Unlike many other industrial and commercial sectors, hotels are unique in that their customers are present 24/7 on the premises. No part of the guest experience may be compromised, leading to heavy diesel consumption for power generation. Diesel engine exhaust fumes are another area of concern; and many guests, particularly for star-rated hotels, are increasingly seeking green hotels. Rooftop solar power presents several advantages to hotels facing the above issues. Several constraints will, however, also need to be considered when introducing solar power into the energy mix of a hotel.