Ujaas Energy Limited formerly M and B Switchgears Limited is engaged in business of manufacturing distribution transformers, power transformers, furnace transformers and special purpose transformers. M and B is engaged in manufacturing transformers up to 25 megavolt ampere capacity at 132 kilovolt class automatic voltage controllers. As of March 2010, it had an installed capacity to manufacture 5109 transformers. It sells its products to state electricity boards, public sector undertakings, private sector companies engaged in electricity generation and distribution and other industrial undertakings engaged in steel, coal and mine infrastructure as well as engineering and automobile sectors. It manufacture transformers for varied applications including power and distribution transformers, rectifier transformers, furnace duty transformers, dry type transformers, fire proof transformers, potential transformers and convertors and special purpose transformers. The company is also in the business segment of manufacturing and selling solar power systems.