You'll have absolutely no issues in a Model 3! And well timed too - this announcement was made last week:
Charging up our electric vehicle network - 14 sites live and the 15th under construction at the moment, with a couple more coming up later in the year.
Down the main highway (Burnie to Hobart - 320 km) there are 6 stall across 4 sites (soon to be 8 stalls across 5 sites) - no including Burnie and Hobart themselves which also have 50 kW fast chargers. Most of these highway ones are 350 kW.
Around the east and west coast routes (more remote, but more common tourist trails) are the Electric Highway Tasmania (EHT) there are 50 kW fast chargers with a minimum gap of about 150 km (some cases a fair bit closer).
The reason for these ones being both time and energy based is that there is only one 50 kW charger per site, as mentioned there is up to 150 km between sites, and the routes see a low traffic volume. They need to ensure that people only charge as much as necessary so that the site is available for the next person. The time charge does this. And if someone does decide to charge to 100% they will at least be providing EHT with revenue needed to increase site capacity in the future, via the time charge. (Note that all their sites also have a 22kW Type 2 AC charger, so drivers have the option of moving to this with a lower per minute charge if they want).
The sites cost (approx.) $100k each to build, EHT staff/shareholders don't draw any income, and traffic on these routes is low/seasonal. They don't expect to make a profit for years. They built the sites because they are EV owners and the sites need to exist for EV ownership to be viable in the state. Chargefox or Evie were never going to build them in these locations. So time/kWh billing is the end result.
Of the 15 sites, 2 are Evie, 2 are NextCharge, 10 (including the 6 EHT ones) are Chargefox and 1 is EasyPark (technically the charging is free but you pay for the parking space with the Easypark app).
