I just Plugged My new 28 RLS In at my house to charge the batteries. Being new to the unit I took a moment to familiarize myself with the location of the water pump hot water heater Exct. I pressed the stereo on button however the unit did not turn on, you can see the time and everything on the display but cannot turn the radio to on to listen to music.....I guess I am wondering does the Radio need to be plugged in to a 30 Amp connection to operate ? surely not right? I am charging the batteries Via just a normal house socket. The stereo worked a week ago when I bought the unit and has just been sitting in my driveway since. and information will be appreciated.