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Home > Example Homes > Taramea Passive House

Taramea Passive House

Home Details

Land Area
4000 m2
Building area
155 m2
Year built
3 bedroom(s), 2.5 bathroom(s)

Built with SIP Smart Panels and constructed by Climate House. The Home is certified passive house, net zero with extra capacity of 50km(10kWh) of free electric driving in power generation for 6 months from solar panels. With alpine winters down to -10 degrees at night the home still requires 'no heating' at all to remain at 22 degrees throughout the home. The home has no heating system installed, as not required due to levels of insulation, joinery performance and air-tightness. See the entire build process here.

Solar Panels

  • 3.6kW Solar Power System
  • Schneider 5kw inverter 3.6kw
  • 14 solar panels
  • The system is battery ready but not installed.

Solar Panels produce about 11kWh on a blue sky day in middle of winter - now about 14.5kWh in August and expecting about 26kWh in middle of summer (all blue sky outputs) - on a very grey rainy day the production is negligible maybe 1-2kWh but you only need a few hours of cloud break to gain a few extra kWh.

Home total living energy consumption is about 10kWh per 24hr day including water pump. We are home office as well so home actively used from 7am to 11pm 

The home in the middle of winter costs about $3-4 per day in total energy costs - living, office, hot water, water pump etc. 

We exported equivalent of 12 days energy use back to the grid over 31 days in July (middle of winter) so a storage battery would be an interesting consideration. 

Note the outside temperature during this time is from about -7/0 degrees at night to +2/+7 during the day, and the home remains in a temperature range of 20-24 degrees 24hrs a day with no heating system installed.

Hot Water Info

Hot water is part of the Mechanical Heat Recovery Ventilation unit with a 185 litre tank and via a exhaust air heat pump (being fed 20+ degree air to the compressor) produces domestic hot water with only 100-200 watts - so works very well being fed off the electric solar panels. We went with this model over solar tubes as solar electric investment has more applications around the home. 

Electric Car 

Outlander PHEV - Needed 4wd for where we live and also able to travel 500km (so petrol still important).

We do 95% of our weekly travel in full electric and sometimes due to multiple trips end up using a bit of petrol. 

eMotorWerks juice point is our 10kWh charger - we can charge at 3.6 kwh so takes about 3 hrs to charge 50km. The car on board charger kit is 1.5kWh and technically better suited to using power from the solar panels but we would use more petrol when both using the car each day as would not charge quick enough. 

Comparison to Code Built Home  

Our heating demand is virtually zero, as no heating source is used over winter,  if we had build to code we would have needed to generate 30,967 kWh/year to keep the home +20 degrees, 24hrs, 365 days a year through electric, heat pumps, fires etc.

Our home living electricity uses 3,650 kWh per annum and our car uses 3,650 kWh per annum for 50km of commuting travel per day. A total of 7,300 kWh per annum.

To conclude all of our car and home energy consumption is still only 20% of 'just' the heating & cooling requirements of a code built home. So you could have 5 of these Climate House homes and Electric cars for every one code built home with car when looking at energy consumption. 

Photo credit Jodie Lynes from Hide & Seek

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