Rayat Shikshan Sanstha’s Radhabai Kale Mahila Mahavidyalaya, Ahmednagar Percentage of power requirement by Renewable energy source Building No. No. of solar heater unit Capacity of each solar heater Electric Unit Saved by Solar water heater (5 unit/ 100 lit. of solar heater)* Electric Unit saved per day Electric Unit Saved per year (a) Total electric unit used per year (b) Required unit per year (a + b) Percentage of electricity saved Saved unit × 100 Required unit Hostel 1 03 500 3×5×5 75 27375 14449 41824 65.45 Hostel 2 04 500 4×5×5 100 36500 26217 62717 58.20 Average Percentage 61.83 *https://www.energyforfuture.in/solar-waterheater-save-on-electricity-bills