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Essential Series
12V 300Ah Essential Series LiFePO4 Battery (3.84kWh)
€1,103.95
IP54BluetoothHeated
Capacity: 300Ah
- 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.
- Massive 3.84kWh Stored Energy: Premium deep-cycle LiFePO4 chemistry engineered to pack an incredible 300Ah of capacity into a single battery. It delivers the heavy, sustained output needed to easily power demanding RV, marine, and off-grid applications.
- High-Capacity Heated Lithium Power: Don't let freezing temperatures stop your adventures. Built-in automatic internal heating provides cold-weather charging support, allowing you to safely charge in sub-zero conditions (below 0°C).
- Complete Visibility via Bluetooth: Eliminate the guesswork. Monitor real-time state of charge, cell voltage, and overall battery health right from your smartphone using the compatible Epoch iOS and Android apps.
- Series & Parallel Expansion: Start strong and seamlessly scale up. Safely connect up to 4 batteries in series (for up to 48V systems) and up to 4 in parallel to unlock a massive 1,200Ah power bank as your energy needs grow.
- Advanced Smart BMS Protections: Operate with total peace of mind. The intelligent built-in Battery Management System automatically safeguards your investment against overcharge, over-discharge, over-current, short circuits, and extreme high/low temperature conditions.
- Built to Go Further: Stop replacing heavy lead-acid batteries. Enjoy a completely maintenance-free power solution engineered for an impressive 4,000+ charge cycles, proudly backed by our industry-leading 11-Year Manufacturer Warranty.
Configuration
Cell Configuration: 4S1P
Chemistry: LiFePO4
Current
Ah Capacity: 300Ah
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 (4) in Parallel - 4S4P
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: 58 (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
Bluetooth Security PIN
This battery includes a security PIN for the mobile app when first connecting via Bluetooth. The PIN is located on the top of your battery. This PIN cannot be changed or deleted for the life of the battery, so we recommend taking a photo of the code for future reference.
- •Prevents unauthorized Bluetooth connections
- •Protects battery configuration and system parameters
- •Ensures only authorized users can monitor or interact with the battery
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
- Fishing kayaks and small boats
- 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 life · Off-grid
12V 300Ah Group 31 Lithium Battery | Epoch Essentials
Upgrade your RV, camper van, or boat with the Epoch 12V 300Ah Essentials, a 12V 300Ah Group 31 lithium battery that delivers 3.84kWh of LiFePO4 energy in a compact, space-saving case.
This 12V 300Ah LiFePO4 battery replaces bulky lead-acid banks or three separate 100Ah batteries with one heated Bluetooth deep-cycle power source. At only 58 lbs with a 200A continuous discharge rating, it is built for RV lithium battery upgrades, space-saving marine house battery systems, van life off-grid battery banks, solar storage, and cold-weather 12V power systems.
300Ah
Capacity
3.84kWh
Stored energy
58 lb
Battery weight
200A
Continuous output
IP54
Weather protection
Built to go further
11-year warrantyManufacturer coverage
Internal heatingCold-weather charging support
Bluetooth monitoringiOS and Android apps
Advanced BMSBuilt-in safety protection
4,000+ cyclesLong-cycle LiFePO4 chemistry
Group 31 formatSpace-saving installation
Maximize Your Space: The Ultimate RV & Marine Upgrade
Replace three 100Ah batteries or a heavy lead-acid bank with one compact 3.84kWh lithium battery.
300Ah in a Group 31 footprint
Get 300Ah of lithium capacity in a compact case measuring 13.75 in long at the base, 7.63 in wide, and 10.0 in high. Allow 15.5 in of handle length and 10.5 in of height with terminal bolts when checking RV compartments, marine hatches, and battery trays.
Massive weight reduction at only 58 lbs
This 58-lb 300Ah battery replaces bulky, heavy lead-acid capacity with a compact lithium design that is easier to lift, easier to position, and easier to integrate into weight-sensitive RV, boat, and van builds.
Power heavy appliances with 200A continuous output
The 200A continuous discharge rating and 400A 3-second peak support demanding 12V inverter loads when paired with properly sized cabling, fusing, and lithium-compatible system equipment.
Smart Tech Built for the Elements
Heated 12V lithium battery performance with Bluetooth visibility and IP54 protection.
