According to Electrek, a Tesla spokesperson said that the upgrade of V2 Superchargers will enable charging at up to 150 kW, which is 5 kW more than the previously announced upgrade to 145 kW.
Originally, the Superchargers were rated at 120 kW, so the final increase will be 30 kW or 25% to 150 kW.
As we understand, Tesla is unlocking the full potential of currently installed Superchargers after years of utilization, which proved it's possible and safe.
The new generation of Superchargers - V3 are rated at 250 kW and sends all the power to a single stall instead of a power split between two stalls like in V2.
The rollout of V3 is already progressing.
To be able to use all the power from the charging infrastructure, Tesla released a special feature - On-Route Battery Warmup, which keeps the battery in the optimum temperature for fast recharge:
"New Supercharging infrastructure isn’t the only way we are improving our customers’ charging experience. Beginning this week, Tesla is rolling out a new feature called On-Route Battery Warmup. Now, whenever you navigate to a Supercharger station, your vehicle will intelligently heat the battery to ensure you arrive at the optimal temperature to charge, reducing average charge times for owners by 25%."
That's on the side of the infrastructure, but the actual charging power depends also on the particular version of the car.
The Tesla Model 3 is able to charge at up to 250 kW, which means full power from V2 and V3 Superchargers.