State-owned Energy Efficiency Services Ltd (EESL) will invest Rs 150 crore for upscaling 100 energy efficiency projects in different industrial units of various sectors. “With the aim to augment the use of energy efficiency solutions in the industry sector, Energy Efficiency Services Limited (EESL), a joint venture under the administration of ministry of power, will invest 150 crore for upscaling 100 energy efficiency projects in different industrial units of various sectors, notified under the PAT (Perform Achieve and Trade) scheme of Bureau of Energy Efficiency (BEE),” a statement said.