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.
Average costs in Nashville to install exposed aggregate driveways in 2015 are between $4.18 and $4.74 per square foot. Depending on the size of the project, you would need to multiply that number by the amount of square foot needed. Regional labor costs for aggregate concrete driveway installation in Nashville, TN: we estimate these costs to be between $422.46 and $440.78.