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The Epoch 12V 300Ah Essential Series is a Group 31 lithium battery that packs 3.84kWh of stored LiFePO4 energy into a compact, space-saving case. It replaces a bulky lead-acid bank, or three separate 100Ah batteries, with one heated, Bluetooth-monitored deep-cycle power source.
At only 58 lb with a 200A continuous discharge rating, it is built for RV lithium upgrades, space-saving marine house battery systems, van life off-grid banks, solar storage and cold-weather 12V power systems. It is rated for 4,000+ cycles and backed by an 11-year limited manufacturer warranty.
Key Features
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3.84kWh stored energy: Deep-cycle LiFePO4 chemistry packs 300Ah of capacity into a single battery, delivering the heavy, sustained output that RV, marine and off-grid applications demand.
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Heated for cold-weather charging: Built-in automatic internal heating supports cold-weather charging down to -20°C (-4°F): below 0°C (32°F), incoming charge current warms the battery, and charging resumes automatically once it reaches 5°C (41°F).
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Bluetooth monitoring: Monitor real-time state of charge, voltage, current, temperature and battery status from your phone with the free Epoch Li-Ion app for iOS and Android.
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Series and parallel expansion: Connect up to 4 batteries in series (for up to 48V systems) and up to 4 in parallel for a 1,200Ah bank as your energy needs grow.
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Advanced smart BMS: The built-in battery management system guards against overcharge, over-discharge, over-current, short circuits, and extreme high and low temperature conditions.
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Built to go further: A maintenance-free replacement for heavy lead-acid batteries, rated for 4,000+ cycles (over 10 years at one full cycle a day, at the depth of discharge, charge rate and temperature stated on the datasheet, to its end-of-life capacity) and backed by an 11-year limited manufacturer warranty.
Key Benefits
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11-year warranty: Manufacturer coverage
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Internal heating: Cold-weather charging support; warms its cells before charging so it can charge in freezing weather
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Bluetooth monitoring: iOS and Android apps
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Advanced BMS: Built-in safety protection against overcharge, over-discharge, overcurrent and short circuit
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4,000+ cycles: Long-cycle LiFePO4 chemistry
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Group 31 format: Space-saving installation
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IP54: Splash and dust resistant; not waterproof or submersible
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LiFePO4 thermal stability: Far lower thermal-runaway risk than other lithium chemistries; the BMS adds over-temperature and low-temperature charge protection
At a glance
RV, marine, van life, off-grid.
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300Ah: Capacity
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3.84kWh: Stored energy
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58 lb: Battery weight
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200A: Continuous output
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IP54: Weather protection
Maximize your space: the RV and marine upgrade
Replace three 100Ah batteries or a heavy lead-acid bank with one compact 3.84kWh lithium battery.
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300Ah in a Group 31 footprint: 300Ah of lithium capacity in a compact case measuring 13.75 in long at the base, 7.63 in wide and 10.00 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.
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Major weight reduction at only 58 lb: This 58 lb 300Ah battery replaces bulky, heavy lead-acid capacity with a compact lithium design that is easier to lift, position and integrate into weight-sensitive RV, boat and van builds.
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Power heavy appliances with 200A continuous output: The 200A continuous discharge rating and 400A peak for up to 3 seconds support demanding 12V inverter loads when paired with properly sized cabling, fusing and lithium-compatible system equipment. For sustained loads, 150A (0.5C) is the recommended discharge current.
Smart tech built for the elements
Heated 12V lithium performance with Bluetooth visibility and IP54 protection.
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Cold weather ready: internal self-heating: The BMS never starts charging while any battery temperature reading is below 0°C (32°F). Instead, a connected charger supplying at least 0.5A powers internal heating pads, using incoming charge current only and never the battery's stored energy, and charging resumes automatically once the battery reaches 5°C (41°F). The heating system is tested to -20°C (-4°F) and rated for external ambient temperatures down to -40°C (-40°F), making it a strong cold-weather RV battery for shoulder-season camping and marine storage conditions.
