A West Coast iwi has defended its decision to accept money from Meridian Energy for advice on the effects of a $300 million hydro dam.

Meridian Energy paid money to the local West Coast iwi after the iwi changed its position on a $300 million hydro dam.

Mayor Pat McManus says there's no shortage of water on the West Coast and the 'silent majority' of locals support the proposed Mokihinui dam.

Earth Hour tomorrow night is intended to unite people and communities against climate change but global warming grinches plan to leave their lights on.

It pays to shop around for better bottom lines on power bills, new Ministry of Economic Development figures reveal.