Automakers are rolling out the biggest festive discounts of 2026 ahead of Diwali, with electric cars seeing unprecedented price corrections of up to ₹3.35 lakh. Leading the charge are massive cash discounts and exchange packages on the Tata Curvv EV, MG ZS EV, Tata Punch EV, and Mahindra XUV400. Here is your definitive festive EV buying guide with variant-wise offers, dealer negotiation strategies, and state subsidy advice.