On hot sunny days like this when we are running the air conditioner pretty much all day my thoughts turn to solar power. I was wondering what the break even time was for solar, using numbers (below) for Austin, TX electricity and raw panels, retail price. I realize there are (possibly large) installation costs and other support hardware, but just as a stake in the ground for a number. I was surprised that at the top tier the payback was less than two years.
|Panel Cost||Panel Watts||Sun Hours / Day||Electricity $/KWH||Panel kWH/Year||Panel $/year||Break Even (Years)||Notes|
|$177.12||320||8||0.02801||934.40||26.17||6.77||Austin Tier 1|
|$177.12||320||8||0.05832||934.40||54.49||3.25||Austin Tier 2|
|$177.12||320||8||0.07814||934.40||73.01||2.43||Austin Tier 3|
|$177.12||320||8||0.09314||934.40||87.03||2.04||Austin Tier 4|
|$177.12||320||8||0.10184||934.40||95.16||1.86||Austin Tier 5|