Epoch Batteries 12V 334Ah 4.28kWh Essential Series LiFePO4 Battery – Heated | Bluetooth | Active Balancing |12334A-MC

If your RV, boat, cabin, or off-grid setup is starting to outgrow the usual battery options, the Epoch 12334A-MC brings a lot to the table. You get 334Ah of LiFePO4 capacity, active cell balancing, built-in heating, Victron communication, and Bluetooth monitoring — all packed into a sturdy metal enclosure that feels ready for more than just weekend use.

• 2A Active Cell Balancing – Keeps the internal cells working together instead of letting one lag behind the rest. That means more consistent performance, better usable capacity, and healthier cells over the long run.
• Internal Self-Heating for Sub-Zero Charging – Cold weather doesn’t automatically mean charging has to stop. The built-in heater kicks in when temperatures drop too low, allowing charging in temperatures down to -20°C (-4°F).
• 600A Peak Discharge with 300A Continuous Output – With 300A of continuous discharge and a 600A surge for up to 10 seconds, this battery has plenty of muscle for larger inverters, appliances, and other demanding loads. It can also accept up to 300A of charge current when it’s time to fill the bank back up.
• Victron Communications Compatible – If you’re already running Victron equipment, this battery fits right in. Built-in communication support lets the BMS share data directly with compatible Victron inverter-chargers, solar controllers, and monitoring equipment.
• Scalable Up to 16 Units in Parallel – One battery already gives you 334Ah, but you’re not stuck there. Connect up to 16 units in parallel and the system can grow all the way to 5,344Ah or 68.48kWh of total storage.

The 12334A-MC makes the most sense in systems where a small battery bank simply isn’t going to cut it. Think live-aboard boats, larger RV builds, off-grid cabins, solar storage systems, and other setups where capacity and high-current performance matter every day, not just occasionally. The metal housing also gives it a more substantial feel than the typical plastic battery case, while the IP21 enclosure adds protection against dripping water when properly installed.

Checking on the battery is straightforward too. Built-in Bluetooth lets you view voltage, current, temperature, state of charge, and BMS status from a compatible iOS or Android device. Inside, the 4S1P prismatic LiFePO4 cells, 2A active balancing system, and internal heater all work together to keep performance steady through changing loads, weather, and charging conditions.

It also comes with the certifications you’d expect from a battery built for serious installations, including UL 1642 cell certification, UL 9540A, IEC 62619:2022, CE, and RoHS compliance. For transportation, it meets UN 38.3 Class 9 lithium battery requirements as well.

Technical Specification