Energy Minister Megan Woods said it will make pricing fairer.
"There are insufficient generation and reserve offers and transmission capacity to meet demand."
Thousands of Kiwi households were left freezing after the surprise outage.
"Apologies and even rolling heads will not be enough."
Genesis said not firing up a Rankine at Huntly was an operational, not commercial, decision.
Investigations are underway to find out why thousands of households were plunged into darkness without warning.
Thousands of households were plunged into darkness on Monday night after demand for electricity reached an "all-time high".
There's still not much information about what caused the lack of generation.
Tens of thousands of homes went black on Monday night.