Epoch 12V 314Ah Eco Series 12314-ECO | LiFePO4 Battery (4.02kWh) | Group 31

The Epoch 12V 314Ah Eco Series is a value-focused, high-capacity LiFePO4 battery for DIY solar builders, RV converters, off-grid cabin owners and mobile power systems. It stores 4.02kWh (nominal, at 12.8V) in a BCI Group 31 case and weighs 57 lb.

A 250A smart BMS, 750A peak discharge for up to 5 seconds, an IP54 dust- and splash-resistant enclosure and a 4,500+ cycle rating deliver a lot of energy storage in a simple, reliable package. It has no Bluetooth and no internal heating, which keeps the cost down, and it is backed by a 6-year manufacturer warranty when registered within 90 days of purchase.

Key Features

• 12V 314Ah Eco Series LiFePO4 (4.02kWh): A 12.8V nominal, 314Ah deep-cycle battery that stores 4.02kWh (4,019Wh, nominal) in a BCI Group 31 case, for RV solar, off-grid, marine house power and 12V battery banks. 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.
• Size and weight: 13.75 x 7.63 x 10 in (349 x 194 x 254 mm), 15.5 in (394 mm) long at the rope handles and 10.5 in (267 mm) high with terminal bolts; 57 lb (25.85 kg). Epoch makes a matching tray for the 12300A-H, 12334A-H and 12314-ECO.
• 250A smart BMS: 250A maximum continuous discharge for properly designed 3,000W inverter-class systems (inverter DC input within 250A, about 3,200W), and 750A for up to 5 seconds for surge loads such as microwaves, induction cooktops and compressors. Deep-cycle only: not cranking-rated, so not for engine starting.
• Charging: 250A maximum continuous charge current from all sources combined, up to 157A recommended, and 14.2V-14.4V bulk/absorption. Use a 12V LiFePO4 charge profile, such as the Epoch 12V 15A Lithium Battery Charger; a smaller charger simply takes longer.
• Low-temperature charge protection: 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). Charge only between 0°C and 55°C (32°F to 131°F).
• Smart BMS (20+ safety features): Protects against overcharge, over-discharge, over-current, short circuit, and high and low temperature, with a high-temperature reconnect at 50°C (122°F). It does not replace a correctly sized fuse or DC-rated breaker near the positive terminal.
• No Bluetooth: Monitor it with an external shunt-based battery monitor, such as the Victron SmartShunt 500A/50mV; voltage alone is not a precise state-of-charge reading on LiFePO4.
• IP54 rated: Dust-protected and splash-resistant for everyday mobile, RV, 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 12314-ECO batteries in series (24V, 36V or 48V system classes) and up to 16 in parallel (5,024Ah, 64.31kWh at 12V); the largest bank is 4S16P (64 batteries: 51.2V, 5,024Ah, 257.23kWh).
• 4,500+ cycle life and low maintenance: No watering, acid service or routine lead-acid maintenance; routine inspections and terminal checks (8-12 Nm) keep it safe. 4,500+ cycles is over 12 years at one full cycle a day, rated at the depth of discharge, charge rate and temperature stated on the datasheet, to its end-of-life capacity.
• 6-year manufacturer warranty: Register within 90 days of purchase for full warranty coverage.

Key Benefits

• 6-year warranty: Eco Series coverage
• 250A smart BMS: High-current protection
• Group 31 size: High-capacity footprint
• Low-temp protection: Charge cutoff safety
• IP54 enclosure: Dust and splash resistant
• LiFePO4 safety: Stable lithium chemistry; far lower thermal-runaway risk than other lithium chemistries, with BMS over-temperature and low-temperature charge protection
• Advanced BMS: Guards against overcharge, over-discharge, overcurrent and short circuit

At a glance

• 314Ah: Capacity
• 4.02kWh: Stored energy
• 250A: Continuous output
• 750A: Peak discharge
• 57 lb: Battery weight
• IP54: Splash resistant

Power heavy loads with a 250A smart BMS

Built for 3,000W inverter-class systems, RV appliances, solar storage and off-grid power.

This high-capacity 12V deep-cycle battery includes a robust 250A continuous BMS, allowing one battery to support demanding 12V loads when the inverter, cabling, fusing and low-voltage settings are properly sized. At 12.8V x 250A, the battery can supply roughly 3,200W before inverter efficiency losses, making it a strong fit for many 3,000W inverter systems.

