I save $35 on every power bill. Unfortunately, if I tell everyone how it is done, Trustpower will just increase the price to compensate for their loss of revenue. Sorry about that.
I only wish we could go back to the days of power at cost price, when power boards distributed our energy needs.
No one has yet told us why the change. I can tell you; it was for the big boys to negotiate for cheap power via privatised power lines. Dream on, you will never see cheap power again.

Cedric Sutherland, Otumoetai.