The tournament was previously known as the MiWay T20 Challenge and the Standard Bank Pro20 Series.
The Dolphins beat the Cape Cobras in the final by 2 runs to win the tournament for the first time.
At the end of the group stage, the top team qualifies for the final.
The teams in second and third take part in a play-off match with the winners contesting the final.
If a match in the knockout stage ends with a tie, a Super Over will determine the winner.