The top limit for the on board charging electronics package is 150kW. It cannot possibly be set higher. The next few years will see dramatic increases in charging input acceptance but if you've got a '21-'23, 150kW is tops. My research did not turn up a secret fast charge button on the Porsche but since 2021, the Taycan's internal system accepts up to 270kW DC charging. That's fast. And apparently there is a $2,000 19.kW AC module available as an option that will supercharge level 2 charging.
www.motorbiscuit.com
Another nice feature is that the Porsche Taycan can charge quickly. It can take in 270 kW with a DC fast charger — more than what many Tesla models can handle. As a result, a 2021 Taycan can recharge from 5% to 80% in just 22.5 minutes when plugged into an appropriate DC fast charger, InsideEVs reports.
Because of how charging works, the Taycan can receive a lot of charge quickly, but the speed of that charging will slow as the battery becomes fuller. However, thanks to the car’s 270-kW capacity, it can take in a lot of electricity quickly. In fact, it takes only about 10 minutes to get the Taycan to 50% charge.
www.greencarreports.com

How Fast Can a Porsche Taycan Charge?
The Porsche Taycan is not only a fast car but also a fast-charging EV.

Because of how charging works, the Taycan can receive a lot of charge quickly, but the speed of that charging will slow as the battery becomes fuller. However, thanks to the car’s 270-kW capacity, it can take in a lot of electricity quickly. In fact, it takes only about 10 minutes to get the Taycan to 50% charge.

2022 Porsche Taycan charges faster on road trips, parks itself, plays well with Android
The Taycan and Taycan Cross Turismo models include tech that could help the Taycan get to its peak charge rate sooner.