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Summary Report
Total Electric Power
AC Scatter
Interior Conditions
Ambient Conditions

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This research site monitors the electrical consumption as well as the interior space conditions of a production built, net zero energy home. Located in Windermere, Florida, it is a single story three bedroom + flex room, two bath home with 2667 sq. ft. of living space and a HERS rating of 0. Energy consumption is offset by a 8.6 kW, split photovoltaic system (5.7kW south / 2.9kW east). It has double pane, low e vinyl windows, R-11 foam injected CMU and rigid foam wall insulation, and R-21 roof deck insulation over an unvented attic. Heating and cooling is provided by a 2 ton, SEER 19 heat pump. An energy recovery ventilator and supplementary whole house dehumidification is also provided. Platinum LEED certified, the house has all Energy Star appliances, CFL & LED lighting, water saving plumbing fixtures, and a 54 sq. ft/80 gallon active solar hot water system with on-demand hot water recirculation. It was built by KB Homes. Data collection began in April 2011. Home occupancy began in late May 2011.

Jan 14 2013, 00:15 -To- Jan 15 2013, 00:00 EST

Electric Energy Use/Production

Peak kW

Total kwh
Consumption from Utility 7.5 43.8
East PV production 1.6 7.5
South PV production 4.0 21.1
Fed back to Utility 4.6 12.6
PV used by house 4.9 15.9
Net purchased electricity 7.5 31.2

Selected Electric End Uses

Peak kW

Total kwh
Total house consumption 7.5 59.7
A/C Condenser 1.0 11.4
Air Handler 0.1 1.2
Hot water 4.9 22.0
Other 4.9 25.2

Indoor Conditions


Thermostat Temp (F) 74.1 73.6/ 74.5
Thermostat RH (%) 47.0 44.2/ 49.5

Weather Conditions


Ambient Temp (F) 70.8 62.1/ 81.2
Ambient RH (%) 77.2 48.8/ 96.5
Horz. Plane Irradiation (wh/m2) 3123.7 -1.7/ 590.1
East PV Plane Irradiation (wh/m2) -11.5 -7.8/ -0.4
South PV Plane Irradiation (wh/m2) 4614.5 0.1/ 879.0
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