NZ Herald
  • Home
  • Latest news
  • Herald NOW
  • Video
  • New Zealand
  • Sport
  • World
  • Business
  • Entertainment
  • Podcasts
  • Quizzes
  • Opinion
  • Lifestyle
  • Travel
  • Viva
  • Weather

Subscriptions

  • Herald Premium
  • Viva Premium
  • The Listener
  • BusinessDesk

Sections

  • Latest news
  • New Zealand
    • All New Zealand
    • Crime
    • Politics
    • Education
    • Open Justice
    • Scam Update
  • Herald NOW
  • On The Up
  • World
    • All World
    • Australia
    • Asia
    • UK
    • United States
    • Middle East
    • Europe
    • Pacific
  • Business
    • All Business
    • MarketsSharesCurrencyCommoditiesStock TakesCrypto
    • Markets with Madison
    • Media Insider
    • Business analysis
    • Personal financeKiwiSaverInterest ratesTaxInvestment
    • EconomyInflationGDPOfficial cash rateEmployment
    • Small business
    • Business reportsMood of the BoardroomProject AucklandSustainable business and financeCapital markets reportAgribusiness reportInfrastructure reportDynamic business
    • Deloitte Top 200 Awards
    • CompaniesAged CareAgribusinessAirlinesBanking and financeConstructionEnergyFreight and logisticsHealthcareManufacturingMedia and MarketingRetailTelecommunicationsTourism
  • Opinion
    • All Opinion
    • Analysis
    • Editorials
    • Business analysis
    • Premium opinion
    • Letters to the editor
  • Politics
  • Sport
    • All Sport
    • OlympicsParalympics
    • RugbySuper RugbyNPCAll BlacksBlack FernsRugby sevensSchool rugby
    • CricketBlack CapsWhite Ferns
    • Racing
    • NetballSilver Ferns
    • LeagueWarriorsNRL
    • FootballWellington PhoenixAuckland FCAll WhitesFootball FernsEnglish Premier League
    • GolfNZ Open
    • MotorsportFormula 1
    • Boxing
    • UFC
    • BasketballNBABreakersTall BlacksTall Ferns
    • Tennis
    • Cycling
    • Athletics
    • SailingAmerica's CupSailGP
    • Rowing
  • Lifestyle
    • All Lifestyle
    • Viva - Food, fashion & beauty
    • Society Insider
    • Royals
    • Sex & relationships
    • Food & drinkRecipesRecipe collectionsRestaurant reviewsRestaurant bookings
    • Health & wellbeing
    • Fashion & beauty
    • Pets & animals
    • The Selection - Shop the trendsShop fashionShop beautyShop entertainmentShop giftsShop home & living
    • Milford's Investing Place
  • Entertainment
    • All Entertainment
    • TV
    • MoviesMovie reviews
    • MusicMusic reviews
    • BooksBook reviews
    • Culture
    • ReviewsBook reviewsMovie reviewsMusic reviewsRestaurant reviews
  • Travel
    • All Travel
    • News
    • New ZealandNorthlandAucklandWellingtonCanterburyOtago / QueenstownNelson-TasmanBest NZ beaches
    • International travelAustraliaPacific IslandsEuropeUKUSAAfricaAsia
    • Rail holidays
    • Cruise holidays
    • Ski holidays
    • Luxury travel
    • Adventure travel
  • Kāhu Māori news
  • Environment
    • All Environment
    • Our Green Future
  • Talanoa Pacific news
  • Property
    • All Property
    • Property Insider
    • Interest rates tracker
    • Residential property listings
    • Commercial property listings
  • Health
  • Technology
    • All Technology
    • AI
    • Social media
  • Rural
    • All Rural
    • Dairy farming
    • Sheep & beef farming
    • Horticulture
    • Animal health
    • Rural business
    • Rural life
    • Rural technology
    • Opinion
    • Audio & podcasts
  • Weather forecasts
    • All Weather forecasts
    • Kaitaia
    • Whangārei
    • Dargaville
    • Auckland
    • Thames
    • Tauranga
    • Hamilton
    • Whakatāne
    • Rotorua
    • Tokoroa
    • Te Kuiti
    • Taumaranui
    • Taupō
    • Gisborne
    • New Plymouth
    • Napier
    • Hastings
    • Dannevirke
    • Whanganui
    • Palmerston North
    • Levin
    • Paraparaumu
    • Masterton
    • Wellington
    • Motueka
    • Nelson
    • Blenheim
    • Westport
    • Reefton
    • Kaikōura
    • Greymouth
    • Hokitika
    • Christchurch
    • Ashburton
    • Timaru
    • Wānaka
    • Oamaru
    • Queenstown
    • Dunedin
    • Gore
    • Invercargill
  • Meet the journalists
  • Promotions & competitions
  • OneRoof property listings
  • Driven car news