The 750A peak discharge rating for 5 seconds helps handle short surge loads from equipment such as microwaves, induction cooktops, compressors and other off-grid appliances. This model is a deep-cycle battery and should not be used for engine starting unless Epoch confirms compatibility.

Massive scalability: series and parallel expansion

Build a 12V off-grid battery bank or scale to 24V, 36V or 48V systems.

The 12V 314Ah Eco Series supports up to four batteries in series for higher-voltage system designs and up to sixteen batteries in parallel for large 12V capacity expansion. A full 16-battery parallel bank provides up to 5,024Ah and 64.31kWh of stored energy; the largest series-parallel bank, 4S16P (64 batteries), is 51.2V, 5,024Ah and 257.23kWh.

For any large off-grid battery bank, use matched batteries of the same model, age, capacity and state of charge. Balanced wiring, proper busbars, fusing, disconnects, inverter settings and LiFePO4-compatible charging equipment are required.

Built to last: 4,500+ cycles and essential safety

Epoch's product page and data sheet list this model at 4,500+ cycles. It is designed for maintenance-free LiFePO4 service with advanced BMS protection, low-temperature charge protection, over-current protection, short-circuit protection, and high/low temperature disconnects.

• Smart low-temperature protection: The Eco Series does not include active internal heating, but it does include a low-temperature charge disconnect. Below 0°C (32°F), the BMS blocks incoming charge current to help prevent permanent lithium cell damage, while still allowing discharge down to -20°C (-4°F). Charge only between 0°C and 55°C (32°F and 131°F).
• IP54 splash-resistant case and 6-year warranty: The IP54 enclosure is dust-protected and splash-resistant (not waterproof or submersible), making it a practical choice for RV compartments, dry boat consoles, battery boxes, vans, cabins and protected off-grid installations. The Eco Series is backed by a 6-year manufacturer warranty; register within 90 days of purchase for full coverage.

Eco Series feature highlights

Capacity, current output, and simple dependable power.

• 314Ah high-capacity storage: Stores 4.02kWh of energy in one practical Group 31 lithium battery.
• 250A continuous discharge: Supports heavy 12V loads, large DC circuits and properly sized inverter systems.
• 750A peak discharge: Delivers short-duration peak current for up to 5 seconds to help handle surge loads.
• 250A max continuous charge: Accepts up to 250A from all charging sources combined (up to 157A recommended) from properly configured lithium-compatible equipment.
• Low-temperature charge disconnect: The BMS blocks charging below 0°C (32°F) to protect the cells; there is no internal heater.
• IP54 splash-resistant case: Dust-protected and splash-resistant for protected RV, marine, mobile and off-grid locations. Not waterproof or submersible.
• 4,500+ cycle life: Epoch's product and data-sheet rating for long-life LiFePO4 service.
• 6-year warranty: Backed by Epoch's 6-year manufacturer warranty for Eco Series batteries.
• No Bluetooth or heater: The simplified Eco Series design prioritizes capacity, current output and value.
• Series and parallel expansion: Supports up to 4 in series and up to 16 in parallel when installed as matched batteries.
• 57 lb weight: A high-capacity lithium battery at a fraction of the weight of many comparable lead-acid banks.
• Maintenance-free LiFePO4: No watering, acid maintenance or routine lead-acid service required.

Compatible chargers and accessories

Recommended add-ons for a complete installation (sold separately).

• Battery tray: Fits the Epoch 12300A-H, 12334A-H and 12314-ECO models.
• Victron SmartShunt 500A/50mV: Bluetooth battery monitor for external app-based monitoring.
• Charger: Epoch 12V 15A Lithium Battery Charger, or a larger LiFePO4-compatible charger programmed to the correct settings (up to 157A recommended, 250A maximum).
• Installation hardware: Power distribution blocks, busbars, fuses, disconnects and properly sized cables.

IP54 splash and dust protection

Dust protected. Splash resistant. Built for protected mobile and off-grid installations.

The IP54 enclosure is suitable for many protected RV, marine, cabin and outdoor equipment locations. It should not be submerged, pressure washed, or installed in an exposed location where standing water can collect around the battery.

Charging and bank design note

Program your equipment for LiFePO4 and protect every string.

