For clearing the tanks above lvl.2 manually you need a certain amount of Tank Technology points and level of your tank. Every day you get Tank Technology points regardless of wins or losses or even playing Tank Trials. If a player starts late on the server or reaching level 35 with his character, will have no disadvantage.
Day 1-15 of Tank Trials Start: 20 Tank Technology points
Day 16-30: 18 Points
Day 31-45: 16 Points