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.
Cost of a Concrete Driveway. Longer-lasting, less maintenance, and cost-effective are the top three attributes of driveways installed with decorative concrete.Driveway costs can range from $6 per square foot to more than $15 per square foot depending upon the design and coloring effects desired.ost of a Concrete Driveway. Longer-lasting, less maintenance, and cost-effective are the top three attributes of driveways installed with decorative concrete. Driveway costs can range from $6 per square foot to more than $15 per square foot depending upon the design and coloring effects desired.