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Eliminate guesswork: Bluetooth app monitoring: Use the Epoch Li-Ion app for iOS or Android to view state of charge, voltage, current, temperature and battery status from your phone. A BMS-integrated shunt measures current with 0.2A accuracy on discharge, so no external shunt monitor is needed.
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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 and 11-year reliability
Build the 12V, 24V or 48V power system your application requires.
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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.
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4,000+ cycles and 11-year warranty: LiFePO4 chemistry delivers long service life, stable voltage and maintenance-free operation. This Essential Series model is backed by an 11-year limited manufacturer warranty.
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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.
Compatible chargers and accessories
Recommended add-ons for a complete installation (sold separately).
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Charger: Epoch 12V 15A Lithium Battery Charger.
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Battery tray: Fits the Epoch 12300A-H and 12314-ECO models.
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Installation hardware: Power distribution blocks and properly sized system wiring.
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 security PIN for the Epoch Li-Ion app, which asks for it the first time you connect via Bluetooth. The original PIN is printed on the battery's lid. You can change it in the app under Advanced Settings; the lid sticker still shows the original PIN, so keep a secure record of any new one.
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Security: Prevents unauthorized Bluetooth connections.
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Configuration protection: Protects battery configuration and system parameters.
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Authorized access: Ensures only authorized users can monitor or interact with the battery.
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Record keeping: Photograph the PIN, serial-number and MAC-address stickers on the lid 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, and tighten the M8 terminal bolts to 8-12 N·m. For series or parallel battery banks, use matched batteries of the same model, age, capacity and state of charge.
Expandability
- Up to 4 matched batteries in series (up to 48V)
- Up to 4 in parallel for 1,200Ah at 12V
- Maximum configuration 4S4P
Dimensions and weight
- Length: 13.75 in at base, 15.5 in at handles
- Width: 7.63 in
- Height: 10.00 in, 10.5 in with terminal bolts
- Weight: 58 lb
- BCI Group 31 footprint. Verify tray dimensions, terminals, wiring and charging-system compatibility before installation.
Suitable For:
- RV, camper, travel trailer and motorhome house-power systems
- Travel trailers and fifth wheels, motorhomes and Class A or Class C coaches
- Van life off-grid battery banks and overland auxiliary power systems
- Overlanding and expedition vehicles
- Marine house battery systems for electronics, lighting, pumps and accessories
- Marine electronics and fish finders
- Fishing kayaks and small boats
- Yachts and large cruising boats
- Electric outboards and marine propulsion support
- 12V trolling motor applications where current requirements match
- Solar storage for cabins, trailers, boats, backup systems and off-grid installations
- Solar battery banks and inverter systems
- Home energy storage and backup power
- Camping and emergency power kits
- Ham radio and communications backup
- Commercial fleet and specialty power systems
- 24V, 36V and 48V systems using up to 4 matched batteries in series
Certifications & Standards
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IP54: 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).
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UL 1642: Listed as a cell-level certification on this page (UL 1642; IEC 62619:2022).
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IEC 62619:2022: Listed as a cell-level certification on this page.
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CE, RoHS: Product compliance marks.
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UN 38.3, Class 9: Shipping classification.
Please Note: Deep-cycle battery, not a cranking battery; not for engine starting.
Please Note: Size continuous loads to 200A; 400A applies for up to 3 seconds only; 150A is recommended for sustained loads.
Please Note: The heater runs only from a connected charger supplying at least 0.5A and never uses stored battery energy.
Please Note: IP54 is not submersible.
Please Note: Check handle clearance (15.5 in) and terminal-bolt height (10.5 in); torque M8 terminal bolts to 8-12 N·m.
Please Note: The Bluetooth security PIN is printed on the battery lid; photograph the PIN, serial and MAC labels before installation and keep a secure record of any changed PIN.
