The Central Mechanical Engineering Research Institute (CSIR-CMERI) has developed the world's largest solar tree and installed it at CSIR-CMERI Residential Colony in West Bengal's Durgapur. The capacity of the solar tree is above 11.5 kWp and it can generate 12,000-14,000 units of clean power annually. There are 35 solar panels in each tree with a capacity of 330 wp each.