After installing the isolatef Orion 30/30 in my Van it worked properly for 2 weeks. Suddenly charging stopped due to low input voltage. In the app the inputvoltage seems ‘stocked’ at 12,3 volt. When i measure the input (at the Orion) after starting the engine it’s about 13,7 volt. I reinstalled the fabricsettings, checked the wiring and the fuse near the battery. What can be the ‘problem’?