CALCULATING SOLAR

[Karen Margrave]

I own a 4400 sq. ft. house which has a 2100 sq. ft. guest house in Redding, CA. With the rising cost of electricity, I am considering solar. Also, because both buildings are on one meter, it kicks it up to Tier 4, the priciest, very fast. 

The house is on PG&E. My dilemma is that PG&E won't tell me how many kwh the house averages for me to be able to do any type of calculations, because the power is in the tenants names. They won't even give me a rough estimate based on the size of house, etc. as to what it should be, etc. 

Does anyone know of a formula based on the square footage of a house to try to figure out what would be required in the way of solar panels to generate 100% of the electric from the solar?

I have 20 acres, and Redding is one of the sunniest cities in America, therefore; plenty of sun. I could do banks of panels on the ground, or on the roofs (which are south facing) Also, the house is very well insulated, has attic fans, etc., as are the garages and the guest house.

I know new nano technology coming on soon, but who knows when?

Has anyone ever achieved 100% from solar?

Does anyone else have a large house they use solar on? 

Costs?