Epoch Batteries

Epoch Batteries 12V 300Ah Heated LiFePO4 Deep Cycle Battery

⚡ 3.84 kWh = Three 100Ah|🔥 Self-Heating|📱 Bluetooth + Shunt|🛡️ 11-Year Battery Warranty

Regular price: Price: $1,249.00
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Sale price: Price: $1,249.00
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Manufacturer Warranty

Capacity 12V 300Ah

Product variants

Quantity

🇺🇸Free ShippingContiguous 48 states
🛡️11-Year Battery WarrantyBacked by Epoch
🔥Self-HeatingCharges down to -20°C
📱Bluetooth + Built-In ShuntNo extra monitor needed
⚡3.84 kWhReplaces three 100Ah
📞Real Human SupportSizing & setup questions

Replace three 100Ah batteries with one heated, Bluetooth-connected battery. The Epoch 12V 300Ah Essential Series stores 3.84kWh in a BCI Group 31 footprint, the same energy as three 100Ah batteries under a single BMS. Automatic internal heating lets it charge in winter, and built-in Bluetooth with a shunt shows your exact state of charge on your phone. It's built for RV, van, boat and off-grid solar owners who want a lot of power in a small space.

3.84 kWhStored energy

4,000+Rated cycles

58 lbTotal weight

200AContinuous output

🔧 Will It Fit & Work for You?

A BCI Group 31 footprint with handles. Popular uses include:

RV, fifth wheel & motorhome house power
Camper vans & overlanding
Marine house power & yachts
Trolling motors
Off-grid solar & inverter systems
Home backup & cabins
24V–48V systems (in series)

📏 Quick check before you order:

Your space fits 13.75" L (15.5" with handles) × 7.63" W × 10" H (10.5" with terminal bolts).
Your inverter's DC input stays within 200A continuous (about 2,560W, which commonly suits 2,000–2,400W inverters), with 150A recommended for sustained loads.
Your charger has a LiFePO4 profile and supplies at least 0.5A so the heater can run in the cold.
It's a deep-cycle battery, not for starting engines.
Add a properly sized fuse or breaker near the positive terminal.

Not sure? Tell us what you're powering and we'll help you size it before you buy.

Why It's the One-Battery Upgrade

⚡

Three Batteries in One

3.84kWh, the same energy as three 100Ah batteries, under one BMS. Simpler wiring and no balancing between batteries.

🔥

Winter-Ready Charging

Below freezing, charging current powers internal heaters (never your stored energy). Tested to -20°C and rated for ambient temperatures down to -40°C.

📱

Bluetooth With a Built-In Shunt

The free Epoch Li-Ion app shows state of charge, voltage, current and temperature, with no separate monitor to buy.

🔌

Runs a Real Inverter

200A continuous (about 2,560W) supports common 2,000–2,400W 12V inverters with proper cabling and fusing.

🧠

Smart BMS Protection

Overcharge, over-discharge, over-current, short circuit and temperature protection, with low-voltage disconnect at 10.0V.

🧰

Zero Maintenance

No watering, no acid, no terminal cleaning. Rated for 4,000+ cycles.

📦 What's in the Box

12V 300Ah Heated LiFePO4 Battery (12300A-H)Bluetooth, built-in shunt & internal heater

Sold separately: LiFePO4 charger, Group 31 battery tray, DC-to-DC charger for alternator charging, fuse or DC-rated breaker, power distribution blocks and cables.

Lithium vs. a Lead-Acid Bank

	Epoch 12V 300Ah Heated	Typical Lead-Acid
Batteries for ~3.8 kWh	1	Several
Weight	58 lb	Many times heavier
Usable capacity	Most of the rated 300Ah	About half, to protect battery life
Cold-weather charging	Built-in heater	Slow & inefficient
Phone monitoring	Yes, with built-in shunt	No
Warranty	11-year limited	Usually 1–2 years

🔌 Charging Made Simple

🔋

Recommended: 100A

Charge at 100A for best results (200A max). Settings for other chargers are in the spec table.

🚫

No Lead-Acid Modes

Use a charger with a LiFePO4 profile. Turn off equalization, desulfation and "repair" modes, and set temperature compensation to 0.

🔥

Cold-Weather Charging

Below 0°C (32°F), a charger supplying at least 0.5A powers the heater. Charging resumes automatically at 5°C (41°F).

🚐

Charging From an Alternator?

Epoch recommends a DC-to-DC charger programmed for LiFePO4 between your alternator and the battery.

