Epoch 12V 300Ah (3.84kWh) Essential Series - Bluetooth & Heated LiFePO4 Battery

Name: Epoch 12V 300Ah (3.84kWh) Essential Series - Bluetooth & Heated LiFePO4 Battery
Rating: 5.00 (1 reviews)

BY: Epoch Batteries

SKU: 12300A-H

| Availability: In stock

$1,249.00

Product Highlights

Built for home backup, off-grid power, and RV travel
3,840 Wh capacity for extended backup and off-grid runtime
Self-heating supports charging in cold-weather conditions
Remote monitoring makes power and settings easy to track

Found A Better Price?

Share it with us now and we will beat it. Get the best deal online, guaranteed!

Live Chat With an Expert

Estimated Delivery Between

and .

Order within to get it by the earliest date.

Order within

to get it by the earliest date.

Authorized Epoch Batteries Dealer

Free & Fast Shipping From US Warehouses

Easy 30-Day Returns & Price Beat Guarantee

Lifetime Expert Support

Epoch 12V 300Ah (3.84kWh) Essential Series – Bluetooth & Heated LiFePO4 Battery

The Epoch 12V 300Ah Essential Series LiFePO4 Battery is a high-capacity, smart energy storage solution designed for demanding off-grid, RV, marine, and backup power applications. Featuring built-in Bluetooth monitoring and self-heating technology, this battery ensures reliable performance even in cold environments. With a massive 3.84kWh capacity, long cycle life, and advanced safety protections, it delivers dependable, maintenance-free power for both everyday and critical energy needs.

Epoch 12V 300Ah Essential Series Battery Features

High-Capacity 3.84kWh Storage – Extended runtime. Provides 300Ah capacity for long-lasting energy in off-grid and backup systems.
Built-in Bluetooth Monitoring – Smart control. Allows real-time battery tracking via mobile app for voltage, capacity, and performance.
Self-Heating Technology – Cold weather ready. Ensures safe charging and operation in low-temperature environments.
Advanced LiFePO4 Chemistry – Long lifespan. Offers thousands of cycles with superior safety and stability.
Comprehensive Protection System – Safe operation. Includes overcharge, over-discharge, short-circuit, and temperature protections.

Epoch 12V 300Ah Essential Series Battery Applications

RV & Van Life – High-capacity mobile power
Off-Grid Solar Systems – Reliable energy storage
Marine Applications – Durable and safe battery solution
Home Backup Systems – Emergency power supply
Cabins & Remote Locations – Long-term energy independence

What's Included

Everything you need is included with your product.

1 × Epoch 12V 300Ah LiFePO4 Battery

User Manual

Epoch 12V 300Ah Essential Series Battery Specifications

Electrical Specification

Specification	Details
Nominal Voltage	12.8V
Nominal Capacity	300Ah
Cell Configuration	4S1P
Energy Stored	3.84kWh
Max Charge Voltage	14.6V
Operating Voltage Range	10.0 - 14.6V
Series Connections	Max (4) in Series
Parallel Connections	Max (4) in Parallel, Plug & Play
Low-Temperature Charge Protection	Yes
Bluetooth	Yes
Self-Heating	Yes

Charge specifications

Specification	Details
Max Continuous Charge Current	200A
Bulk/Absorption	14.2V - 14.6V
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	0mV/°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

Discharge specifications

Specification	Details
Max Continuous Discharge	200A
Max Discharge 3 Sec	400A
Discharge Temp Range	-20°C (-4°F) / 60°C (140°F)

Temperature specifications

Specification	Details
Discharge Temperature	-20°C (-4°F) - 60°C (140°F)
Charge Temperature	-20°C (4°F) - 55°C (131°F) (with heating)
Recommended Storage Temperature	0°C (32°F) - 35°C (95°F)

Mechanical specifications

Specifications	Details
Dimensions (L x W x H)	13.75” @Base, 15.5” @ Handles x 7.63” x 10.0”, 10.5” with terminal bolts
Weight	58 lbs
Case Material	ABS & PC blend (UL94-V0 flame rating)
Enclosure Protection	IP54

Compliance specifications

Specifications	Details
Certifications	UL 1642 (Cells) \| UL 9540A (Cells) \| IEC 62619:2022 \| CE, RoHS
Shipping Classification	UN 38.3, CLASS 9

Frequently-Asked Questions

Can this battery handle cold weather?

