We have the Champion 3100 electric start and we are very pleased with it. It has an RV plug, keeps the batteries charged, starts when we push the button, and will run the air cond if we need it to.
In economy mode it is very quiet and to me sounds no louder than a Honda/Yamaha. With economy mode off, the noise level increases but I haven't heard a similar Honda/Yamaha running at full power to compare.
Sherm & Terry w/rescue Eydie (min Schnauzer) & Charley (std Poodle)
2015 Jay Flight 27RLS (Nights Camped: 102 '15, 90 '16, 80 '17, 161 '18)
2006 Ford F350 6.0 PSD, 4WD, CC, LB, SRW, Camper pkg, Equal-i-zer, GY Endurance (E)