1. 29/30 January 2007Remodece Prague1 Remodece Energybox Progress Report Swiss Experience with Household Electricity Conrad U. Brunner S.A.F.E. Swiss Agency for Efficient Energy Use Zurich/Switzerland www.energy-efficiency.ch www.energybox.ch

2. 29/30 January 2007Remodece Prague2 Survey by Swiss Utilities First Survey 1996: 1500 households Electricity: consumption kWh/a from metering Second Survey 2004/05: 1500 households Electricity: consumption kWh/a from metering Questionnaire: Equipment Some behavior Results & Problems: Only aggregated data published (privacy) Calculations for disaggregated consumption (lighting, cooking, etc.) Problems with typology of equipment (electric heating, hot water, etc.)

3. 29/30 January 2007Remodece Prague3 Energybox Last release 2005 equipment (number, age) behavior complete consumption calculated/metered proposition for improvement Statistical analysis of survey: 1‘500 in 2006 New release 2007 total consumption focus on individual fields of energy consumption statistical analysis off survey: 20‘000 in 2007 (8’000 complete/plausible) Bias Discussion with Utility survey Comparison with national household average

4. 29/30 January 2007Remodece Prague4 Questions User habits

5. 29/30 January 2007Remodece Prague5

6. 29/30 January 2007Remodece Prague6

7. 29/30 January 2007Remodece Prague7

8. 29/30 January 2007Remodece Prague8 Total Electric Consumption ? General uses outside apartment: auxiliary heating, lighting for stairs, corridors, outdoors yes/no: electric hot water 3‘600 kWh/a yes/no: electric heating 7‘500 kWh/a yes/no: electric cooking 350 kWh/a What few people have: Aquarium, sauna What almost everybody has: 3‘300 kWh/a Lighting, refrigerator/freezer, washing/drying, cooking/baking/dish washing, telephone, TV, audio, settop box, home office, games, AC/DC trafo charger stand by, etc. general use 12 % 36 % 90%

9. 29/30 January 2007Remodece Prague9

10. 29/30 January 2007Remodece Prague10 Problem Nr. 1: Bias of Survey and Monitoring Results Theory of the clean survey Random selection Representative panel No “other” goals (like energy efficiency) Reality Gifts to clients (money, electricity, gadgets) Panels (used regularly) People with internet access People who give you access to apartment People who tolerate metering equipment in their apartment People you know (your friends and colleagues) People who spend 30 – 60 minutes on a questionnaire Households near your office Advertise in environmental magazines

11. 29/30 January 2007Remodece Prague11 Problem Nr. 2: Calculation vs. Metering Market survey for individual categories Historical data for existing equipment 1985 - 2005 Calibration with known households Plausibility checks Reported metered data: client does not know how to read it properly kWh/money (fixed elements, kW peak, kVAr, taxes, etc. Period (year, 3 or 4 months) Acconto/annual accounting Elements included/not included (washing..)

12. 29/30 January 2007Remodece Prague12

13. 29/30 January 2007Remodece Prague13

14. 29/30 January 2007Remodece Prague14 Problem Nr. 3: New Products & Habits Entertainment & home worker Cameras, photo printers Power drills Lawn mower, blowers Toys Kid‘s toys Grown up toys Communication Wireless phone Satellite dish Fax (dying) Safety External lights Habits Eating in restaurants Holidays and weekend Home office Less “regular family” households

15. 29/30 January 2007Remodece Prague15 Who wants to use Energybox? What for? The questionnaire The Excel background calculation (Swiss calibration) The graphs The navigation (user interface) The database (individual data storage) The energy efficiency improvement (www.topten.info)

16. 29/30 January 2007Remodece Prague16