We have been using a Fischer Panda Neo 5000i inverter generator to charge a 600ah lithium battery using a 24/5000/120 Multiplus for two years. (Both the FP and Multi were purchased at same time) All of the sudden two days ago we started getting DC Ripple error (overload + low battery lights) and shutdown. We turned off all AC load and just ran charger but still happened. Then the generator and charger acted as if the current limiter was being dialled down (charge current fluctuated and dropped) until the charger stopped charging alltogether.
All other functions of the Multi work, and the generator works on the AC circuit through the Multi (large AC demand will activate and ramp up the generator) The only thing that does not work is the charger.
???