Epoch Li-ion

I’ve been extremely impressed with the Epoch 460Ah 12V LiFePO4 battery. The capacity, performance, and overall build quality are outstanding. For anyone needing serious off-grid power for an RV, van build, backup system, or mobile work setup, this battery delivers exactly what it promises. The 460Ah capacity provides a massive amount of usable energy, and the LiFePO4 chemistry offers the long cycle life, stable voltage, and safety that lithium batteries are known for. One of the things I noticed immediately is how well the voltage holds under load. Even when running larger loads through an inverter, the battery maintains consistent output without the voltage sag you typically see with lead-acid batteries. Another big advantage is the simplicity of having so much capacity in a single 12V battery. Instead of wiring multiple batteries in parallel, this one unit provides an enormous energy reserve while keeping the system clean and straightforward. One of my favorite features is the Epoch iPhone app. It connects quickly via Bluetooth and gives you detailed real-time information about the battery, including state of charge, voltage, current, temperature, and remaining capacity. The interface is clean, responsive, and easy to understand. Being able to monitor the battery directly from my phone makes managing the system much easier, especially in a mobile setup. Charging performance has also been excellent. The battery accepts charge quickly and efficiently, whether through a DC-DC charger, inverter charger, or generator setup. Overall, the Epoch 460Ah battery is an absolute powerhouse. Between the massive capacity, reliable performance, and the excellent mobile app for monitoring, it’s one of the best lithium battery options available. I would absolutely purchase it again.

The app provides valuable information on the batteries and works well with multiple batteries. However, the battery connection and name is not saved so you have to re-select the batteries every time you close and reopen the app. Furthermore, it is unable to filter out non-epoch devices so all the wireless devices in the area show up in the list making it even more inconvenient to find and select the right devices. This can get very annoying when you want to use the app frequently to check the status of your batteries. This should be a relatively easy programming fix to save the device address so hopefully this will be fixed soon.

Yesterday, the app had the worst Bluetooth connectivity interface in the history of mankind, in that you could never reconnect upon app minimization, the app would show Bluetooth devices having nothing to do with Epoch, including Bluetooth headphones, etc., and it would “favorite” your device, so you’d have to select it every time. But at least once you got connected it would pull all the pertinent data from the battery. Today, it has an all new look to it….and it doesn’t work at all. Battery shows 0%, no voltage, no data whatsoever. So amazingly, despite the Bluetooth interface before, it was actually better than it is now. I emailed customer support with my thoughts on the app a week ago, mostly as a test of their customer service department, and have not heard back. This is not good, and is very telling to me for what I can expect if I ever have a problem with the battery.