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Specifications
General
Brand: Epoch Batteries
Model / SKU: 12300A-H
Series: Essential Series
Battery type: Heated Bluetooth deep-cycle LiFePO4 battery
Battery group size: BCI Group 31
Chemistry: LiFePO4 / Lithium iron phosphate
Cell type: Prismatic LiFePO4
Cell configuration: 4S1P
Bluetooth: Yes — Epoch Li-Ion app (iOS and Android)
Bluetooth security PIN: Printed on the battery's lid; can be changed in the app (Advanced Settings)
Current sensing: BMS-integrated shunt; 0.2A accuracy on discharge
Internal heating: Yes — for cold-weather charging
Cycle life: 4,000+ cycles
Warranty: 11-year limited manufacturer warranty
Voltage and capacity
Nominal voltage: 12.8V
Nominal capacity: 300Ah @ 0.2C
Stored energy (nominal): 3.84kWh (3,840Wh)
Operating voltage range: 10.0V – 14.6V
Maximum charge voltage: 14.6V
Internal resistance: ≤30mΩ
Low-voltage disconnect: 10.0V; reconnect at 12.0V
Inverter / load cutoff: 11.2V
Current ratings
Max continuous discharge: 200A
Recommended discharge current: 150A (0.5C)
Max discharge peak current: 400A for up to 3 seconds
Max continuous charge current: 200A
Recommended charge current: 100A
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 and environment
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: Charging disabled at 0°C / 32°F; resumes automatically at 5°C / 41°F
Heater activation: Charger connected and supplying at least 0.5A; powered by incoming charge current only, never stored battery energy
Heating system: Tested to −20°C / −4°F; rated for external ambient down to −40°C / −40°F
Self-discharge: ≤3% per month
Long-term storage: Charge to about 50% state of charge; check at least every 3 months
Operating altitude: <3,000m / ≈9,840ft
Dimensions and weight
Length: 13.75 in at base / 15.5 in at handles
Width: 7.63 in
Height: 10.00 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 — dust protected, splash resistant; not submersible
Terminal type and torque: M8 bolt / 8–12 N·m (71–106 in-lb)
Recommended charging settings
Maximum continuous charge current: 200A
Recommended charge current: 100A
Bulk / absorption voltage: 14.2V – 14.4V
Absorption end condition: Charge current ≤ C/20 (15A) or 15 minutes, whichever comes first
Float voltage: Disabled (preferred), or 13.3V – 13.6V
Re-bulk voltage: 13.2V
Temperature compensation: 0mV/°C (off)
Equalization: Disabled
Charger temperature limit setting: 0°C to 55°C / 32°F to 131°F, unless the charger has approved cold-charge logic
BMS high voltage cutoff: 14.6V
SoC recalibration voltage: 14.6V
Compliance and listings
Cell-level certifications: UL 1642; IEC 62619:2022
Product: CE; RoHS
Shipping classification: UN 38.3; Class 9
Enclosure: IP54 per IEC 60529
In the Box
- 1 x Epoch 12V 300Ah Essential Series LiFePO4 battery (12300A-H)
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Recommended Charging Settings
Recommended charging settings for the 12300A-H.
- Maximum continuous charge current: 200A
- Recommended charge current: 100A
- Bulk/absorption: 14.2V-14.4V
- Absorption end condition: charge current at or below C/20 (15A) or 15 minutes, whichever comes first
- Float voltage: disabled (preferred) or 13.3V-13.6V
- Re-bulk: 13.2V
- Temperature compensation: 0 mV/°C (off)
- Equalization: disabled
- Charger temperature limit setting: 0°C (32°F) to 55°C (131°F), unless the charger has approved cold-charge logic
- BMS high voltage cutoff: 14.6V
- SoC recalibration: 14.6V
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EPOCH Lithium Upgrade
Epoch 300Ah LiFePO4 - The Best Lithium RV Battery?
You Need Lithium Batteries and They’re Not Hard To Install!
