The Tesla can recharge from supercharger at 135kW when battery is between 10-40% state of charge which takes 10 minutes and then tapers down to 90kW to 70% for another ten minutes, then tapers to 50kW at near 90% for another 15 minutes.
So, if regeneration is less than that many kW, you could regen for 30 minutes at 50kW no problem.
My Smart ED has maximum regen of around 25kW, less than half of the Tesla, due to a much smaller battery.