Essential Series
12V 334Ah MC Essential Series LiFePO4 Battery (4.28kWh)
$1,299
IP21BluetoothHeatedVictron Comms
Capacity: 334Ah
- 11-year warranty
- US-based support
- Available to ship today
Features at a glance
- IP21Weatherproof
Sealed against dust and driving rain.
- 4,500+Cycle life
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.
- 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.
- LiFePO4Thermal stability
Lithium iron phosphate has a far lower thermal-runaway risk than other lithium chemistries. The BMS adds over-temperature and low-temperature charge protection.
- 12V 334Ah Essential Series LiFePO4 (4.28kWh): High-capacity, premium deep-cycle lithium power designed to deliver massive, reliable off-grid energy for RVs, vans, marine setups, and solar systems in a single footprint.
- Plug-and-Play VICTRON COMMS: Seamlessly integrates with Victron ecosystems. Automatically detects the master battery with zero manual configuration required, creating an unlimited, scalable data network for full system visibility.
- High-Output Power Delivery: Engineered to easily run heavy loads (like A/C units and 3000W+ inverters) with a massive 300A max continuous discharge, 600A peak discharge (10s), and rapid 150A continuous charging.
- HEATED for Sub-Zero Charging: Built-in internal heating technology automatically activates in freezing weather, ensuring safe and efficient charging even in extreme winter conditions.
- BLUETOOTH Smart Monitoring: Track real-time battery capacity, voltage, temperature, and overall health directly from your smartphone via the Epoch iOS and Android apps.
- 2A Active Cell Balancing: Advanced internal balancing automatically detects and corrects voltage differences between individual cells to ensure perfectly smooth performance and maximize battery lifespan.
- Advanced Smart BMS Protection: The fully integrated Battery Management System safeguards your massive power bank against over-charging, over-discharging, over-current, short circuits, and extreme temperatures.
- Massive Scalability (Up to 16 in Parallel): Easily expand your off-grid energy storage by safely wiring up to sixteen (16) units in parallel for an immense 68.4kWh power system.
- 4,500+ Cycle Life & 11-Year Warranty: Exceptional maintenance-free durability built to vastly outlast traditional lead-acid batteries, backed by an industry-leading manufacturer warranty for total peace of mind.
Configuration
Cell Configuration: 4S1P
Chemistry: LiFePO4
Current
Ah Capacity: 334Ah
Max Continuous Discharge Amps: 300A
Max Charge Current Amps: 300A
Max Discharge Peak Current Amps: 600A (10 Seconds)
Series | Parallel: 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: 75 (LBS)
Dimensions
Length: 15.35" (inches)
Width: 8.07" (inches)
Height: 11.02" (inches)
To properly charge your Epoch Batteries, you will want to verify that any charging component in your system is capable of being programmed for the following specifications. Charging components can include, but are not limited to converters, inverter chargers, solar charge controllers, DC to DC chargers, etc.
Bulk/Absorption: 14.2V – 14.6V
Absorption Time: Two batteries in parallel connections require 30 minutes 200Ah
Float: 13.4V – 13.8V
Equalization: 14.4V/ Disabled
Temperature Compensation: 0/Disabled
Charge Rate: 50% of the battery or battery bank capacity
Battery Charge Temperature Range: 32°F (0°C) to 131°F (55°C)
Battery Discharge Temperature Range: -4°F (-20°C) to 140°F (60°C)
Cell Charge Temperature: 32°F (0°C) to 131°F (55°C)
Cell Discharge Temperature: -4°F (-20°C) to 140°F (60°C)
NOTE: Not all chargers are capable of multistage charging. If yours is not, you will want to verify it can be programmed for the Bulk/Absorption voltage and have the other items mentioned disabled if applicable. Consult your charger's manual or the manufacturer.
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 (protected installation)
- Yachts and large cruising boats (protected installation)
- 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
- Ham radio and communications backup
- Commercial fleet and specialty power systems
RV · Camper · Van conversion lithium power
Epoch Essentials 12V 334Ah RV Lithium Battery (4.28kWh) | Heated & Bluetooth
A 12V 334Ah LiFePO4 battery designed for high-capacity van, camper, and RV energy systems that need serious output in a compact footprint.