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12300A-H User Manual
12300A-H Technical Data Sheet
12300A-H Spec Sheet
Epoch LiFePO4 Safety Data Sheet
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Can I replace three 100Ah batteries with this single 300Ah battery?
Yes. A single 12V 300Ah Essential Series battery provides 3.84kWh of stored energy, equivalent to three 12V 100Ah lithium batteries. Using one 300Ah battery can save space, reduce 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 in long at the base, 7.63 in wide and 10.00 in high, with 10.5 in of height including terminal bolts and 15.5 in of length at the handles. Always verify tray, hatch, terminal and cable clearance before installation.
What size inverter can a single 12V 300Ah battery run?
This battery has a 200A maximum continuous discharge rating and a 400A peak discharge rating for up to 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. For sustained loads, 150A (0.5C) is the recommended discharge current.
How does the internal heating work for winter RV camping?
Charging lithium cells below freezing can damage them, so the BMS never starts charging while any battery temperature reading is below 0°C (32°F). Instead, a connected charger supplying at least 0.5A powers internal heating pads, using incoming charge current only and never the battery's stored energy. Charging resumes automatically once the battery reaches 5°C (41°F). The heating system is tested to -20°C (-4°F) and rated for external ambient temperatures down to -40°C (-40°F).
Is the battery waterproof?
The 12V 300Ah Essential Series 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 12V 300Ah Essential Series 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 Essential Series supports a maximum configuration of 4 batteries in series and 4 in parallel (4S4P). You can wire two matched batteries in series for a 24V system, four in series for a 48V system, or up to four 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. A BMS-integrated shunt measures current with 0.2A accuracy on discharge, and the built-in Bluetooth module sends state of charge, voltage, current, temperature and battery status to the free Epoch Li-Ion app for iOS and Android. The Bluetooth security PIN is printed on the battery's lid; you can change it in the app under Advanced Settings.
How should I store the battery?
For long-term storage, charge the battery to about 50% state of charge, disconnect loads and chargers, and store it clean and dry at 0°C to 35°C (32°F to 95°F) where practical. Check the state of charge at least every 3 months and recharge as needed.
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Epoch Batteries Limited Warranty
11-Year Limited Warranty: 3 Years Free Replacement
- Years 1–3: free replacement
- Years 4–11: 40% off MSRP on a replacement battery
Epoch Batteries warrants this product to the original end-user purchaser to be free from defects in materials and workmanship under normal use and service for the warranty period above, when it is installed, operated, charged, stored and maintained as its manual describes. The warranty is not transferable and ends if the product is sold or given to someone else.
How the 40% Discount Works
After the free coverage ends and through Year 11, if the battery has a covered defect Epoch offers a new replacement of the same model (or a current Epoch model of equal or greater capacity and function) at 40% off Epoch's MSRP on the date of the offer. The offer covers one replacement per defective battery, bought directly from Epoch, and you pay the discounted price, any tax and shipping.
When Coverage Starts
Coverage starts on the date of your original purchase. To confirm that date, register the product with Epoch within 90 days of purchase or keep your proof of purchase (an invoice or receipt showing the product, purchase date and seller). If you can provide neither, coverage starts on the manufacturing date recorded for the product's serial number. A repaired or replacement product is covered for the rest of the original warranty period.
What Is Not Covered
The warranty covers defects in materials and workmanship only. It does not cover damage or failure caused by installation, wiring or system design that doesn't follow the manual (including undersized or damaged cables, poor crimps, loose or corroded connections and incorrect fusing); reverse polarity, short circuits or faults in the connected electrical system; series or parallel connections beyond the manual's limits, or mixing batteries of different models, capacities, ages or states of charge; a product not secured as the manual requires; charging outside the manual's voltage, current or temperature limits; discharge above the rated current, or engine starting with a battery not listed as a starting or dual-purpose battery; over-discharge, storage fully discharged, or storage for more than 3 months without recharging; accidents, impact, fire, flood, power surges, submersion or exposure beyond the product's IP rating; opening, modification or repair by anyone other than Epoch or an Epoch-authorized provider; removed or altered serial numbers; normal capacity loss and wear consistent with age and use; or cosmetic damage that doesn't affect performance. Using chargers and other equipment from other brands does not affect coverage by itself.
