Here is a collection of facts that I have compiled. They are based off of my own measurements and the findings of other groups like the EPA and the Department of Energy. It is amazing how the little things really do add up.
- Over 10% of your electric bill is from phantom power.
- A 1 watt reduction in phantom power results in an energy savings of $1.00 per year (at 11.4 cents/KWH). A 100 watt reduction will net you $100/year.
- A typical mono-crystalline solar installation generates 12 watts per square foot.
- Calculate your solar electric needs by taking your average monthly electric usage / 30 days / 4.2 (full sun hours). For example, for 1000KW-hr/month of usage, you would need = 7.2 kW of solar panels to cover 100% of your electrical needs.
- Insulating and air sealing your house will reduce your energy bills by 20%-50%.
- All other things being equal, because of changes in air density, automotive fuel efficiency will reduce 10% for every 50°F drop in air temperature.