Genesis is the last of the three state-owned power companies slated for partial privatisation and could yet beat its larger competitor, Meridian Energy, in offering up to 49 per cent of its stock to the public.
A crucial Supreme Court decision on the government's asset sales programme is due in the next three days and will determine whether Mighty River Power can go to market.
The combined impact of the various factors flowing in Genesis's favour in the latest half also saw net operating cash flow improve by 50 per cent to $218 million.
The company has no plans to build new generation plant in the near future and, like other electricity companies, sees wholesale prices remaining depressed for some time to come.
However, it's committing between $145 million and $155 million to upgrading the canal system at Tekapo over the next two years, which will involve two 14 week outages.
The company expects net profit after tax for the financial year ending June 30 2013 to exceed NPAT for the first half, although planned outages at Tekapo will affect generation capacity.