Cold weather ready: internal self-heating
Built-in heating helps support charging down to -4°F / -20°C when charge current is available. The system helps warm the cells before normal charging, making it a strong cold weather RV battery for shoulder-season camping and marine storage conditions.
Eliminate guesswork: Bluetooth app monitoring
Use the Epoch Li-Ion app for iOS or Android to view important battery information from your phone, including state of charge, voltage, current, temperature, and battery status without installing an external shunt monitor.
IP54 weather and dust protection
The IP54-rated enclosure is dust-protected and splash-resistant for everyday RV battery bays, van compartments, and marine house-power environments. It is not designed for submersion.
Scalability & 11-Year Reliability
Build the 12V, 24V, or 48V power system your application requires.
Expand up to 4S4P
Connect up to 4 matched batteries in series for 48V systems or up to 4 matched batteries in parallel for a 1,200Ah 12V bank. Maximum configuration is 4S4P when installed according to Epoch guidance.
4,000+ cycles and 11-year warranty
LiFePO4 chemistry delivers long service life, stable voltage, and maintenance-free operation. This Epoch Essentials model is backed by an 11-year manufacturer warranty.
Advanced BMS protection
The built-in smart BMS helps protect against overcharge, over-discharge, over-current, short circuit, and high or low temperature conditions for safer deep-cycle power.
Built for RV, Marine, Van Life & Off-Grid Systems
A space-saving marine house battery and RV lithium battery upgrade for high-capacity 12V storage.
- ✓RV, camper, travel trailer, and motorhome house-power systems.
- ✓Van life off-grid battery banks and overland auxiliary power systems.
- ✓Marine house battery systems for electronics, lighting, pumps, and accessories.
- ✓Solar storage for cabins, trailers, boats, backup systems, and off-grid installations.
- ✓12V trolling motor lithium battery applications where current requirements match.
- ✓24V, 36V, and 48V systems using matched batteries in series, up to manufacturer limits.
Compatible chargers and accessories
Recommended add-ons for a complete installation.
✓Epoch 12V 15A battery charger.
✓Battery tray for Epoch 12300A-H and 12314-ECO models.
✓Power distribution blocks and properly sized system wiring.
Technical Specifications
Clean reference specs for the Epoch 12V 300Ah Group 31 lithium battery.
| General | |
|---|---|
| Brand | Epoch Batteries |
| Model / SKU | 12300A-H |
| Series | Essential Series |
| Battery type | Heated Bluetooth deep-cycle LiFePO4 battery |
| Battery group size | Group 31 |
| Chemistry | LiFePO4 / Lithium iron phosphate |
| Cell configuration | 4S1P |
| Bluetooth | Yes — compatible with iOS and Android apps |
| Internal heating | Yes |
| Cycle life | 4,000+ cycles |
| Warranty | 11-year manufacturer warranty |
| Voltage and capacity | |
| Nominal voltage | 12.8V |
| Nominal capacity | 300Ah |
| Energy stored | 3.84kWh |
| Operating voltage range | 10.0V – 14.6V |
| Maximum charge voltage | 14.6V |
| Current ratings | |
| Max continuous discharge | 200A |
| Max continuous charge current | 200A |
| Recommended charge current | 50A |
| Max discharge peak current | 400A @ 3 seconds |
| Short-circuit protection | 800A @ 500µs |
| Series and parallel configuration | |
| Series connections | Max 4 batteries in series, up to 48V systems |
| Parallel connections | Max 4 batteries in parallel, up to 1,200Ah |
| Maximum configuration | 4S4P |
| 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 |
| Low-temperature charge protection | Yes |
| 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 | 58 lbs / approx. 26.3 kg |
| Mechanical | |
| Case material | ABS and PC blend, UL94-V0 flame rating |
| Enclosure protection | IP54 |
| Terminal type and torque | M8 bolt / 8–12 N·m |
| Recommended charging settings | |
| Maximum continuous charge current | 200A |
| Bulk / absorption voltage | 14.2V – 14.4V |
| Absorption end condition | Stop when charge current is ≤ C/20 or 15 minutes max |
| Float voltage | Disabled preferred, or 13.3V – 13.6V |
| Re-bulk voltage | 13.2V |
| Temperature compensation | 0mV/°C / none |
| Equalization | Disabled |
| BMS high voltage cutoff | 14.6V |
| SoC recalibration voltage | 14.6V |
| Compliance and listings | |
| Certifications / compliance | UL 1642 cells, UL 9540A cells, IEC 62619:2022, CE, RoHS |
| Shipping classification | UN 38.3, Class 9 |
IP54 weather-resistant protection
Dust protected. Splash resistant. Built for daily use.