Obtaining Warranty Service
Start a claim through the Epoch Warranty Portal before the warranty period ends, with the model, serial number, proof of purchase or registration, a description of the problem and any photos, videos or app screenshots. If the claim qualifies, Epoch issues an RMA number with packing and shipping instructions; do not ship a product without an RMA. Epoch inspects and tests the product, typically within 3–10 business days after it arrives, and then repairs or replaces it, or makes the discount offer where applicable.
Shipping
You pay to ship the battery to Epoch; Epoch pays to ship an approved warranty repair or free replacement back to you. For discount replacements you pay shipping on the replacement battery. Packaging must follow the RMA instructions (lithium batteries are regulated hazardous materials in transport).
Visit Epoch's Warranty Page to review the complete warranty terms (effective October 17, 2026).
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Shipping is typically through freight carriers and the actual shipping time is contingent on your location and the specific warehouse dispatching your order. Please allow for a 1-3 business day processing period before shipment, and an estimated delivery time of up to 7 business days. Your confirmation email will include delivery details and we will send you a tracking number as soon as one is available. If you ordered several separate items, you may receive multiple tracking numbers. Once the item has been shipped, the freight service will contact you to coordinate the date and time of delivery. If you require any special accommodations during delivery please let us know as soon as possible and let the delivery company know when arranging the appointment.
Typically, orders will be dropped off either curbside or outside your front door or garage. It is your responsibility to bring the order inside or to its final destination and to remove any existing items.
Depending on the item, parts may be shipped in multiple boxes, and assembly may be required. When your order is delivered, please check that you have all pieces of the item and that nothing is damaged. If your order is damaged during transit and external damage is visible, note the damage immediately, write it on the delivery documents, take photos and/or videos, and refuse shipment. If there is no visible external damage, accept the package but note “subject to concealed damage” on the delivery documents. Any damage upon delivery needs to be reported within 24 hours of delivery or you may not be eligible for a refund. For additional information on submitting claims, as well as incorrect item exchanges, and replacements, please see our Refund Policy.
For more information about shipping, please visit our complete Shipping Policy.
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Why Shop With Eco Emperor?
At Eco Emperor, our mission is to empower you to lead a sustainable and fun lifestyle with ease and confidence. Whether you're upgrading your outdoor experience or enhancing your eco-conscious journey, here’s why choosing us is a decision you can feel great about:
Expert and Customized Care
Our knowledgeable and friendly team is here to support you every step of the way. We pride ourselves on providing personalized service and swift responses to ensure a smooth and satisfying experience. Our dedicated team is available via phone, email, and live chat to provide you with prompt and helpful support.
Authorized Retailer of High-Quality, Trusted Products from Leading Brands
We partner with the best brands in the industry to bring you reliable, high-quality products. As authorized retailers, we guarantee authenticity and offer full manufacturer warranties on every item. You can trust that our products are built to last and perform efficiently.
Free & Fast Shipping
We know you’re eager to begin your new products or start your next outdoor adventure. That’s why we prioritize quick, reliable, and free shipping to get your orders to you on time and in perfect condition.
Competitive Pricing
We believe that sustainable living should be accessible to everyone. We offer competitive pricing on all our products, so you can enjoy high-quality eco-friendly solutions and outdoor products without breaking the bank.
Choose Eco Emperor for all your outdoor and eco-friendly product needs, and become part of a movement that’s embracing a more sustainable and adventurous lifestyle.
Thank you for supporting a greener, cleaner future, while enhancing your outdoor experiences and powering your adventures.💚
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