Ablation system, methods, and controllers

A multi-electrode ablation system comprising:

• a power supply configured to be coupled to a plurality of electrodes;
• and
• a controller coupled to the power supply, the controller configured to:
• determine, for each electrode of the plurality of electrodes, a desired amount of energy to be dissipated through each electrode of the plurality of electrodes during an output cycle;
• couple an output voltage of the power supply to all electrodes of the plurality of electrodes;
• determine an amount of energy dissipated through each electrode during the output cycle;
• and
• until a last electrode remains coupled to the output voltage, sequentially decouple each electrode from the output voltage of the power supply at a respective time when the amount of energy dissipated through said electrode substantially equals the determined amount of energy to be dissipated through said electrode during the output cycle.