Epoch Batteries 12V 300Ah Essential Series LiFePO4 Battery
Save 0%
Save %
Original price
$1,249.00
-Original price
$1,249.00
Original price
$1,249.00
$1,249.00-$1,249.00
Current price
$1,249.00
| /
✓ Authorized Epoch Batteries Dealer ✓ Lowest Price Match Guarantee ✓ FAST & FREE Shipping: In Stock Ready To Ship ✓ Questions? Talk to a Epoch Batteries Expert: 1-303-876-7654
Login for Exclusive Member Pricing.
Not a member? Create a Free Account.
Epoch 12V 300Ah Essential Series LiFePO4 Battery (3.84kWh, Group 31)
300Ah in a Group 31 footprint, which is the size most RV and van battery compartments are already built around. 3,840Wh of LiFePO4 with 200A of continuous discharge, internal heating so it charges down to −4°F, and Bluetooth monitoring through the Epoch app.
The Essential Series is Epoch's value line, and the trade against the Pro and Elite ranges is honest: fewer cycles (4,000 rather than 6,000), IP54 rather than IP67, and no CANbus. What you keep is the capacity, the heating, the 11-year warranty and the BMS. For an RV or van house bank that lives in a dry compartment, that's the right set of compromises. Renewable Outdoors is an authorized Epoch dealer — call us at (303) 876-7654 and we'll size the bank with you.
11-Year Warranty
Lowest Price Guarantee
Authorized Epoch Dealer
Free Shipping
0% APR Financing
Expert Support: (303) 876-7654
Why the Essential Series 300Ah
300Ah in a Group 31 Case
3,840Wh in the footprint your compartment was probably designed for — three times a typical Group 31 lead-acid.
Internal Heating
Charges down to −4°F with low-temperature charge protection, which is what makes winter use practical.
4,000+ Cycles
Roughly ten years of daily cycling, behind Epoch's 11-year limited warranty.
200A Continuous Discharge
2,560W at 12.8V, with 400A available for three seconds — enough for a substantial inverter.
Bluetooth Monitoring
State of charge, voltage, current and alarms in the Epoch app on iOS and Android.
4S4P Configurable
Up to four in series for 48V, or four in parallel for 1,200Ah at 12V.
What's Included
What You Get
1 × Epoch 12V 300Ah Essential Series LiFePO4 battery
Documentation and warranty paperwork
Battery cables, fusing, a lithium-profile charger and mounting hardware are separate. We stock Epoch's Essential Series battery tray sized for this model. Terminals are M8 at 8–12 N·m. Call us at (303) 876-7654 and we'll put the parts list together.
Epoch 12V 300Ah Essential Series Specifications
Cell Chemistry
LiFePO4 (lithium iron phosphate)
Cell Configuration
4S1P
Rated Capacity
300Ah — 3,840Wh (3.84kWh)
Nominal Voltage
12.8V
Maximum Charge Voltage
14.6V
Operating Voltage Range
10.0–14.6V
Maximum Continuous Discharge
200A
Maximum Continuous Charge
200A (recommended 50A)
Peak Discharge
400A for 3 seconds
Short Circuit Protection
800A at 500µs
Series Configuration
Up to 4 in series (48V)
Parallel Configuration
Up to 4 in parallel — 1,200Ah; max configuration 4S4P
Cycle Life
4,000+ cycles
Charging Temperature
−4°F to 131°F (−20°C to 55°C) with heating
Discharging Temperature
−4°F to 140°F (−20°C to 60°C)
Storage Temperature
32°F to 95°F (0°C to 35°C)
Internal Heating
Yes, with low-temperature charge protection
Ingress Protection
IP54 — dust-protected, splash-resistant
Communications
Bluetooth with the Epoch Li-Ion app for iOS and Android
BMS Protection
Overcharge, over-discharge, over-current, short circuit, high and low temperature disconnects
Case Material
ABS / PC, UL94-V0
Terminals
M8 bolt, torque 8–12 N·m
Dimensions
13.75" L at base (15.5" at handles) × 7.63" W × 10.0" H (10.5" with terminal bolts) — Group 31
Weight
58 lbs (approx. 26.3 kg)
Certifications
UL1642 and UL9540A cells; IEC 62619:2022; CE; RoHS
Shipping Classification
UN 38.3 Class 9
SKU
12300A-H
Warranty
11-year limited warranty
11-Year Warranty
Every Essential Series 300Ah carries Epoch's 11-year limited manufacturer warranty.