Puzzles & Quizzes

  • Puzzles
    • All Puzzles
    • Sudoku
    • Code Cracker
    • Crosswords
    • Cryptic crossword
    • Wordsearch
  • Quizzes
    • All Quizzes
    • Morning quiz
    • Afternoon quiz
    • Sports quiz

Regions

  • Northland
    • All Northland
    • Far North
    • Kaitaia
    • Kerikeri
    • Kaikohe
    • Bay of Islands
    • Whangarei
    • Dargaville
    • Kaipara
    • Mangawhai
  • Auckland
  • Waikato
    • All Waikato
    • Hamilton
    • Coromandel & Hauraki
    • Matamata & Piako
    • Cambridge
    • Te Awamutu
    • Tokoroa & South Waikato
    • Taupō & Tūrangi
  • Bay of Plenty
    • All Bay of Plenty
    • Katikati
    • Tauranga
    • Mount Maunganui
    • Pāpāmoa
    • Te Puke
    • Whakatāne
  • Rotorua
  • Hawke's Bay
    • All Hawke's Bay
    • Napier
    • Hastings
    • Havelock North
    • Central Hawke's Bay
    • Wairoa
  • Taranaki
    • All Taranaki
    • Stratford
    • New Plymouth
    • Hāwera
  • Manawatū - Whanganui
    • All Manawatū - Whanganui
    • Whanganui
    • Palmerston North
    • Manawatū
    • Tararua
    • Horowhenua
  • Wellington
    • All Wellington
    • Kapiti
    • Wairarapa
    • Upper Hutt
    • Lower Hutt
  • Nelson & Tasman
    • All Nelson & Tasman
    • Motueka
    • Nelson
    • Tasman
  • Marlborough
  • West Coast
  • Canterbury
    • All Canterbury
    • Kaikōura
    • Christchurch
    • Ashburton
    • Timaru
  • Otago
    • All Otago
    • Oamaru
    • Dunedin
    • Balclutha
    • Alexandra
    • Queenstown
    • Wanaka
  • Southland
    • All Southland
    • Invercargill
    • Gore
    • Stewart Island
  • Gisborne

Media

  • Video
    • All Video
    • NZ news video
    • Herald NOW
    • Business news video
    • Politics news video
    • Sport video
    • World news video
    • Lifestyle video
    • Entertainment video
    • Travel video
    • Markets with Madison
    • Kea Kids news
  • Podcasts
    • All Podcasts
    • The Front Page
    • On the Tiles
    • Ask me Anything
    • The Little Things
  • Cartoons
  • Photo galleries
  • Today's Paper - E-editions
  • Photo sales
  • Classifieds

NZME Network

  • Advertise with NZME
  • OneRoof
  • Driven Car Guide
  • BusinessDesk
  • Newstalk ZB
  • Sunlive
  • ZM
  • The Hits
  • Coast
  • Radio Hauraki
  • The Alternative Commentary Collective
  • Gold
  • Flava
  • iHeart Radio
  • Hokonui
  • Radio Wanaka
  • iHeartCountry New Zealand
  • Restaurant Hub
  • NZME Events

SubscribeSign In
Advertisement
Advertise with NZME.
Home / New Zealand

Cities: Sunny side up

By Sophie Barclay
Other·
28 Nov, 2011 02:40 AM4 mins to read

Subscribe to listen

Access to Herald Premium articles require a Premium subscription. Subscribe now to listen.
Already a subscriber?  Sign in here

Listening to articles is free for open-access content—explore other articles or learn more about text-to-speech.
‌
Save

    Share this article

Photo / Getty

Photo / Getty

There's no denying Auckland's unpredictable weather, but we still boast around 2050 hours of sunshine a year, somewhere around the national average. And yet Auckland installs a mere 10 per cent of the national solar water heating systems being implemented around the country.

Each year we are exposed to between 20 and 30 times more solar energy than is used in our homes in electricity or gas. Solar water heating (SWH) captures this eternally renewable power to heat a day's worth of water (200 - 270 litres for the average household), storing it in a hot water cylinder. Overall solar can provide a good 50 - 75% of your annual hot water and takes just a day to install.

During the sun-drenched summer months, SWH delivers around 75% of hot water needs. Once the weather packs in, or wintry days reduce the amount of sunshine, 'backup' electricity heating keeps water at just the right temperature, banishing the cold shower blues.

Household water heating uses around 8 kWh daily, making up around 50% of the average household electricity use and one third of the energy bill. SWH produces up to 15kWh/day in the bountiful sunshine hours of summer and around 7kWh/day on a cloud-free winter's day. All in all, a SWH heating system will save 2,200 kWh of electricity and around $775 each year.

There are a whole lot of designs available for SWH systems and many of them have ENERGY STAR® energy efficiency ratings. Some SWH products, such as SolarCity's Thermocell, have been designed with extra eco-friendliness in mind. Over its lifetime, the kiwi-made and manufactured Thermocell will create 45 times more energy than was used in making it, and 90% of the product can be recycled.