The IP54-rated enclosure helps protect the battery from dust and water splashes, making it suitable for many everyday outdoor, mobile, RV, and marine house-power environments. It is weather-resistant for normal use, but it should not be submerged or installed where standing water can collect around the battery.
Bluetooth security PIN
App access protection for authorized monitoring.
This battery includes a Bluetooth security PIN for first-time mobile app connection. The PIN is located on the top of the battery and cannot be changed or deleted for the life of the battery.
- ✓Helps prevent unauthorized Bluetooth connections.
- ✓Helps protect battery configuration and system parameters.
- ✓Take a photo of the PIN before installation for future reference.
Fitment and charging note
Verify tray dimensions, cable clearance, and charger settings before installation.
Always confirm battery tray dimensions, Group 31 fitment, handle clearance, terminal-bolt height, cable routing, charger compatibility, and system requirements before installation. Use a lithium-compatible charger, inverter charger, converter, solar charge controller, or DC-to-DC charger programmed within Epoch’s recommended charging parameters. For series or parallel battery banks, use matched batteries of the same model, age, capacity, and state of charge.
Frequently Asked Questions
Common questions about replacing three 100Ah batteries, inverter sizing, heating, Bluetooth, and 4S4P expansion.
Can I replace three 100Ah batteries with this single 300Ah battery?
Yes. A single Epoch 12V 300Ah Essentials battery provides 3.84kWh of energy, which is equivalent to three 12V 100Ah lithium batteries. Using one 300Ah battery can save space, reduce overall wiring complexity, simplify battery balancing under one BMS, and eliminate the need to route thick parallel cables between multiple smaller batteries.
How does a 300Ah battery fit into a Group 31 case?
Epoch uses high-density LiFePO4 cell technology and an efficient internal layout to fit 300Ah of capacity into a compact Group 31 footprint. The battery measures 13.75 inches long at the base, 7.63 inches wide, and 10.0 inches high, with 10.5 inches of height including terminal bolts and 15.5 inches of length at the handles. Always verify tray, hatch, terminal, and cable clearance before installation.
What size inverter can a single 12V 300Ah Essentials battery run?
This battery has a 200A maximum continuous discharge rating and a 400A peak discharge rating for 3 seconds. At 12.8V nominal, 200A is about 2,560W of DC output before inverter losses, so a single battery is commonly suited for 12V inverter systems in the 2,000W to 2,400W class when installed with proper cabling, fusing, inverter sizing, and load management.
How does the internal heating work for winter RV camping?
The Epoch 12V 300Ah Essentials battery includes internal heating to support cold-weather charging. When charging current is available in freezing 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.
Is the Epoch Essentials battery waterproof?
The 12V 300Ah Essentials battery has an IP54-rated enclosure. That means it is dust-protected and splash-resistant for everyday RV, marine house-power, and mobile use. It should not be submerged, pressure-washed, or installed where standing water can collect around the battery.
Can I use this battery to start my boat or RV engine?
No. The Epoch 12V 300Ah Essentials is a dedicated deep-cycle LiFePO4 battery designed for house power, inverters, appliances, trolling motors, lighting, pumps, and other prolonged 12V loads. It is not designed to provide the instantaneous cold cranking amps required to start gas or diesel engines. For starting applications, use a cranking-rated or dual-purpose battery that matches your engine manufacturer’s requirements.
Can I wire these 300Ah batteries in series to create a 24V or 48V system?
Yes. The 12V 300Ah Essentials battery supports a maximum configuration of 4 batteries in series and 4 batteries in parallel, or 4S4P. You can wire two matched batteries in series for a 24V system, four matched batteries in series for a 48V system, or up to four matched batteries in parallel for a 1,200Ah 12V bank. Follow Epoch’s installation guidance and use matched batteries of the same model, age, capacity, and state of charge.
Does this battery have Bluetooth monitoring?
Yes. This battery includes Bluetooth monitoring through compatible Epoch iOS and Android apps, allowing users to check state of charge, voltage, current, temperature, and battery status from a mobile device. It also includes a Bluetooth security PIN located on the top of the battery for first-time app connection.
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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