Why do I oppose
todays photo voltaic solar cells?
You answered your own question, "Once they [PV] become more efficient and cost a lot less".
Today your money could be more wisely spent on making your home
more energy efficient.
If your home uses natural gas, fuel oil, or propane for heating and if your home uses more than 4700 kWh per year of electricity you do not have an energy efficient home. You can achieve this home energy efficiency with todays made in America products at a very low cost.
Your homes Energy consumption can be reduced by up to 85% when1. Insulation is increased, R24 walls and R50 ceiling
2. air infiltration is eliminated,
3. Other thermal performance improvements, (windows, attic venting, window shading) are made.
4. Ground Source Heat Pumps (GSHP) with solar thermal assist are installed. and/or
5. Active and passive Solar Thermal (ST) whole house heating is implemented.
Your results may vary.Pickens says build wind mills to replace natural gas electricity power generation plants so that natural gas can fuel Americas vehicles.
There are other electricity demand factors to consider.
The chart below shows the real estate bubble in terms of new home construction and population. The chart shows that more homes were built than have been needed based on historical trends.

http://www.census.gov/const/startsusintenta.pdfhttp://www.census.gov/const/www/quarterly_starts_completions_cust.xlsNow we should see a electricity demand bubble as well.. The chart below does not show a bubble. This is because apartment vacancy rates went up
http://www.danter.com/STATISTICS/rentvac.htm as new home occupancy went up. The new homes electricity breaker was turned on while the apartments breaker switch was turned off. But then you ask why has electricity prices gone up in the last couple of years? The chart below shows that natural gas costs to the utility companies has quadrupled since 2003.

http://www.eia.doe.gov/cneaf/electricity/epa/epat7p2.htmlhttp://www.eia.doe.gov/cneaf/electricity/epa/epat4p5.htmlThe below chart shows that the electric utilities have nearly tripled there natural gas consumption while the price for natural gas has doubled.

http://www.eia.doe.gov/cneaf/electricity/epa/epat4p5.htmlWhile, coal consumption and costs to the utility companies has remained virtually constant for 13 years, as the chart below shows.

http://www.eia.doe.gov/cneaf/electricity/epa/epat4p5.htmlAnd this is why electricity rates have gone down over the last 18 years, inflation adjusted to 2006, and are tilting upwards and skyrocketing in some regions.. Reliable data has not yet been compiled by the EIA for 2007 and 2008 to show the electricity rate increases but some of your electricity bills do. In Missouri electricity rates have barely changed.

http://www.eia.doe.gov/cneaf/electricity/st_profiles/sept08ca.xlshttp://www.eia.doe.gov/cneaf/electricity/st_profiles/sept08az.xlshttp://www.eia.doe.gov/cneaf/electricity/st_profiles/sept08ny.xlshttp://www.eia.doe.gov/cneaf/electricity/st_profiles/sept08fl.xlshttp://www.eia.doe.gov/cneaf/electricity/st_profiles/sept08mo.xlsThe chart below shows an upper Midwest home energy costs using a 9 SEER A/C and a natural gas furnace and a hot water heater is replaced by a solar assisted GSHP.

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