Yes, the built-in self-heating function allows safe operation and charging in low temperatures.

How do I monitor the battery?

You can connect via Bluetooth and use the app for real-time battery data.

Is this battery safe for indoor use?

Yes, LiFePO4 batteries are safe, stable, and suitable for indoor installations.

Can I expand my system with multiple batteries?

Yes, it supports parallel connections for increased capacity.

Manual

Shipping & Easy Returns

Shipping is free across the Lower 48. No fuel surcharges, no residential fees, and no liftgate charge on freight orders. The price you see is the price you pay. Read our full Shipping Policy here.

Most orders leave the warehouse in 1 to 2 business days and arrive within 3 to 10 business days. We send tracking the moment it ships.

Anything that ships on a pallet goes freight with liftgate and pallet jack included, so the driver gets it off the truck and onto the ground at your address. The carrier will call you directly to schedule a delivery window.

Returns are 30 days from delivery. For freight deliveries, inspect the shipment before you sign for it. If something is damaged in transit, note it on the delivery receipt and we handle the freight claim, not you. Read more about our Returns Policy here.

Why Buy From Us

Buying solar online should not mean guessing your way through the install. Here’s what you get with Off-Grid Source.

We size the system, not just sell it. Call before you order and a sales engineer will check the kit against your actual loads, tell you if you’re buying too much or too little, and list the site-specific parts your install will need.
A+ rated by the Better Business Bureau. Another trust signal that you’re buying from a real company that stands behind the sale.
Free shipping across the Lower 48. No hidden freight charges, residential fees, or liftgate surprises at checkout.
Guaranteed best prices. Find the same product for less elsewhere and we’ll match it.
30-day easy returns. If it is not the right fit, we’ll help you get it sent back.
A real person on the phone. Product questions, sizing, install planning, warranty help: call us at +1 (877) 556-3347.

FAST & FREE SHIPPING

From US-Based Warehouse

30-DAYS EASY RETURNS

Yes, Really.

GUARANTEED BEST PRICES

Find a Better Price? We’ll Match It.

GREAT CUSTOMER SERVICE

Call Us: (+1) 877-556-3347

Our Customers Tell It Better Than We Do

Excellent 4.9/5

Trusted By 10,000+ Customers. See All Reviews.

They Stood By Me

I was a DIY solar power wannabe... that is 'til I connected with Manny... The man's a prince! He not only knows his stuff; he walked me through all things electrical. To make sure I had all I needed... he gave me his cell phone # to text him anytime I got confused... nights and weekends included. The prices were very competitive... definitely go with Manny -- you won't go wrong!

Bruce D.

Awesome Service!

I am always hesitant to buy things at places I have never shopped... I want to give a shout out to Manny who with great patience and knowledge helped me get my orders... I felt valued as a customer and I will definitely be back in the future. I highly recommend them, they make you feel like family.

Jennene A.

Real Person, Honest Service.

I'm about to go off grid. I called Manny, he walked me through everything so I could truly understand what I needed and never tried to upsell me. He was honest and made a customer for life.

Ray B.

Easy Return

I would personally like to thank Manny... I purchased the inverter and decided I needed to return it... Manny was very understanding and went out of his way to help me return the product and not even have to pay for shipping return. He gives this company reputation, honor and quality customer service!

Roger V.

Totally Off Grid.

I have been talking with Manny the owner... He has not only helped me design a system but he's been assisting with the install and components. I am super pleased so far with the assistance.

Jeff S.

Great Product! Fast Shipping

We added 2 more batteries to our current set up. Pleased with the customer service from Off-Grid Source! Will be back!

Jason

Excellent Customer Service

Very fast response times. Very professional. I highly recommend!

Ray W.