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RV · Marine · Van conversion · Off-grid storage
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.
Replace complex multi-battery banks with one high-capacity 12V lithium battery for RV, marine, and van conversion systems.
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.
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.
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.
Stable LiFePO4 voltage, Bluetooth visibility, and smart BMS protection for mobile off-grid power.
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.
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.
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.
Heated 12V lithium battery performance with splash-resistant IP54 protection.
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.
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.
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.
A high-capacity RV deep cycle lithium battery and marine LiFePO4 battery for serious 12V house-power systems.
Expand with matched batteries for larger RV, marine, solar, and backup energy banks.
Wire matched batteries in series for 24V, 36V, or 48V systems when using compatible full-bank charging equipment and proper system-level protection.
Parallel expansion can build extremely large 12V banks. Use matched batteries, equal cable lengths, common busbars, branch fusing, and appropriate disconnects.
The LiFePO4 design offers long-cycle, maintenance-free power backed by Epoch’s 6-year manufacturer warranty for this Essential Series model.
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 |
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.
Common questions about RV and marine installation, inverter sizing, Bluetooth monitoring, alternator charging, and system expansion.
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.
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.
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.
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.
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.
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.
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.
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.
Experience worry-free adventures with our robust IP54 protection. Your battery is effectively shielded against dust and water splashes, giving you the confidence to use it in light rain or dusty conditions. While not fully waterproof, IP54 provides reliable protection for most everyday outdoor scenarios.