12V 314Ah Eco Series LiFePO4 Battery (4.02kWh)
Description
High-capacity Eco Series LiFePO4 power
Epoch 12V 314Ah Eco Series LiFePO4 Battery (4.02kWh)
A value-focused 12V 314Ah lithium battery built for RV solar, off-grid power, and high-capacity 12V deep-cycle battery banks.
The Epoch 12V 314Ah LiFePO4 battery is an Eco Series high-capacity power solution for DIY solar builders, RV converters, off-grid cabin owners, and mobile power systems. With 4.02kWh of stored energy (nominal, at 12.8V), a 250A smart BMS, 750A peak discharge for up to 5 seconds, a BCI Group 31 footprint, an IP54 dust- and splash-resistant enclosure, and a 57 lb weight, this 12V 314Ah lithium battery delivers maximum energy storage per dollar in a simplified, reliable package. It has no Bluetooth or internal heating, which keeps the price down.
Built for high-value power systems
Power Heavy Loads with a 250A Smart BMS
Built for 3000W 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 × 250A, the battery can supply roughly 3,200W before inverter efficiency losses, making it a strong fit for many 3000W 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 Epoch 12V 314Ah Eco Series supports up to four batteries in series for higher-voltage system designs and up to sixteen batteries in parallel for massive 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.
Compatible applications
RV solar battery, off-grid battery bank, van power, backup, and marine house systems.
- ✓ RV solar battery banks, camper conversions, travel trailers, and motorhome house-power systems.
- ✓ 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.
- ✓ Backup power systems for communications, lighting, refrigeration, and critical 12V loads.
- ✓ 3000W 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.
Built to Last: 4,500+ Cycles and Essential Safety
Official Eco Series cycle-life rating, low-temperature protection, and advanced BMS safeguards.
The official Epoch 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.
Compatible chargers and accessories
Recommended add-ons for a complete installation.
Technical Specifications and Dimensions
Complete technical details for RV solar, off-grid, marine house-power, and high-capacity 12V systems.
| General | |
|---|---|
| Brand | Epoch Batteries |
| Model / SKU | 12314-ECO |
| Series | Eco Series |
| Battery type | Deep-cycle LiFePO4 battery |
| Battery group size | BCI Group 31 |
| Chemistry | LiFePO4 / lithium iron phosphate |
| Cell type | Prismatic LiFePO4 |
| Cell configuration | 4S1P |
| Bluetooth | No — use an external battery monitor |
| Self-heating | No |
| Cycle life | 4,500+ cycles |
| Warranty | 6-year manufacturer warranty; register within 90 days of purchase for full coverage |
| Voltage and capacity | |
| Nominal voltage | 12.8V |
| Nominal capacity | 314Ah |
| Stored energy | 4.02kWh / 4,019Wh (nominal) |
| Runtime planning energy | About 3,215Wh (80% of nominal) |
| Estimated runtime | About 32.2 h at 100W, 6.4 h at 500W, 3.2 h at 1,000W, 2.5 h at 100A (1,280W), 1.6 h at 2,000W (DC loads at 25°C, new fully charged battery) |
| Operating voltage range | 10.0V – 14.6V |
| Maximum charge voltage | 14.6V |
| Current ratings | |
| Max continuous discharge | 250A |
| Peak discharge | 750A for up to 5 seconds (surge loads only) |
| Max continuous charge | 250A, all charging sources combined |
| Recommended charge | Up to 157A (0.5C, 50% of capacity) |
| Inverter sizing | Properly designed 3,000W inverter-class systems; inverter DC input current within 250A (about 3,200W at 12.8V) |
| Deep-cycle load warning | Do not design continuous loads above the 250A per-battery continuous limit; 750A is a 5-second peak only |
| Series and parallel | |
| Series connections | Max 4 batteries in series (24V, 36V, or 48V system classes) |
| Parallel connections | Max 16 batteries in parallel |
| Maximum parallel bank | 5,024Ah / 64.31kWh |
| Maximum configuration | 4S16P (64 matched batteries): 51.2V nominal, 5,024Ah, 257.23kWh |
| Bank batteries | Matched 12314-ECO batteries of the same age, condition, and state of charge; fully charge each before connecting it into a bank |
| Temperature | |
| 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 |
| Long-term storage | About 50% state of charge or higher, loads disconnected; check and recharge at least every 3 months |
| Low-temperature charge protection | Yes — charging blocked below 0°C / 32°F |
| High-temperature reconnect | 50°C / 122°F |
| Dimensions and mechanical | |
| Base length | 13.75 in (349 mm) |
| Length at handles | 15.5 in (394 mm) |
| Width | 7.63 in (194 mm) |
| Height | 10 in (254 mm) body / 10.5 in (267 mm) with terminal bolts |
| Footprint | BCI Group 31 |
| Weight | 57 lb / 25.85 kg |
| Terminals | M8 female |
| Terminal torque | 8–12 Nm (71–106 in-lb) |
| Case material | ABS and PC blend, UL94-V0 flame rating |
| IP rating | IP54 per IEC 60529 — dust-protected and splash-resistant; not submersible |
| Mounting orientation | Upright, unless Epoch documentation for this model allows otherwise |
| Recommended charging settings | |
| Charger type | 12V LiFePO4-compatible charger, converter, inverter charger, solar controller, or DC-to-DC charger |
| Compatible charger | Epoch 12V 15A Lithium Battery Charger; a charger below 157A is suitable, it simply takes longer |
| Bulk / absorption voltage | 14.2V – 14.4V |
| Absorption end | When charge current falls to C/20 (about 15.7A) or after 15 minutes, whichever comes first |
| Float | Disabled preferred, or 13.3V – 13.6V |
| Re-bulk | 13.2V |
| Equalization | Disabled |
| Temperature compensation | 0mV/°C (disabled) |
| BMS high-voltage cutoff | 14.6V |
| SoC recalibration | 14.6V |
| Charge temperature | 0°C to 55°C / 32°F to 131°F |
| Alternator charging | DC-to-DC charger programmed for LiFePO4 |
| BMS protection and monitoring | |
| Smart BMS | Built in with 20+ safety features |
| Protection functions | Overcharge, over-discharge, over-current, short circuit, and high / low temperature disconnects |
| Overcurrent protection | Install a DC-rated fuse or circuit breaker as close as practical to the battery positive terminal; the BMS is not a substitute |
| Monitoring | No Bluetooth; use a shunt-based battery monitor, such as the Victron SmartShunt 500A/50mV sold by Epoch |
| Compliance and listings | |
| Cell certification | UL 1642 (cells) |
| Thermal runaway testing | UL 9540A (cells) |
| Battery certification | IEC 62619:2022 |
| Compliance marks | CE, RoHS |
| Transport | UN 38.3, Class 9 |
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.
