Power company Mercury is converting a former gas generation site into a solar panel and battery research centre.

Oil prices tumbled on signs that Saudi Arabia and Iran continue to disagree over output limits ahead.

Seabed mining is back in the spotlight as Trans Tasman Resources submits second application for consent to mine off the South Taranaki coast.

Many of us are notorious for eating lots and ditching all our self-imposed diet and exercise rules on the weekends.

Wall Street dropped with the price of oil after reports from OPEC and IEA showed the global glut won't abate any time soon.

COMMENT: The science is clear: we must rapidly transition from fossil fuel energy. But industry won't let this happen without a fight.

Oil jumped before giving up some of the gains as a deal between key producers Saudia Arabia and Russia stopped short of offering an actual limit on output.

Falling demand - not an oil shortage - will create the energy industry's next revolution.

The cash-poor state can do only so much to shore up its sinking coasts.

US federal plan to preserve habitats and accommodate industry makes few happy.

There are signs that electricity demand may be starting to grow again after a long period of declne.

Wall Street rose to records as shares of Macy's and Kohl's rallied, while oil prices gained.

Auckland-based Mercury has swapped its Roman god logo for a bee.

Efficiency moves by industry deliver financial savings.

Trustpower may now have to pay nearly $15 million in tax and interest after losing a Supreme Court appeal.

Tesla may well stumble because it is trying to do too much too fast, but Musk's vision is sound.

Z Energy is moving away from supermarket docket discounts to instant savings for Fly Buys members.

Consumer prices rose less than expected in the June quarter as cheaper meat and domestic airfares offset a recovery in petrol prices

COMMENT: The number of New Zealand households generating their own electricity from the sun climbed 77 per cent.

Switching power companies has hit a record and new figures show Kiwis could be better off if they change suppliers.

The New Zealand division of British Petroleum more than tripled net profit in 2015.

The New Zealand division of ExxonMobil narrowed its 2015 loss even as revenue dropped 15 per cent.

Helen Twose talks to three winners of this year's EECA Awards for energy efficiency.

Prices have been moving up recently and they augur higher prices at the pump for consumers.

King Country Energy has warned the Electricity Authority's planned overhaul of grid charges will increase prices.

Z Energy is confident of the savings it can make from the $785m acquisition of Chevron's Caltex and Challenge! chains.

Homes in west Auckland are without power after a car hit a transformer.

Energy Minister Simon Bridges says the abundance of renewable electricity has made New Zealand complacent about energy productivity.

Z Energy is about to open the country's first commercial scale biofuels plant in a bid to become part of the emissions solution.