The Epoch Essentials 334Ah battery is a 4.28kWh lithium battery built for RVers, camper van builders, and off-grid users who want more boondocking power without sacrificing living space. With 300A continuous discharge, internal heating, Bluetooth app monitoring, Victron communications, 2A active balancing, and a compact 75 lb footprint, it is a high-capacity deep cycle battery for serious 12V power systems.
334Ah
Capacity
4.28kWh
Stored energy
300A
Continuous output
600A
10 sec peak
75 lbs
Battery weight
IP21
Indoor optimized
Built for high-demand RV power systems
11-year warranty
Manufacturer coverage
Victron communications
Cerbo GX ready
Bluetooth monitoring
Epoch app visibility
Internal heating
Cold-weather charging
2A active balancing
Cell-level stability
300A BMS
Heavy-load output
Power Heavy RV Loads with a 300A Smart BMS
Run a properly designed 3000W+ inverter system from one compact 12V lithium battery.
This 12V 334Ah LiFePO4 battery is built around a robust 300A continuous discharge rating, giving DIY builders enough output for serious inverter-based RV and van power systems. At 12.8V, the battery can support roughly 3,840W of DC output before inverter efficiency losses, making it a strong match for properly designed 3000W and 3500W inverter-class systems.
The 600A peak discharge rating for 10 seconds helps handle short-duration startup loads from appliances such as air conditioners, microwaves, espresso machines, induction cooktops, refrigerators, and pumps. As always, inverter size, wiring, fuse protection, ventilation, and charger compatibility must be designed correctly.
Four-Season Ready & Seamless System Integration
Automatic Internal Heating
Internal heating helps protect the cells during winter camping and cold-weather charging. When charging power is available from solar, shore power, or a DC-to-DC alternator charger, the battery can warm itself before accepting a normal charge in sub-zero conditions down to -4°F / -20°C.
Victron Comms & Bluetooth Monitoring
Built-in Victron communications help compatible systems detect the master battery and pass communication through the bank. Bluetooth app monitoring gives RVers and van builders real-time visibility from a phone, including state of charge, voltage, current, temperature, and battery status.
Compact, Safe, and Built for the Long Haul
Optimized for dry interior RV and van installs, including under-bed and dinette bench power systems.
The 75 lb battery fits into a 15.35 in × 8.07 in × 11.02 in footprint, making it a practical under-bed RV battery upgrade or cabinet-mounted battery bank for camper vans and off-grid RV conversions. Its IP21 rating is optimized for protected indoor use rather than exposed exterior battery trays.
2A active balancing automatically helps detect and correct voltage differences between cells, while the 4,500+ cycle rating and 11-year warranty support long-term confidence for demanding mobile and off-grid electrical systems.
Compatible applications
RV, camper, van conversion, solar, and off-grid 12V power systems.
- ✓ RV, camper, motorhome, travel trailer, and fifth-wheel house-power systems.
- ✓ Camper van and skoolie electrical builds that need high capacity without wasting living space.
- ✓ Under-bed RV battery upgrade projects, dinette bench installs, and interior electrical cabinets.
- ✓ Boondocking power setups for air conditioning, microwaves, induction cooking, coffee makers, and residential refrigerators.
- ✓ Off-grid van conversion and solar battery banks using lithium-compatible charge controllers and inverter chargers.
- ✓ Victron Cerbo GX and compatible Victron-connected systems where communication requirements are met.
- ✓ Marine house-power, backup power, and larger 12V deep-cycle energy-storage systems.
- ✓ Parallel battery banks up to 16 batteries for larger 12V off-grid capacity.
Battery features
High-output LiFePO4 performance with smart monitoring, heating, balancing, and Victron support.
334Ah / 4.28kWh capacity
A high-capacity deep cycle battery that stores serious off-grid energy in one compact 12V package.
300A continuous discharge
Supports demanding 12V loads and properly designed 3000W+ inverter-class systems.
600A peak discharge
Provides short-duration surge capability for up to 10 seconds to help handle appliance startup loads.
Internal heating
Supports cold-weather charging when incoming charge current is available and temperatures are below freezing.