Epoch 12V 314Ah Eco Series FAQs
Common questions about inverter sizing, Eco Series features, cold-weather protection, waterproofing, and expansion.
What is the difference between the Eco Series and the Epoch Essentials/Pro Series?
The Eco Series is designed to deliver maximum capacity and power at the most competitive price point. It does not include Bluetooth monitoring or internal heating pads, and it uses an IP54 weather-resistant enclosure with a 6-year warranty. Essentials and Pro models add more premium features such as Bluetooth, active heating, higher IP ratings, or longer warranty coverage depending on model. If you want raw, reliable power and massive capacity on a budget, the Eco Series is the value-focused choice.
What size inverter can this 12V 314Ah battery run?
The 250A continuous BMS allows the battery to continuously output roughly 3,200 watts at 12.8V before inverter efficiency losses. That makes it a strong match for many 3000W inverter systems when the cables, fusing, inverter settings, and installation are sized correctly. The 750A rating covers surges of up to 5 seconds only, such as a microwave, induction cooktop, or compressor starting. Size the system by the inverter's DC input current, which must stay within 250A; usable AC output is lower because of conversion losses.
Can I connect these 314Ah batteries in series or parallel?
Yes. The Epoch 12V 314Ah Eco Series supports up to 4 batteries in series for 24V, 36V, or 48V systems, and up to 16 batteries in parallel for expanded 12V capacity; the largest bank is 4S16P (64 batteries: 51.2V, 5,024Ah, 257.23kWh). Use batteries of the same model, age, capacity, and state of charge, fully charge each one before connecting it, and use matched cabling, proper fusing, and charging equipment rated for the full bank voltage.
Does this battery have cold-weather protection?
Yes. The Eco Series does not include active internal heating pads, but it does include low-temperature charge protection. Below 0°C (32°F), the BMS blocks incoming charge current to help protect the LiFePO4 cells, and the battery can still discharge down to -20°C / -4°F. Charge only between 0°C and 55°C (32°F and 131°F): move a cold battery somewhere warmer and let it stabilize before charging, and never bypass the protection.
Is the Eco Series battery waterproof?
The 12V 314Ah Eco Series has an IP54-rated weather-resistant enclosure. It is protected against dust and water splashes from any direction, making it suitable for RV compartments, battery boxes, off-grid cabins, and protected marine spaces. It is not waterproof or submersible: do not submerge or pressure-wash it, or install it where standing water can collect around the battery.
How much does this battery weigh compared to lead-acid?
The Epoch 12V 314Ah battery weighs 57 lb. Comparable lead-acid or AGM banks with similar practical usable energy can weigh far more and take up significantly more space, especially because lead-acid batteries are commonly limited to about 50% usable depth of discharge. The exact weight savings depends on the lead-acid bank being replaced.
Does the 314Ah Eco Series include Bluetooth or internal heating?
No. This Eco Series model is built for simplified, high-capacity value. It does not include Bluetooth monitoring or internal self-heating. Use an external shunt-based battery monitor, such as the Victron SmartShunt 500A/50mV sold by Epoch, if your system needs app-based visibility; voltage alone is not a precise state-of-charge reading on LiFePO4.
What charger settings should I use?
Use a LiFePO4-compatible charger, such as the Epoch 12V 15A Lithium Battery Charger, or a converter, inverter charger, solar charge controller, or DC-to-DC charger programmed for LiFePO4. Recommended settings include 14.2V–14.4V bulk/absorption, ending when the current falls to C/20 (about 15.7A) or after 15 minutes, float disabled preferred or 13.3V–13.6V, 13.2V re-bulk, equalization disabled, and temperature compensation disabled. Charge at up to 157A (recommended) and never more than 250A from all sources combined; a smaller charger is suitable, it simply takes longer.