Lowest Price Guarantee
Found it cheaper elsewhere? Call us at (303) 876-7654 before you buy.
Authorized Epoch Dealer
Genuine Epoch hardware with full manufacturer support behind it.
Epoch 12V 300Ah Essential Series LiFePO4 Battery (3.84kWh, Group 31): Frequently Asked Questions
How does the Essential Series differ from Pro and Elite?
Essential is the value line. You get 4,000 cycles rather than 6,000, IP54 sealing rather than IP67, and Bluetooth without CANbus or Victron integration. Capacity, internal heating, the BMS and the 11-year warranty are all still there. For an RV or van house bank in a dry compartment it's the sensible buy; if the battery needs to survive water or talk to a Victron system, step up to Pro or Elite.
What will 300Ah run in an RV?
3,840Wh covers a 12V compressor fridge, LED lighting, water pump, fans, and charging for a day and a half to two days without any input. Add a 2,000W inverter for a coffee maker and a microwave in bursts and you're still comfortable for a day. Call us at (303) 876-7654 with your appliance list and we'll work it through.
Why is the recommended charge current only 50A when it accepts 200A?
200A is what the BMS permits; 50A is what Epoch recommends for longest cell life. Charging gently is easier on any lithium battery. In practice most RV charging sources — solar, a converter, a DC-DC charger from the alternator — deliver well under 50A anyway, so the recommendation rarely constrains anything.
Can I put four in series for a 48V system?
Yes, up to 4S, and up to 4P, so a maximum 4S4P configuration. That said, for a dedicated 48V system a native 48V battery avoids series balancing entirely and is usually the better engineering choice. Happy to compare the two for your build.
What does the IP54 rating mean for where I can install it?
IP54 is dust-protected and splash-resistant — fine for an RV compartment, a garage, a van conversion or a sheltered locker. It is not rated for submersion or for standing water. If the battery will live somewhere that can genuinely get wet, like a boat bilge or an open deck locker, Epoch's Elite and Pro Series batteries are IP67 and that is the specification to buy.
Does it fit a standard Group 31 tray?
The base footprint is Group 31 at 13.75 by 7.63 inches, but note it's 15.5 inches across the handles and 10.5 inches tall with the terminal bolts. Measure your compartment against those larger figures rather than the base ones — that's the dimension that catches people out. We stock Epoch's own tray for this model.
Why lithium iron phosphate rather than lead-acid?
Three reasons that matter in practice. You can use nearly all of the rated capacity rather than half, so a 100Ah LFP battery does the work of a 200Ah lead-acid one. It weighs roughly a third as much for the same usable energy. And it lasts thousands of cycles instead of a few hundred, so cost per cycle is dramatically lower despite the higher purchase price.
Do I need a lithium-specific charger?
Yes. A lead-acid charger's absorption and float voltages are wrong for LFP — it will either leave the battery short of full or hold it at a voltage that shortens its life. Any charger with a LiFePO4 profile works, and we stock Epoch's own matched chargers in 12V, 24V, 36V and 48V.
How long will it really last?
4,000+ cycles to Epoch's rating, and an 11-year limited warranty. For typical RV use — perhaps 60 to 100 cycles a year — the cells will outlast the vehicle. For daily off-grid cycling it's around a decade.
Do you offer financing or price matching?
Yes. We offer 0% APR financing options through Affirm at checkout, and our Lowest Price Guarantee applies — if you find this battery cheaper at another authorized dealer, call us at (303) 876-7654 before you order and we'll take care of it.
