I had an alternator go out on my 7 last weekdend. The first indication was strobe noise in the headset. This I never heard before in 800 hours. Did not register at first what might be wrong. Next morniong tried to start and battery just about dead. It finally started and when I checked battery voltage on RMI monitor, It indicated 11.4 volts....oopsss. Checked field voltage to alternator..11.4 volts. Replacement alternator solved problem. I think a stand alone volt meter or low voltage light is probably more valuable than a ampmeter..IMHO

Apparently the Whelen strobe power supply does weird things at low voltage.
Ed Booth, RV 6,7,10,9A