Waaree Energies will invest nearly Rs 3,500 crore in electrolyser, lithium ion battery, and inverter business.The company plans to set up a 3.5 GWh lithium ion advanced chemistry storage cell manufacturing plant with an investment of Rs 650 crore.They will also establish a 300 megawatt electrolyser manufacturing plant with an investment of Rs 200 crore.Additionally, a capex of Rs 130 crore in the inverter business has been approved by the board.