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Essential Series
12V 334Ah Essential Series LiFePO4 Battery (4.28kWh)
In Stock
€1,147.95
IP54BluetoothHeated
Capacity: 334Ah
- 11-year warranty
- US-based support
- Available to ship today
Features at a glance
- IP54Weatherproof
Sealed against dust and driving rain.
- 4,000+Cycle life
Over 10 years at one full cycle a day.
- iOS + AndroidBluetooth app
Charge, voltage and temperature on your phone in the Epoch Li-Ion app.
- Advanced BMSProtection
Guards against overcharge, over-discharge, overcurrent and short circuit.
- Self-heatingCold weather
Warms its own cells so it can charge below freezing.
- LiFePO4Safest chemistry
Stable under extreme conditions. 11-year warranty.
- 12V 334Ah LiFePO4 Battery (4.28kWh): Massive deep-cycle energy storage designed to maximize off-grid runtimes for RVs, camper vans, marine house banks, and heavy-duty solar setups.
- High-Output Specifications: Effortlessly power large inverters and heavy appliances with a robust 200A Max Continuous Discharge (400A 3s peak), and recharge incredibly fast with a 200A Max Continuous Charge rate.
- HEATED For Extreme Climates: Built-in internal heating allows for safe, automatic charging even in freezing, sub-zero winter conditions.
- BLUETOOTH App Connectivity: Monitor real-time state of charge, view capacity, and track cycle history directly from your free iOS or Android device.
- Massively Expandable: Easily scale your power system exactly as you need it by safely connecting up to Max (4) in Series (to build 24V, 36V, or 48V systems) and up to Max (16) in Parallel.
- Advanced Smart BMS: Fully integrated Battery Management System automatically protects your investment from over-charging, over-discharging, short circuits, and extreme high/low temperatures.
- Optimized Weights & Dimensions: Pack a staggering 4.28kWh of usable power into a highly portable footprint, saving incredible weight and physical space compared to wiring together multiple heavy lead-acid blocks.
- 4,000+ Cycle Life & Maintenance-Free: Enjoy true drop-in, set-and-forget reliability backed by a solid 11-Year Manufacturer Warranty.
Configuration
Cell Configuration: 4S1P
Chemistry: LiFePO4
Current
Ah Capacity: 334Ah
Max Continuous Discharge Amps: 200A
Max Charge Current Amps: 200A
Max Discharge Peak Current Amps: 400A (3 Seconds)
Series | Parallel: Max (4) in Series, Max (16) in Parallel
Voltage
Voltage: 12.8V
Max Charge Voltage: 14.6V
Operating Voltage Range: 10.0 - 14.6V
Temperature
Charge Temp Range: -20°C (-4°F) / 55°C (131°F) (with heating)
Discharge Temp Range: -20°C (-4°F) / 60°C (140°F)
Storage Temp: 0°C (32°F) / 35°C (95°F)
Weight: 60 (LBS)
Dimensions
Length: 13.75" @ Base, 15.5" @ Handles (inches)
Width: 7.63" (inches)
Height: 10.0", 10.5' with Terminal Bolts (inches)
Maximum Continuous Charge Current: 200A
Bulk/Absorption: 14.2V-14.4V
Absorption End Condition: Stop when charge current ≤ C/20 or 15 min max
Float Voltage: Disabled (preferred) or 13.3V-13.6V
Re-bulk: 13.2V
Temperature Compensation: 0 mV/°C (none)
Equalization: Disabled
Battery Charge Temperature Range: 0°C (32°F) / 55°C (131°F)
BMS High Voltage Cutoff: 14.6V
SoC Recalibration: 14.6V
Epoch Li-Ion App
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Applications & use cases
- 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
- Marine house power
- Trolling motors
- Marine electronics and fish finders
- Yachts and large cruising boats
- Electric outboards and marine propulsion support
- Off-grid solar systems
- Solar battery banks and inverter systems
- Home energy storage and backup power
- Cabins and remote power systems
- Camping and emergency power kits
- Ham radio and communications backup
- Commercial fleet and specialty power systems
RV · Marine · Van conversion · Off-grid storage
Epoch 12V 334Ah RV & Marine Lithium Battery: Massive Off-Grid Power
The Epoch 12V 334Ah lithium battery is a high-capacity RV deep cycle lithium battery and marine LiFePO4 battery built for serious off-grid runtime, delivering 4.28kWh of usable 12V energy in one heated Bluetooth power source.
Designed for RV owners, van lifers, boaters, and solar installers who want to simplify large 12V power banks, this high-capacity 12V lithium battery replaces multiple smaller batteries with one clean drop-in RV replacement. It combines 200A continuous output, internal heating, Bluetooth battery monitor visibility, IP54 protection, and smart BMS protection for dependable house-power storage.
