At midnight during my first night the hotel's generator came on (due to load shedding), and it was right outside my window. Terrible noise, how does the hotel expect guests to sleep soundly? I asked to be moved to another room which was possible, luckily.
I am surprised that a hotel in this league doesn't have a 'silent' generator, or house it in a sound proof building. Or have a solar system instead which would be environmentally friendly.