Victron communications
Designed to integrate with compatible Victron systems and pass communication through a battery bank.
Bluetooth app monitoring
View state of charge, voltage, current, temperature, and battery status from compatible iOS and Android devices.
2A active balancing
Automatically helps detect and correct voltage differences between cells for smoother long-term performance.
IP21 indoor use
Optimized for dry, protected RV and van installation spaces such as under beds, benches, or cabinets.
4,500+ cycle life
Long-lasting LiFePO4 performance for repeated deep-cycle use in mobile and off-grid applications.
Parallel expansion
Supports up to 16 batteries in parallel for large 12V battery banks where properly designed.
75 lb weight
High usable capacity without the weight penalty of multiple lead-acid or AGM batteries.
11-year warranty
Premium manufacturer warranty coverage for long-term RV, van, and off-grid investment confidence.
Compatible charging equipment
Use lithium-compatible hardware programmed for Epoch’s charging settings.
✓
Lithium-compatible inverter chargers and converters
✓
Solar charge controllers programmed for LiFePO4 batteries
✓
DC-to-DC alternator chargers for van and RV charging systems
✓
Victron Cerbo GX or compatible Victron monitoring hardware where applicable
Technical Specifications & Dimensions
Full technical details, dimensions, weight, communication features, and charging settings.
| General | |
|---|---|
| Brand | Epoch Batteries |
| Model / SKU | 12334A-MC |
| Series | Essential Series |
| Battery type | Heated Bluetooth deep-cycle LiFePO4 battery |
| Primary use | RV, camper, van, off-grid, solar, and 12V house-power systems |
| Chemistry | LiFePO4 / Lithium iron phosphate |
| Cell configuration | 4S1P |
| Bluetooth | Yes — compatible with Epoch Li-Ion apps for iOS and Android |
| Victron communications | Yes — battery-bank communication support for compatible Victron systems |
| Internal heating | Yes |
| Active balancing | Yes — 2A active balancing |
| Cycle life | 4,500+ cycles |
| Warranty | 11-year manufacturer warranty |
| Voltage and capacity | |
| Nominal voltage | 12.8V |
| Nominal capacity | 334Ah |
| Energy stored | 4.28kWh |
| Operating voltage range | 10.0V – 14.6V |
| Maximum charge voltage | 14.6V |
| Current ratings | |
| Max continuous discharge | 300A |
| Max continuous charge current | 300A per product specification table; product copy also lists 150A max continuous charge |
| Recommended charge rate | 50% of battery or battery-bank capacity |
| Max discharge peak current | 600A @ 10 seconds |
| Configuration | |
| Series connections | Not supported / not listed for this 12V model |
| Parallel connections | Max 16 batteries in parallel |
| System design note | Use matched batteries of the same model, age, capacity, and state of charge |
| Temperature | |
| 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 |
| Recommended storage temperature | 0°C to 35°C / 32°F to 95°F |
| Battery charge temperature range | 0°C to 55°C / 32°F to 131°F once cells are at charging temperature |
| Battery discharge temperature range | -20°C to 60°C / -4°F to 140°F |
| Dimensions and weight | |
| Length | 15.35 in / approx. 38.99 cm |
| Width | 8.07 in / approx. 20.50 cm |
| Height | 11.02 in / approx. 27.99 cm |
| Overall dimensions | 15.35 in L × 8.07 in W × 11.02 in H |
| Weight | 75 lbs / approx. 34.02 kg |
| Mechanical | |
| Case material | Metal |
| Enclosure protection | IP21 — optimized for protected indoor use |
| Terminal type | M10 female |
| Recommended charging settings | |
| Bulk / absorption voltage | 14.2V – 14.6V |
| Absorption time | Follow Epoch guidance for battery-bank size and charger capability |
| Float voltage | 13.4V – 13.8V |
| Equalization | 14.4V / disabled |
| Temperature compensation | 0 / disabled |
| Battery charge temperature range | 0°C to 55°C / 32°F to 131°F |
| BMS high voltage cutoff | 14.6V |
| BMS protection | |
| Overcharge protection | Yes |
| Over-discharge protection | Yes |
| Over-current protection | Yes |
| Short-circuit protection | Yes |
| High and low temperature disconnects | Yes |
Why upgrade to Epoch LiFePO4?