334Ah
Capacity
4.28kWh
Stored energy
200A
Continuous output
60 lb
Battery weight
IP54
Weather protection
Built to go further
6-year warrantyManufacturer coverage
Internal heatingCold-weather charging support
Bluetooth monitoriOS and Android apps
Advanced BMSBuilt-in protection
4,000+ cyclesLong-cycle LiFePO4 chemistry
4S / 16P capableScalable system design
The Ultimate Single-Battery Solution
Replace complex multi-battery banks with one high-capacity 12V lithium battery for RV, marine, and van conversion systems.
Simplify large 12V battery banks
A single Epoch 12V 334Ah battery reduces the need to daisy-chain multiple 100Ah batteries together. Fewer interconnects can mean cleaner installs, fewer resistance points, and more usable space in RV storage bays, van builds, and boat compartments.
4.28kWh off-grid storage
With 334Ah of capacity and 4.28kWh of stored energy, this battery is built for high-capacity 12V lithium storage across RV house power, marine electronics, solar systems, backup loads, and extended off-grid living.
Drop-in RV replacement planning
The large-format case measures 13.75 in long at the base, 7.63 in wide, and 10.0 in high. Allow 15.5 in of length at the handles and 10.5 in of height with terminal bolts when checking compartments and cable clearance.
Power Heavy Loads with Smart Monitoring
Stable LiFePO4 voltage, Bluetooth visibility, and smart BMS protection for mobile off-grid power.
Power high-draw appliances with ease
The 200A continuous discharge rating supports properly designed 12V inverter systems for appliances, tools, galley loads, pumps, electronics, and off-grid equipment. The 400A 3-second peak supports short surge demands within BMS limits.
Smart Bluetooth app monitoring
Use the Epoch Li-Ion app on compatible iOS and Android devices to check state of charge, current, voltage, temperature, and battery status from your smartphone—ideal for RV travel, van life, and marine house-power systems.
Rugged, safe, and maintenance-free
LiFePO4 chemistry is sealed, maintenance-free, and built for deep-cycle power without watering, acid checks, or routine lead-acid service. The advanced BMS helps protect against overcharge, over-discharge, over-current, short circuit, and temperature extremes.
Built for Cold Weather, RV Bays & Marine House Power
Heated 12V lithium battery performance with splash-resistant IP54 protection.
Internal heating for cold-weather charging
Built-in heating helps support safe charging in cold conditions when connected to an approved charging source. The listed charge temperature range is -20°C to 55°C / -4°F to 131°F with heating.
IP54 weather-resistant durability
The IP54 enclosure is dust-protected and splash-resistant for everyday RV, marine, mobile, and outdoor use. It is not designed for submersion or pressure washing.
60-lb high-capacity lithium design
At 60 lb, this high-capacity 12V lithium battery delivers large-bank energy density without the weight, maintenance, and installation complexity associated with traditional lead-acid storage.
Built for RV, Marine, Van Life & Off-Grid Systems
A high-capacity RV deep cycle lithium battery and marine LiFePO4 battery for serious 12V house-power systems.
- ✓RV, camper, travel trailer, and motorhome house-power systems.
- ✓12V lithium battery for van conversion and overland auxiliary power systems.
- ✓Marine LiFePO4 battery banks for electronics, pumps, lighting, navigation, and house loads.
- ✓Solar and off-grid energy storage for cabins, trailers, boats, and backup systems.
- ✓Large 12V inverter systems where load calculations stay within the 200A continuous output limit.
- ✓24V, 36V, and 48V systems using matched batteries in series, up to manufacturer limits.
Scalable 12V, 24V, 36V & 48V Power
Expand with matched batteries for larger RV, marine, solar, and backup energy banks.
Up to 4 in series
Wire matched batteries in series for 24V, 36V, or 48V systems when using compatible full-bank charging equipment and proper system-level protection.
Up to 16 in parallel
Parallel expansion can build extremely large 12V banks. Use matched batteries, equal cable lengths, common busbars, branch fusing, and appropriate disconnects.
4,000+ cycles and 6-year warranty
The LiFePO4 design offers long-cycle, maintenance-free power backed by Epoch’s 6-year manufacturer warranty for this Essential Series model.
