Epoch 300ah V2 LifePO4 Battery – Did it survive the cold

by | Mar 9, 2024

Epoch 300ah V2 LifePO4 Battery – Did it survive the cold?

We reviewed the Epoch 300ah V2 LifePO4 Battery back in November 2023. Since that time, it has been our primary 12V battery source and it performed well over several weeks of travel in December into January. During the November evaluation, I shared that we would not be traveling for most of the colder months and I planned to leave both the solar charger and 75 amp converter/charger connected to maintain the battery. Epoch stated the 300ah V2 battery had low temperature disconnect and it was heated for temperatures below 32 degrees. Without these features, any charging that may have occurred during temperatures below 32F would have damaged, or worse, destroyed the battery. For a number of weeks in January and early February, we experienced extended periods with temperatures in the teens and 20s. Now as we prepare for our 2024 travel season, it was time to see of the Epoch 300ah V2 LifePO4 Battery survived the cold.

Multi-day Epoch RV Battery 12V 300Ah Testing

Over two days, we put the Epoch 300ah V2 LifePO4 Battery to the test in our Montana 5th wheel continuously powering a large GE residential refrigerator, lights, TV, and slides, and we also put a large load on the inverter making toast and coffee.

Throughout the evaluation period, we used the iOS Epoch LI-Ion Bluetooth app for iPhones and our Victron Smart Shunt to monitor the performance of the battery. As a check and balance between both monitoring platforms, we found the reporting to be within a percentage point of remaining capacity and available voltage.

Epoch 300ah V2 LifePO4 Battery Cold Test Results

With the battery at full charge, we started testing the Epoch 300ah V2 LifePO4 Battery. During both days of use, we had misty rain and they sky was heavily overcast. I disconnected the 5th wheel from the 50A pedestal, and left the solar charger connected. On day 1 we had no input and day 2 we had about 2 to 3 hours where the solar charger provided less than 50 watts. After 30 hours of testing, we had 40 percent left in the battery.

With the battery experiencing heavily load conditions and the continuous power demand from all the appliances, lights, and the residential refrigerator, we can share with confidence, the battery low temperature and heater features worked as designed during those cold winter weeks.

With the battery’s heavy duty construction, metal case, low temperature disconnect, internal heating, 11 year warranty, and much more, this is a perfect solution for our 12V power needs.

See our video below for the highlights from the two days of testing and the real time battery performance.

Out thanks to Epoch for supplying iLoveRVlife with the Epoch 300ah V2 LifePO4 Battery for our testing. We have provided helpful links below if you’re interested in learning more about the Epoch LifePO4 product line.

Epoch RV Battery 12V 300Ah Specifications

  • LiFePO4 Chemistry – Deep Cycle Battery
  • Epoch RV Battery 12V 300Ah HEATED – Internal heating allows for charging in sub-zero conditions

  • BLUETOOTH – iOS and Android Apps
  • Built-in Smart Battery Management System (BMS)
  • Over charge and over discharge protection
  • Over current and short circuit protection
  • High & low temperature disconnects
  • Max (4) in Series up to 48V @ 300Ah
  • Max (4) in Parallel up to 12V @ 1,200Ah
  • 4,000+ Cycle life & Maintenance-free
  • UL1973, UL1642, IEC 62133, UN38.3
  • 11 Year Manufacturer Warranty
  • Weight: 72 (LBS)
  • Dimensions: 8.1 x 11.1 x 15.4 (inches)
  • Ah Capacity: 300Ah
  • Max Continuous Discharge Amps: 300A
  • Max Charge Current Amps: 300A
  • Max Discharge Peak Current Amps: 900A (3 Seconds)
  • Max (4) in Series, Max (4) in Parallel – 4S4P


  • Voltage: 12.8V
  • Max Charge Voltage: 14.6V
  • Operating Voltage Range: 10.0 – 14.6V
Epoch 300ah v2 lifepo4 battery
Helpful Links:
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