Well that makes no sense. The awning lights run off your 12 VDC house buss so as long as the house battery bank is connected to the buss they should work regardless of the status of SP or the generator. All SP and the generator do is supply 120 VAC to the converter to charge the house batteries unless you have disconnected the house batteries. If that is the case the ripple from the converter may not play nice with the LEDS causing the controller to shut them off.
FYI the house batteries should ALWAYS be connected to the DC buss unless storing the RV for more than a few days without SP connected.
Ted & Melinda
2016 ACE 27.1
2016 Chevy Sonic Toad
2020 Chevy Colorado Z71 Trail Runner Alternate Toad