging sources combined

Recommended charge current: 25A for one battery; 50% of bank capacity for multi-battery banks

Bulk / absorption voltage: 14.2V – 14.6V

Absorption time: 30 minutes per 200Ah of bank capacity

Float voltage: 13.4V – 13.8V; float disabled preferred where supported

Re-bulk voltage: 13.2V if programmable

Equalization: Disabled

Temperature compensation: 0mV/°C (disabled)

BMS high-voltage cutoff: 14.6V

SOC recalibration voltage: 14.6V

Alternator charging: DC-to-DC charger programmed for LiFePO4

Battery management: Built-in smart BMS

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

Overcurrent protection: Install a fuse or DC-rated breaker as close as practical to the battery positive terminal

Compliance marks: CE, RoHS

Transport: UN 38.3

In the Box

• 1 x Epoch 12V 50Ah Essential Series LiFePO4 battery (1250A-ES)
• Terminal hardware (the page refers to the supplied hardware)

1250A-ES Spec Sheet
1250A-ES User Manual
1250A-ES Technical Data Sheet
Epoch LiFePO4 Safety Data Sheet

Epoch Batteries Limited Warranty

Warranty Period
11-year manufacturer warranty; register within 90 days of purchase for full coverage

Epoch Batteries-branded products are covered against qualifying defects in materials and workmanship for the applicable warranty period, subject to Epoch's model-specific remedy schedule and the terms of its warranty policy. Epoch-branded chargers carry a 2-year limited warranty and accessories (such as fuel gauges and voltage reducers) a 1-year limited warranty, from the original purchase date.

Registration
Register your battery with Epoch within 90 days of purchase for full warranty coverage. If it is not registered within that time, the warranty period begins from the battery's original manufacturing date. Proof of ownership is required for any claim, and coverage is non-transferable and applies only to the original purchaser.

Remedy
After inspection and testing, Epoch will provide the applicable remedy for a qualifying manufacturing defect: an approved repair, a replacement, or a comparable-product offer according to the model's schedule. Typical repair turnaround is 3–10 business days once the product is received.

Exclusions
Coverage may be denied when a failure is caused by misuse, improper handling, installation or storage, or use outside the product's specifications. Examples include an unsecured battery; loose, corroded or improperly connected terminals; series or parallel connections beyond the manufacturer's recommendations; reverse polarity or short circuits; impact, fire or water submersion; storage above 140°F or below -40°F; prolonged storage fully discharged or batteries left uncharged for more than three months; poor crimps, undersized cables or damaged wiring; opened, modified or tampered products; and use in applications the battery was not designed for, including repeated engine starting on non-cranking models.

Obtaining Warranty Service
Start a claim through the Epoch Batteries Warranty Portal with your model and serial number, proof of purchase, a description of the issue and supporting photos or videos. If approved, Epoch provides an RMA number and packing instructions. Do not ship a product without a valid RMA. The customer arranges and pays for shipment to Epoch, packaged in compliance with lithium battery shipping rules. Epoch Batteries can be reached at 1-888-501-1846 or support@epochbatteries.com.

Visit Epoch's Warranty Page to review the full warranty terms.

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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