Epoch 48V 125Ah Essentials LiFePO4 Battery 48125A-COMM, 6.4kWh, 150A Continuous, Heated, Bluetooth, Victron GX CAN Comms

About the Epoch 48V 125Ah Essentials LiFePO4 Battery

Most 48V systems start with one question: will one battery carry the inverter? This 48V lithium battery covers about 7,680W of DC draw before inverter losses at its 150A continuous rating, and its 300A, 10-second rating takes start-up surges from well pumps, compressors and welders. Epoch's advice is to size the battery by the inverter's DC input current and keep anything longer than 10 seconds at or below 150A.

Epoch plans runtime on about 5,120Wh, 80% of nominal: roughly 5.1 hours at a steady 1,000W, 1.7 hours at 3,000W, or 10.2 hours at 500W. That makes one battery a practical core for an off-grid cabin, a 48V RV or marine house bank, or a golf cart or utility vehicle whose motor controller stays within 150A continuous.

Victron Cerbo GX and Ekrano GX Communication With DVCC

The battery speaks CAN to Victron GX devices, and the cable for that link comes in the box. On a Cerbo GX MK2 or Ekrano GX, connect to VE.Can 2, set the bus to 500 kbit/s, turn on DVCC with shared voltage and temperature sense, and select the CAN-LV battery as the battery monitor. The original Cerbo GX connects through its BMS-Can port instead, with no bus speed to set.

The integrated shunt supplies state of charge to the GX, so the system needs no separate battery monitor. Epoch documents closed-loop communication with Victron GX devices only; any other 48V inverter-charger, solar charge controller or charger runs it open loop when set to Epoch's LiFePO4 values.

Building a 48V Battery Bank: Up to 15 in Parallel

Linking batteries takes standard RJ45 patch cables: RS485-OUT on each battery to RS485-IN on the next, with only the first battery's CAN port going to the GX and caps on unused ports. The batteries choose a primary on their own, so there are no DIP switches or addresses to set. Use identical batteries of the same age and capacity, and fully charge each one on its own before connecting it.

For two batteries, take the positive feed from one and the negative from the other. Three or more call for positive and negative busbars with identical cable lengths and gauges, and our custom battery cable builder makes matched sets from 6 AWG to 4/0 AWG.

Epoch calls for a DC-rated fuse or breaker on each battery's positive lead, as close as practical to the terminal and rated for the 48V system voltage and that battery's current. On the bank's main positive, a Class-T fuse provides the interrupt rating a 48V lithium bank needs.

Not sure how many batteries your inverter and daily loads need? Our team is happy to help with sizing.

Cold-Weather Charging and Where to Install It

When the cells reach 32°F (0°C), the BMS stops charging and sends incoming charger current (at least 0.5A) to internal heating pads, then resumes charging at 41°F (5°C). The heater runs only on charger current, never stored energy, so on a solar-only system it warms the battery while the panels are producing.

Install it upright in a dry, ventilated equipment room or battery enclosure, on a tray, strap, bracket or box rated for 110 lb (50 kg), with the hold-down doing the work instead of the cables. IP54 means dust-protected and splash-resistant, so keep it out of bilges and anywhere standing water collects, and follow the applicable marine electrical standards on a boat.