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Epoch 12V 334Ah Marine Lithium Battery – Essential Series Heated & Bluetooth LiFePO4 Deep Cycle
Epoch 12V 334Ah (4.28kWh) heated LiFePO4 deep-cycle battery with Bluetooth, 200A BMS, IP54 case, BCI Group 31 size, 4,000+ cycles and 11-year warranty.
Reference: 12334A-H
In Stock: 8
$1,299.00
Available for local pickup at our Miami or Fort Lauderdale location
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The Epoch 12V 334Ah Essential Series LiFePO4 Battery packs 4.28kWh of deep-cycle energy into a single BCI Group 31 case weighing just 60 lb. It is built for boat house banks, trolling motors, marine electronics, RVs and solar systems where one battery can replace two or three smaller lead-acid or 100Ah lithium batteries.
A 200A continuous BMS (400A peak for 3 seconds) handles large inverters and high-draw loads, while built-in heating allows safe charging in freezing weather. The Epoch Li-Ion app (iOS & Android) shows state of charge, voltage, current and temperature over Bluetooth, with the shunt already integrated into the BMS.
Technical Specifications
| Nominal voltage | 12.8V |
| Capacity | 334Ah |
| Stored energy | 4.28kWh |
| Chemistry | LiFePO4 |
| Max continuous discharge | 200A |
| Peak discharge | 400A (3 s) |
| Max continuous charge | 200A |
| Recommended charge current | 167A (0.5C) |
| Bulk / absorption voltage | 14.2V – 14.4V |
| Series / parallel | Up to 4S / 16P |
| Internal heating | Yes – charging down to -4°F (-20°C) |
| Bluetooth monitoring | Yes – Epoch Li-Ion app |
| Enclosure rating | IP54 |
| Group size | BCI Group 31 |
| Terminals | M8 threaded |
| Dimensions (L × W × H) | 13.75 × 7.63 × 10.0 in |
| Weight | 60 lb (27.2 kg) |
| Cycle life | 4,000+ cycles |
| Warranty | 11-year limited |
Installation & Charging
Use a lithium (LiFePO4) compatible charger, inverter/charger, solar controller or DC-DC charger programmed to Epoch's recommended settings, and do not use lead-acid equalization modes. Always confirm compartment dimensions, cable and fuse sizing and charging-system compatibility before installation.
Warranty & Support
Backed by Epoch Batteries' manufacturer warranty and US-based technical support. Epoch is a veteran-owned company; batteries are designed and engineered in the USA.