The Grid-Tie Power generator (optional for model 46122) enables the connection of the induction generator from the trainer to the grid and returns power proportional to the wind simulation in the system. The Grid-Tie Power generator option contains a soft-starter, an overload, switchable compensation capacitors, and a power meter which allows the user to monitor several parameters of the power sent back to the grid (VAR, W, VA, Power Factor , etc.).