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 An asphalt driveway typically costs about $2 -$5 a square foot, $1,200 - $3,000 for a 12'x50' single-car driveway; or $25,000 -$50,000 for up to a quarter mile. Do-it-yourself supplies can cost $50 -$200 depending on the size and condition of the driveway, and the quality of the sealer. 2  Professional driveway sealing can cost $200 -$500 or more.