Advertisement
Advertise with NZME.
Advertisement
Advertise with NZME.

The cost of installation is substantial, varying from around $4,199 (for Meridian energy customers) to about $7300 (if you are buying a new cylinder). It's best to install SWH into new buildings where the system can be most effectively designed, with rooms needing access to hot water (laundry, bathrooms, kitchen) being grouped together to avoid heat loss through pipes. A high-class SWH system will last for at least 20 years, and, given that it takes 8-10 years to pay off, you'll be enjoying free hot water for about half its lifetime. ?

The more hot water you use, the more you can reap the solar benefits. The Leigh Sawmill Brewery saves around 50% of its greenhouse gas emissions and 9,000 kWh per year by heating water used in the brewing process through SWH.

This is part and parcel of the company's environmental ethic; it also collects its own rainwater and reduces waste by giving leftover grain to local duck farmers.

Advertisement
Advertise with NZME.

New Zealand still lags far behind countries like Greece, China, Australia and Israel in terms of its SWH prowess. Following fuel shortages and the energy crisis of 1974, Israel made SWH systems compulsory.

Today 90% of houses have SWH systems, saving the country some two million barrels of oil a year. SWH will increase your property value, making it more attractive to eco-conscious homebuyers and renters.

Research suggests that for every dollar invested into renewable energy, you'll see a $20 return. SWH reduces our reliance on non-renewable, carbon-intensive electricity, particularly natural gas and coal which make up 21% of our electricity.

These are responsible for belching 370 g of CO2 per kWh and 800 g CO2 per kWh respectively, into the atmosphere. Costing less than a new lounge suite, SWH systems offer a plethora of plus sides.

Discover more

New Zealand

Andy Kenworthy takes a look inside the Draft Auckland Unitary Plan to find out how the future of Auckland might look.

26 Apr 03:06 AM
New Zealand

Cities Auckland becomes a Fairtrade City

07 Mar 02:17 AM
New Zealand

Cities: New York - the big apple turns green

05 Apr 03:23 AM
New Zealand

Cities: The Northern Brights

27 Feb 02:26 AM

Considering future predictions for global gas and oil shortages they are a smart way of saving dosh and reducing demand for electricity. Harnessing Auckland's sunshine, and producing power from your very own rooftop, is a satisfying, and sustainable, choice.

Save

    Share this article

Latest from New Zealand

New Zealand

'Serious-to-critical': Crash shuts SH1 in Northland, delays expected

06 Jul 08:48 AM
Crime

'No bad blood': Inmate apologises for shanking prison officer

06 Jul 08:00 AM
Wellington

'Exercise caution': Investigation into Kiwi's death in elephant attack

06 Jul 06:58 AM

There’s more to Hawai‘i than beaches and buffets – here’s how to see it differently

sponsored
Advertisement
Advertise with NZME.

Latest from New Zealand

'Serious-to-critical': Crash shuts SH1 in Northland, delays expected

'Serious-to-critical': Crash shuts SH1 in Northland, delays expected

06 Jul 08:48 AM

Emergency services were called to the scene about 7.45pm.

'No bad blood': Inmate apologises for shanking prison officer

'No bad blood': Inmate apologises for shanking prison officer

06 Jul 08:00 AM
'Exercise caution': Investigation into Kiwi's death in elephant attack

'Exercise caution': Investigation into Kiwi's death in elephant attack

06 Jul 06:58 AM
Police respond to assault at pool: One hospitalised, charges laid

Police respond to assault at pool: One hospitalised, charges laid

06 Jul 06:31 AM
From early mornings to easy living
sponsored

From early mornings to easy living

NZ Herald
  • About NZ Herald
  • Meet the journalists
  • Newsletters
  • Classifieds
  • Help & support
  • Contact us
  • House rules
  • Privacy Policy
  • Terms of use
  • Competition terms & conditions
  • Our use of AI
Subscriber Services
  • NZ Herald e-editions
  • Daily puzzles & quizzes
  • Manage your digital subscription
  • Manage your print subscription
  • Subscribe to the NZ Herald newspaper
  • Subscribe to Herald Premium
  • Gift a subscription
  • Subscriber FAQs
  • Subscription terms & conditions
  • Promotions and subscriber benefits
NZME Network
  • The New Zealand Herald
  • The Northland Age
  • The Northern Advocate
  • Waikato Herald
  • Bay of Plenty Times
  • Rotorua Daily Post
  • Hawke's Bay Today
  • Whanganui Chronicle
  • Viva
  • NZ Listener
  • Newstalk ZB
  • BusinessDesk
  • OneRoof
  • Driven Car Guide
  • iHeart Radio
  • Restaurant Hub
NZME
  • About NZME
  • NZME careers
  • Advertise with NZME
  • Digital self-service advertising
  • Book your classified ad
  • Photo sales
  • NZME Events
  • © Copyright 2025 NZME Publishing Limited
TOP