More usable energy. Less weight. Smarter monitoring. Longer service life.
Compared with traditional lead-acid batteries, LiFePO4 technology provides more usable capacity, stable voltage output, fast charging capability, and maintenance-free operation. For RVers and van builders, that means more boondocking runtime, less battery-bank complexity, and far less space lost to multiple heavy lead-acid batteries.
Fitment and installation note
Verify your inverter, charger, wiring, and installation location before use.
Always confirm compartment dimensions, mounting location, cable clearance, terminal compatibility, fuse sizing, charger settings, inverter draw, and ventilation before installation. For large inverter systems, properly sized cables, bus bars, fuses, disconnects, and charge sources are essential. Use matched batteries and balanced wiring for parallel battery banks.
Frequently asked questions
Epoch 12V 334Ah RV Battery FAQs
Common questions about inverter sizing, Victron integration, installation, heating, parallel banks, and RV fitment.
Can I run my RV air conditioner with this single battery?
Yes. The Epoch 12V 334Ah Essential battery uses a heavy-duty 300A continuous BMS. At 12.8V, that is roughly 3,840W of continuous DC output capability before inverter efficiency losses, making it a strong fit for properly designed 3000W+ inverter systems. It also has a 600A peak discharge rating for 10 seconds to help handle appliance startup surges.
Does this battery integrate with my Victron system?
Yes. This model includes built-in Victron communications. In compatible installations, the system can automatically detect the master battery and pass communication through the bank, supporting visibility and control when configured with compatible Victron monitoring equipment such as a Cerbo GX.
Where should I install this battery in my van or camper?
Because this model is IP21 rated, it is best installed in a dry, protected interior location such as under a van bed, inside a dinette bench, in a dedicated electrical cabinet, or in a protected RV battery bay. It should not be installed in exposed exterior locations, wet compartments, or areas where it may be sprayed, submerged, or covered by standing water.
Will the internal heater drain my battery while I am boondocking?
No. The internal heating system is intended to use incoming charge current from solar, shore power, or a DC-to-DC alternator charger. If the battery is below the safe charge temperature, the BMS routes incoming charging energy to the heating system before allowing normal charging. It does not use your stored energy simply to heat itself while sitting off-grid.
Can I wire these batteries in series or parallel?
This 12V 334Ah model is built for 12V systems and parallel expansion. Epoch lists support for up to 16 batteries in parallel for larger 12V banks. Series wiring is not supported or listed for this model, so it should not be used to create a 24V or 48V series bank.
How much space and weight will this save compared to lead-acid batteries?
This battery stores 4.28kWh in a single 15.35 in × 8.07 in × 11.02 in footprint and weighs 75 lbs. To get a similar amount of usable energy from traditional lead-acid or AGM batteries, you would typically need several 100Ah batteries weighing well over 200 lbs combined. This makes the 334Ah Epoch battery a major space and weight saver for vans, campers, and RVs.
What is 2A active balancing?
2A active balancing helps detect and correct voltage differences between cells so the battery can maintain smoother, more consistent performance over time. This is especially useful in large-capacity lithium batteries that see repeated heavy inverter loads and deep-cycle use.
Is this a good battery for a 3000W or 3500W inverter?
Yes, when the inverter system is properly designed. The 300A continuous discharge rating gives the battery enough current capability for many 3000W and 3500W inverter-class systems, but wiring, fusing, inverter surge draw, charger settings, and ventilation should be sized by a qualified installer or experienced builder.
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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.
IP21
Ingress protection
Objects larger than 12.5 mm, such as fingers, and protected against vertically dripping water. Under IEC 60529 the first digit rates solids and the second rates water.
- Finger-safe enclosure
- Drips and condensation
- Indoor installation
IEC 60529, Degrees of protection provided by enclosures
Reviews
Recent reviews
Quality and performance!
Quality construction and great performance. I'll be back for more.
Owner
Bought battery because I have (2) 460 batteries in my RV, great product, has worked perfectly for two years.
Great product
Amazing product at an even better price!!!!!! Works great for our needs and the quality behind the name is unmatched.