Full on certified passive house looks very silly with solar this cheap, and frankly the math used to figure out a lot of the requirements is basically faulty.
2025 Code minimum is pretty decent if it's actually complied with, and 'net zero' middle ground with triple glazing is a worthwhile upgrade.
30-50% over 500k build is 10x more than 10k solar or 5k worth of batteries.
I've just setup electrical heating for my bedroom (HA PID sensor). Uses about 450KWh - $90 NZD worth of grid power per winter. Heat pump would take 20+ years to pay itself. Double glazing probably 30-40 years.
To make same amount of solar power per year I need a single $130 NZD panel.
That's an interesting way of looking at it. I remember in the 70's baseboard heaters were very common. They use a lot of electricity, but electricity was super cheap back then. It would be interesting to compare baseboard+extra solar to heat pump+less solar. The baseboard is more reliable, so potentially would last longer.
Full on certified passive house looks very silly with solar this cheap, and frankly the math used to figure out a lot of the requirements is basically faulty.
2025 Code minimum is pretty decent if it's actually complied with, and 'net zero' middle ground with triple glazing is a worthwhile upgrade.
If you wanna spend 2-3x more, yes. Otherwise solar or grid battery is cheaper.
Try 30-50% more.
It's so obviously better to reduce your need for heating and cooling than it is to increase your panel. battery, and HVAC size.
30-50% over 500k build is 10x more than 10k solar or 5k worth of batteries.
I've just setup electrical heating for my bedroom (HA PID sensor). Uses about 450KWh - $90 NZD worth of grid power per winter. Heat pump would take 20+ years to pay itself. Double glazing probably 30-40 years.
To make same amount of solar power per year I need a single $130 NZD panel.
That's an interesting way of looking at it. I remember in the 70's baseboard heaters were very common. They use a lot of electricity, but electricity was super cheap back then. It would be interesting to compare baseboard+extra solar to heat pump+less solar. The baseboard is more reliable, so potentially would last longer.