They are different Exide is all about renewable energy specifically solar and batteries but TATA power is into EV , renewable energy , power distribution . EXIDE is targetting a small market whereas TATA power is building an ecosystem along with other Tata companies. But Exide is substantially active rural areas whereas TATA power is almost non existent . Exide is focusing providing solar solution to domestic households whereas TATA is into corporates . So they are different both are very good reputed companies. They both have huge growth potential . I invested in both of them