I purchased a 2020 winnebago vita in Jan 2020. It came with two 100 watt flexible solar panels a real noisy 3200 watt onan diesel generator and two lead acid 12v batteries with a wafco 50 amp converter. The first thing I did was have the dealer replace all of the roof vents with maxi fans with weather proof covers. We then replaced the lead acid batteries with three 200 amp 12v life blue lithium batteries. The next thing I did was replce the "winnebago high efficiency a/c" that would use up to 16 amps with one that has a soft start module and uses about 9 amps. I then installed a power factor corrected 3000 watt magnum hybird inverter/charger that can charge the batteries at 125 amps. The 200 watts of flexible solar was removed and replaced with 780 watts of standard solar panels running at 35 to 40 volts controlled by midnite classic 150 controller. I then purchased the quietest inverter generator I know of the honda 3000is. I placed it on a 2" hitch carrier behind the rv. The generator remains at low idle when running the a/c and is really quiet a short distance away. I then added a remote temperature sensor to the a/c so it could be controlled from where ever we are in the rv and the fan turns off with the compressor. We also added a curtain between the cab and coach area. I am also considering the dual alternator package.