Technical Specifications
Key specifications for the Epoch 12V 334Ah Essential Series LiFePO4 Battery.
| 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 |
| Nominal voltage | 12.8V |
| Nominal capacity | 334Ah @ 0.2C |
| Stored energy | 4.28kWh |
| Chemistry | LiFePO4 / Lithium iron phosphate |
| Cell configuration | 4S1P prismatic LiFePO4 |
| Max continuous discharge | 200A |
| Max continuous charge | 200A |
| Peak discharge | 400A for 3 seconds |
| Operating voltage range | 10.0V – 14.6V |
| Max charge voltage | 14.6V |
| Bulk / absorption voltage | 14.2V – 14.4V |
| Float voltage | Disabled preferred, or 13.3V – 13.6V |
| Re-bulk voltage | 13.2V |
| Equalization | Disabled |
| Temperature compensation | 0mV/°C / none |
| Series connection limit | Up to 4 batteries in series |
| Parallel connection limit | Up to 16 batteries in parallel |
| Bluetooth monitoring | Yes — compatible Epoch iOS and Android app monitoring |
| Internal heating | Yes |
| Charge temperature range | -20°C to 55°C / -4°F to 131°F with heating |
| 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 |
| Cycle life | 4,000+ cycles |
| IP rating | IP54 — dust-protected and splash-resistant |
| 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 | Threaded terminal; verify supplied hardware and torque |
| Warranty | 6-year manufacturer warranty |
Fitment and charging note
Verify your system before installation.
Always confirm battery tray dimensions, cable clearance, terminal compatibility, charger compatibility, fuse sizing, inverter requirements, and installation location before use. Use a lithium-compatible charger, inverter charger, solar charge controller, converter, or DC-to-DC charger programmed within Epoch’s recommended LiFePO4 charging settings. Do not use lead-acid equalization modes.
Frequently Asked Questions
Epoch 12V 334Ah Lithium Battery FAQs
Common questions about RV and marine installation, inverter sizing, Bluetooth monitoring, alternator charging, and system expansion.
Is this single 334Ah battery better than wiring three 100Ah batteries together?
Yes. For many RV, marine, and van conversion power banks, a single high-capacity 12V 334Ah lithium battery can be cleaner than wiring three or four smaller batteries together. It reduces parallel cabling, cuts down on connection points, simplifies installation, and keeps the internal cells managed by one advanced BMS. Always verify tray space, cable sizing, fusing, and charger settings before installation.
What size inverter can I run with the 12V 334Ah battery?
This battery has a 200A maximum continuous discharge rating and a 400A peak discharge rating for 3 seconds. At 12.8V nominal, 200A equals about 2,560W of DC output before inverter losses, so a single battery is best matched to 2,000W to 2,400W continuous 12V inverter loads. It can be used with a larger inverter only if the actual continuous draw stays within the battery, wiring, fuse, and inverter limits.
How do I monitor the charge level while traveling?
The battery includes built-in Bluetooth monitoring. By using the compatible Epoch Li-Ion app for iOS or Android, you can view important battery information such as state of charge, voltage, current, temperature, and battery status directly from your smartphone.
Can I charge this battery using my RV's or van's standard alternator?
To safely and efficiently charge this lithium battery from a vehicle alternator, use a properly sized DC-to-DC charger with a LiFePO4 charging profile. A DC-to-DC charger protects the alternator, controls current, and helps ensure the battery receives the correct lithium charging voltage.
Does this battery support cold-weather charging?
Yes. The Epoch 12V 334Ah Essential Series includes internal heating. When connected to an approved LiFePO4 charging source in cold conditions, the battery heating system helps warm the cells before normal charging continues. Epoch lists the charge temperature range as -20°C to 55°C / -4°F to 131°F with heating.
Can I use this battery to start my boat or RV engine?
No. This is a deep-cycle LiFePO4 battery designed for RV house power, marine house banks, van conversion energy storage, solar systems, inverters, lighting, pumps, electronics, and other prolonged 12V loads. For engine starting or cranking applications, use a cranking-rated battery or confirm compatibility directly with Epoch before installation.
Can I connect multiple 12V 334Ah batteries together?
Yes. Epoch lists this model for up to 4 batteries in series and up to 16 batteries in parallel when installed as matched batteries with compatible charging equipment, fusing, disconnects, and system-level protection. Large battery banks should be designed with properly sized cabling, busbars, overcurrent protection, and batteries of the same model, age, capacity, and state of charge.
Is the Epoch 12V 334Ah Essential Series battery waterproof?
This model has an IP54-rated enclosure, meaning it is dust-protected and splash-resistant for everyday RV, marine house-power, mobile, and outdoor use. It should not be submerged, pressure-washed, or installed where standing water can collect around the battery.
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Additional Resources
Safety certifications & listings
Every mark below is a standard this battery has been tested against or a listing it carries. Here is what each one covers, in plain English.
IP54
Ingress protection
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
IEC 60529, Degrees of protection provided by enclosures