The Government will today announce energy-efficiency plans it says will improve business productivity and reduce carbon emissions while saving money.

A power company is offering the chance to pay all household costs in one bill - but consumer groups warn the convenience may come at a cost.

A New Zealand-based biotech firm with links to Barack Obama's re-election campaign manager is moving to North America.

Z Energy is banking on biodiesel users paying a premium for the fuel it plans to produce at an Auckland plant using animal fat.

Z Energy plans to spend $21 million on a biodiesel plant in Auckland using fat from the meat industry.

Five research reports into the value of Genesis Energy shares have been released by the NZX this morning. Read them all here.

New Zealand-founded bio-fuels innovator LanzaTech has attracted US$60 million in its latest capital-raising round,

The Treasury would have liked more "Mum and Dad" small investors to have bought shares in electricity generators Mighty River Power and Meridian Energy.

A new report discussing the potential to move toward a green economy says New Zealand should "carefully review its direction of development".

The NZ Super Fund is taking a punt on US oil and gas exploration - putting nearly $300m into a private equity energy fund.

On Monday week we will get the carefully considered collective view of hundreds of experts on the likely impacts of climate change, including the impacts on New Zealand.

A leading United States-based maker of advanced solar power system inverters hopes to expand its research and development centre in New Zealand.

Genesis Energy could end up being the most costly sale in the Government's partial privatisation programme as a proportion of its proceeds.

Most households could easily cut their power bills by 10 per cent by making small adjustments, energy conservation experts say.

The Government says shares in Genesis Energy will be priced in a $1.35 to $1.65 range and would include a loyalty bonus share offer.

The average power bill for a family of four will rise by 2.4 per cent this year, Energy and Resources Minister Simon Bridges said yesterday.

Investors wanting more certainty around Labour-Greens policy for overhauling the electricity sector before the election appear to be out of luck.

Independent research house Morningstar has valued state-owned Genesis Energy at around $1.69 billion to $1.89 billion in total, or about $3.25 to $3.50 a share.

The operator of a Northland geothermal plant has denied Fire Service reports 30,000 litres of gas is leaking after an explosion at the site.

Mighty River Power remains on track to meet forecast full-year profit for the year but is wary of falling lake levels feeding its central North Island hydro dams.

The structure of the Genesis Energy float is unusual but makes sense given the complexities of the company, says one investment banker.

The sharemarket float of Genesis Energy - the details of which are due out today - is likely to proceed along standard lines.

John Key has confirmed the partial privatisation of Genesis Energy will begin soon but has underlined the sale will be the last one under a National Government.