Monthly Energy Production (In Kilo Watt Hr)

We have a 2.2 kW system on the roof. This graph shows the total number of kWh produced per month. You can find out more about the energy configuration of the home in the general stats area.

Calculated Energy Consumption

heating energy requirements 14 kWh/m2/year (4.44 kBtu/ft2/year)
cooling energy requirement 5 kWh/m2/year (1.59 kBtu/ft2/year)
specific primary energy requirement 65 kWh/m2/year (20.61 kBtu/ft2/year)
peak heating load 12 W/m2 3.8 Btu/hr/ft2
peak cooling load 11W/m2 3.8 Btu/hr/ft2
air tightness .47 ACH50
surface-to-volume ratio .67

 

Our Passive House by the Numbers

heating degree days 4838
cooling degree days 1278
finished floor area 260 sq. m, 2800 sq. ft
foundation continuous spread footing, insulated with 2" high density EPS foam
basement wall ICF with interior 2x4 wall, insulated with high density fiberglass
wall framing 12" wide double stud wall, 24" on center
wall insulation 12" blown in high density fiberglass
roof framing prefabricated trusses
roof insulation 24" blown in high density fiberglass
windows foam-filled fiberglass frames, double pane glazing with suspended film and eco-spacers, argon/krypton fill, .51 SHGC south, .31 N, E, W; average overall total unit U-value : .18 Btu/hr ft2 =1.02 W/(m2K)
ventilation system 95% sensible effectiveness ERV
heating system electric resistance and solar thermal hot water tank with hot water coil in ventilation air stream.
domestic hot water same
cooling system 40 SEER evaporative cooler
active system to become net zero
source energy 4.5 kW PV system
site energy 4.5 kW PV system

 

Daily Energy Production (In Kilo Watt Hr) for last 90 days

We have a 2.2 kW system on the roof. This graph shows the total number of kWh produced per day for the past 90 days. You can find out more about the energy configuration of the home in the general stats area.