Ditto above.....Test your battery, see if your getting 12.4 volts from it. Have a load test done on the vehicle. Any auto parts store will perform one free of charge. That will make sure you alternator is charging.I can look into testing it, but I would rather not replace it unless totally necessary. Wouldn’t all of this be running more so off the alternator after the car is running?
You mentioned, you have aftermarket LED lighting. Go back to incandescent lighting. LED’s can play Havoc on your electrical system.