If you have the stand-alone PD9300 converter, as I did on my 370FB, it was necessary to access it from the back side of the breaker panel by taking down the firewall in the storage bay. You will not be able to reach and reprogram the unit by taking out the breaker panel alone. Also, it takes some patience to reprogram the unit. Take the "key", that is taped to the side of the converter, and insert it into the small hole and press firmly. Hold the pin in and observe the color change of the LED through the larger hole. The change in color does not come quickly. When it turns blue, release the pin and that's an indication of a successful reprogram. Also, don't forget to reprogram the Victron MPPT, via the app, to accommodate the LI battery.