The average solar energy system size in the U.S is approximately 5 kilowatts (kW). Based on the average price of $3.36/watt, a 5kW system would cost $11,760 after tax credits. Below are some average 2015 quotes for other solar energy systems by size: 6kW solar energy system cost: $15,000. 8kW solar energy system cost: $20,000.
Pros: 1  Economical option. Homeowners appreciate the sleek appearance of an asphalt-paved driveway at a lower cost than concrete or paver surfaces. 2  Flexible in extreme climate conditions. Asphalt driveways typically cost $2 - $5 per sq foot to install - more than gravel, but much less than many other options. 3  Long lifespan.
1 For a 500 square foot (50 x 10) driveway this works out to an average cost of $2500. 2  A Macadam driveway, also known as tar and chip, consist of crushed stone or gravel sprayed with liquid asphalt. 3  They cost around $2-$5 per square foot. 4  Another option is a cobblestone driveway.