The Ather 450X has caught the imagination of consumers looking for a high-performance, connected two-wheeler in India's fast-changing electric vehicle market. With a new factory, the success of the new scooter, and expansion into several cities this year, Bengaluru's Ather Energy is ready to move into serious production mode. 'Positive unit economics' have kicked in too, Ather's cofounders, CEO Tarun Mehta and CTO Swapnil Jain elaborate on everything going on at the EV maker