Project Subtitle:
Project Description:
This projects describes the steps taken to retrofit an exsiting single family home in Cupertino California to be net energy positive including daily transportation needs. The house has maintained net energy positive status for 5 years straight showing the sustainability of the approach. No major sacrifices were made in the comfort and convinienece of the household members in the process.
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Occupancy Type and Details:
Owner occupied. 4 full time occupants. 2 adults and 2 children. Both adults working. Children go to school. 5 weeks per year average unoccupied due to vacations. Occasional guests.
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Site description:
Normal suburban plot about 6000 sq ft. Street has houses on both sides. Backs to another similar house on a similar street at the back.
Materials:
House built to California Code in 1997. Nothing special. Stucco on frame. Concrete slab. Insulation is wall and attic according to code. Double pane windows. Wooden doors. Has large south facing roof suitable for solar panels. Also not of South facing windows to let in winter sun.
Energy Highlights:
All electric home. Natural gas completely disconnected for 5 years now. 2 EV charging stations - 1 level 2, 1 level 1
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Datasets and Utility Bills sources and reliability:
Completely reliable as the bills and usage data used are actual ones from PG&E.
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Energy Strategies:
Increase efficiency thorough reasonable retrofits. Electrify everything by eliminating natural gas appliances. Convert automobiles to EVs. Monitor energy usage for a year. Install net-metered solar system sized to cancel out all the used electricity over the year.
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