I have a 100Ah LiFePO4 Smart accu that is 2 years old.
Last trip I noticed something odd. The battery when charging stayed at 13.4 for hours while the multiplus kept drawing 250W.
Because the battery never reached a close-to-full state, the multiplus continued to try to charge. After many hours of listening to fan noise, I decided to unplug.
A week or so later I noticed that the battery was charged again to the expected 14.2V and kept charging to 100% for the rest of the trip.
My camper builder has since checked everything and couldn't find anything wrong with settings or battery health.
Now a few weeks later, I plan go camping again, and notice the same thing. The battery is stuck at 13.4V when charging which is the equivalent to about 58%.
The only logical explanation I can come up with is that some of the cells are occasionally cutting out completely, due to a technical malfunction.
What should I do? Is there a warranty on the battery? Should I get it repaired or checked? I have already discussed the problem with my camper builder but they have never encountered this before.