Use LiFePO4-compatible chargers, inverter/chargers, DC-to-DC chargers and solar controllers set to 14.2V-14.4V bulk/absorption, with up to 157A recommended and no more than 250A from all sources combined, and charge only between 0°C and 55°C (32°F and 131°F). Disable equalization and temperature compensation, install a DC-rated fuse or circuit breaker as close as practical to the positive terminal, torque the M8 terminals to 8-12 Nm (71-106 in-lb), mount the battery upright unless Epoch documentation allows otherwise, and verify cable ampacity, voltage drop, tray clearance (15.5 in at the handles, 10.5 in with terminal bolts) and environmental limits before final installation. The 12314-ECO is not a drop-in replacement for every lead-acid installation.

Expandability

• Up to 4 matched 12314-ECO batteries in series (24V, 36V or 48V system classes)
• Up to 16 in parallel: 5,024Ah / 64.31kWh at 12V
• Largest bank: 4S16P (64 batteries) at 51.2V, 5,024Ah, 257.23kWh

Dimensions and weight

• Length: 13.75 in at base, 15.5 in at handles
• Width: 7.63 in
• Height: 10.0 in, 10.5 in with terminal bolts
• Weight: 57 lb
• BCI Group 31 footprint. Verify tray dimensions, terminals, wiring and charging-system compatibility before installation.

What Can It Run?

Estimates use about 3,215Wh of runtime planning energy (80% of the 4,019Wh nominal), with DC loads at 25°C and a new, fully charged battery.

Suitable For:

• RV solar battery banks, camper conversions, travel trailers and motorhome house-power systems
• RV house power, camper vans and van life, travel trailers and fifth wheels, motorhomes and Class A or Class C coaches
• Overlanding and expedition vehicles
• Off-grid battery bank builds for cabins, tiny homes, sheds and remote solar systems
• Van, overland and mobile auxiliary power systems requiring high-capacity 12V energy storage
• Marine house battery systems for electronics, lighting, pumps, refrigeration and accessories
• 12V trolling motors up to 250A
• Marine electronics and fish finders
• Solar battery banks and inverter systems
• Backup power systems for communications, lighting, refrigeration and critical 12V loads
• 3,000W inverter-class systems when inverter, cables, fusing and low-voltage settings are sized correctly
• Lead-acid replacement projects where tray fit, terminal clearance, cable size, overcurrent protection and charger profile check out; it is not a drop-in for every installation
• 24V, 36V and 48V battery banks using up to 4 batteries in series
• Large 12V parallel battery banks up to 16 batteries and 64.31kWh total energy

Certifications & Standards

• IP54: Dust-protected and protected against splashing water from any direction; under IEC 60529 the first digit rates solids and the second rates water (protected from dust, splashes and light rain, sheltered outdoor use).
• UL 1642: The UL standard for lithium cells: each cell design is tested for fire and explosion risk under abuse (short-circuit and overcharge, crush, impact and shock, heating and temperature cycling) before it is built into a pack.
• UL 9540A: A UL test method that measures how a cell behaves if it goes into thermal runaway and whether fire can spread to its neighbours, with heat and gas release measured; the data is used to design safer energy storage systems.
• IEC 62619: The international safety standard for rechargeable lithium cells and batteries in industrial use, including stationary energy storage, covering electrical and mechanical abuse, thermal runaway propagation and battery management functional safety.
• CE: The manufacturer's declaration that the product meets the European Union's health, safety and environmental requirements (safety directives, electromagnetic compatibility, environmental requirements), required to sell it in the European Economic Area.
• RoHS: Complies with the EU Restriction of Hazardous Substances directive (2011/65/EU), which limits lead, mercury, cadmium, restricted flame retardants, phthalates and other toxic materials in electronics.
• UN 38.3: The United Nations test series (altitude, thermal, vibration, shock, external short-circuit, impact, overcharge and forced discharge) every lithium battery must pass before it can be shipped by air, sea or road.
• Scope note: UL 1642 and UL 9540A apply to the cells used in this battery, not to the complete battery assembly.

Please Note: Deep-cycle only: not cranking-rated and not for engine starting.

Please Note: No Bluetooth and no internal heating; use an external shunt-based battery monitor for app-based visibility.

Please Note: Keep continuous loads at or below 250A; 750A is a 5-second peak only.

Please Note: IP54 is not waterproof or submersible.

Please Note: Allow 15.5 in at the rope handles and 10.5 in height with terminal bolts; not a drop-in for every lead-acid installation.

Please Note: Torque M8 terminals to 8-12 Nm (71-106 in-lb), mount upright and install a DC-rated fuse or breaker close to the positive terminal.