I drive a Tata Nexon EV 30kwh battery, 3.5 KW charger which I bought for Rs 1.6 million (16 lakh). The new ones with 40kwh battery, 7 KW charger costs Rs 1.9 million (19 lakh). On road is lesser due to subsidies (not sure if there are any active subsidies).
Tata Tiago is priced much lesser. I would be vary of range as advertised (unlike many other countries). My car gives me practical range of 220 kms and the advertised range is 312 kms. I drive at 115 to 125 WH per km, my wife drives at 135 to 150 WH per km.
Auto websites are a much better source of prices.
See: https://www.cardekho.com/tata/nexon-ev-prime
However, there are cheaper EVs available from the Tata stable, such as Tigor EV for under 12 lakh, so the point stands.