Making roofs more intelligent

What’s being billed as the country’s first zero energy house is steadily taking shape in Point Chevalier, Auckland, and its owners are aiming to save up to $80,000 in power costs over the next 25 years.

### July 2, 2012 @ 10:07 am
Zero energy house leading the way
By Idealog
SolarCity has partnered with owners Joanna Woods and Shay Brazier and energy consultants and eco-companies to help build the house, which aims to achieve net-zero power bills by generating as much electricity as is consumed through a blend of energy-efficient features and an intelligent solar roof. Brazier, who is also head of design and innovation at SolarCity, says the house could save between $50,000-$80,000 in power costs over the next 25 years.
“Our zero energy house protects us from the impact of electricity rate increases while safeguarding the environment for the next generation,” Brazier says. “The country needs to start thinking about making their roofs more intelligent, and start thinking about the cost of running a house per square metre, rather than just the cost of building a house per square metre.”
Read more

Zero Energy Solar from Zero Energy House Project on Vimeo.

Zero Energy Explained from Zero Energy House Project on Vimeo.

Posted by Elizabeth Kerr


Filed under Architecture, Business, Construction, Design, Economics, Geography, Innovation, Inspiration, Media, Name, People, Project management, Property, Site, Town planning, Urban design

7 responses to “Making roofs more intelligent

  1. Anonymous

    It’s a bit overstated…(a start I suppose)

    88 solar tiles on the roof. UK price list indicates that a 72-tile system is GBP22650 = NZD45000 plus commissioning and install costs, say $60K for the roof solar voltaics and another $5K-$10K for the solar water heater and the electricals and you are up around the $80K mark, so no real savings.
    True cost savings through solar continue to be elusive.

  2. Phil

    Payback period on a typical domestic solar hotwater heating system is between 2.5 and 3.5 years.

    I saw an interesting case 3 or 4 years ago where a body corporate apartment complex had fitted out their roof with solar energy and solar hot water heating systems. They remained, however, connected to the municipal network for both electricity and heating. Presumably to guarantee supply. Their “home grown” production they sold directly back to the same network supplier they were buying the services from, retaining none of their own production (which was greater than the amount of energy used by the house) for their own use. Because they sold back more than they bought, they reached their payback period and were running at a clear profit after 4 years. With the added security of a guaranteed supply. Rather clever lateral thinking.

    • Elizabeth

      Energy Efficiency: Reduce, Regenerate and Replace…

      Kevin McCloud is an advocate for the creation of energy efficient homes and so is Taranaki’s Michael Lawley ( who built a home that is completely self sufficient for electricity. See Michael’s tips on sustainable electricity use in the home and the economics of generating electricity from wind and solar energy.
      [the house pictured has unhappy ‘design’ values…]

  3. ab

    Live Now, Pay Later! This is the message being posted out to Dunedin City Council tenants by You get a free home assessment and a heatpump.., and ‘pay it off on your Rates over ten years’. On the Rates. Whose rates? DCC tenants pay Rent. As for ratepayers, if they kark it before the bills are paid off, is the balance taken out of the deceased estate? (Bye, moosh, you were a great Estate, but you’re off to the big Gated Community in The Sky).

  4. Hype O'Thermia

    Since when do tenants pay for fixed improvements to the property? Can they take the heat pump when they shift?

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