🛡️ 11-Year Limited Warranty

Years 1–3Free replacement of a defective battery

Years 4–1140% off MSRP on a replacement battery

📋 Full Specifications

Electrical
Chemistry	LiFePO4, prismatic cells
Configuration	4S1P
Nominal Voltage	12.8V
Capacity / Energy	300Ah / 3,840Wh
Operating Voltage	10.0V – 14.6V
Continuous Discharge	200A (150A recommended)
Peak Discharge	400A (up to 3 sec)
Max Charge Current	200A
Recommended Charge Current	100A
Low-Voltage Disconnect	10.0V (reconnects at 12.0V)
Cycle Life	4,000+ cycles
Self-Discharge	≤3% per month
Series / Parallel	Up to 4 in series / up to 4 in parallel (matched batteries)
Physical
BCI Group Size	Group 31 footprint
Dimensions (L × W × H)	13.75" (15.5" with handles) × 7.63" × 10" (10.5" with bolts)
Metric	349 (394) × 194 × 254 (267) mm
Weight	58 lb (about 26.3 kg)
Case	ABS/PC blend, UL94-V0
Ingress Rating	IP54 (dust protected, splash resistant, not submersible)
Terminals	M8 bolt, 8–12 Nm (71–106 in-lb)
Bluetooth	Yes, Epoch Li-Ion app with built-in shunt
Temperature
Charge	-20°C to 55°C (-4°F to 131°F) with internal heating
Discharge	-20°C to 60°C (-4°F to 140°F)
Storage (recommended)	0°C to 35°C (32°F to 95°F)
Internal Heater	Yes, powered by charge current (0.5A minimum)
Charger Settings
Bulk / Absorption	14.2V – 14.4V
Absorption End	C/20 (15A) or 15 minutes
Float	Disabled (preferred) or 13.3V – 13.6V
Re-Bulk	13.2V
Max Charge Voltage	14.6V
Temp Compensation / Equalization	Off / Off
Certifications
Cells	UL 1642, IEC 62619:2022
Product	CE, RoHS
Transport	UN 38.3
Ordering
SKU	12300A-H

📄 Manuals & Downloads

📋Quick Spec SheetKey specs on one pagePDF ↗ 📊Technical Data SheetFull electrical, charging & BMS detailsPDF ↗ 📘User & Installation ManualWiring, charger setup, storage & carePDF ↗ ⚠️Safety Data Sheet (SDS)LiFePO4 handling, storage & transportPDF ↗ 🛡️Register Your WarrantyRegister with Epoch within 90 days of purchaseEPOCH ↗ 📜Full Warranty Terms11-year limited warranty detailsEPOCH ↗

📱 Get the free Epoch Li-Ion app: App Store · Google Play

❓ Common Questions

Can this replace three 100Ah batteries?

Yes. It stores the same 3.84kWh under one BMS, which simplifies wiring and balancing.

How does 300Ah fit in a Group 31 size?

High-density LiFePO4 cells. It measures 13.75" × 7.63" × 10" at the base. Check tray, hatch and terminal clearance before installing.

What size inverter can it run?

200A at 12.8V is about 2,560W before inverter losses, which commonly suits 2,000–2,400W 12V inverters with proper cabling and fusing. 150A is recommended for sustained loads.

How does the heater work for winter camping?

Charging is blocked below 0°C (32°F). A charger supplying at least 0.5A powers the heaters with incoming charge current only, and charging resumes at 5°C (41°F).

Does it have Bluetooth?

Yes. Built-in Bluetooth and a shunt send state of charge, voltage, current and temperature to the free Epoch Li-Ion app.

Can I wire them for 24V or 48V?

Yes. Up to 4 in series and 4 in parallel, using matched batteries.

Is it waterproof?

No. It's IP54: dust protected and splash resistant. Don't submerge or pressure-wash it.

Can it start my engine?

No. It's a deep-cycle battery. Use a cranking or dual-purpose battery for starting.

Questions About Your Setup? Ask Us First.

Tell us about your RV, boat or solar setup and we'll help you size the battery, inverter and charger.

📞 Call 833-664-7433 📧 Email Us

🔋

LiFePO4 Chemistry

Lithium iron phosphate cells, one of the most stable lithium chemistries available

🧠

Built-In Smart BMS

Guards against overcharge, over-discharge, over-current, short circuit & temperature extremes

🧰

Zero Maintenance

No watering, no acid, no terminal cleaning

🛡️

Backed by Epoch

Manufacturer warranty, plus real help from our team at 833-664-7433

Shipping cost	Free standard and freight shipping on eligible orders. No shipping or handling fees at checkout.
Where we ship	48 contiguous U.S. states, to a physical street address
Where we don't ship	Alaska, Hawaii, U.S. territories, international addresses, PO Boxes, APO/FPO/DPO military addresses
Order cutoff	4:00 PM Eastern, Monday–Friday. Later orders start processing the next business day.
Parcel delivery	About 3–7 business days total
Freight delivery	About 5–18 business days total (large batteries, kits and palletized items)
Pre-orders	Ship on the timeline shown on the product page
Tracking	Emailed when your order ships. Allow 24–48 hours for updates.
Damage or missing package	Damage: tell us within 48 hours of delivery. Missing "delivered" package: tell us within 7 days.

	Parcel (UPS, FedEx, USPS)	Freight (truck, usually on a pallet)
Handling time	1–2 business days	2–3 business days
Transit time	2–5 business days	3–15 business days
Total estimate	3–7 business days	About 5–18 business days
Delivery	Left at your door per carrier practice	Carrier may call to schedule a delivery appointment

Return window	30 days from delivery to request a return RUiXU products: 10 days from delivery
Item condition	Unused, uninstalled, complete, in the original packaging
Change-of-mind restocking fee	Up to 20% of the item price
Damaged, defective or wrong item sent	No restocking fee. We pay return shipping.
Return shipping (change of mind)	Paid by the customer
Refund method	Original payment method
Refund timing	Processed within 7 days of receiving your return. Your bank usually posts it within 5–10 business days.
Exchanges	Damaged or defective items only
Not returnable	Installed or used batteries, special-order items, opened media and mapping cards

Epoch Batteries 12V 300Ah Heated LiFePO4 Deep Cycle Battery

Epoch Batteries 12V 300Ah Heated LiFePO4 Deep Cycle Battery

🔧 Will It Fit & Work for You?