Solar power cuts electricity costs for hotels by generating energy on-site. Hotels with large rooftops or nearby land can install solar panels to produce thousands of kilowatt-hours annually. With over 15. . Oberoi Gurgaon eliminated ₹8. 19 lakhs per room yearly for grid power, the 18% who've gone solar are achieving payback in under 3 years and pocketing 25-year. . Avenston designs and builds solar energy solutions for hospitality companies.