The home wall box charger uses the single-phase current in your home. The fast charging should not affect the battery's life. The Nexon EV uses Tata’s Ziptron EV powertrain technology, featuring a 30.2kWh lithium-ion battery with a claimed range of 312km. It gets an 8-year standard warranty and an IP67 waterproof battery pack. The Nexon EV’s battery can be charged from 0-80 percent in 60 minutes. A home wall box charger takes 8 hours to charge it from 20 to 80 percent.
It would not be viable to install the charger in an open space due to various reasons such as damage risk, proper power source, etc. It would be better to install the charger in a proper parking space. For more details, we would suggest you have a word with the nearest authorized dealer of Tata in your city