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.
To remove an existing driveway, prep the surface, put down gravel and install a new asphalt driveway, Jones charges about $5 per square foot or $2,500 for a 500-square-foot driveway. Sealant. Sealing an asphalt driveway is recommended to extend its life. After the asphalt is laid, says, Jones of California Asphalt Professionals, it can take at least six months for it to fully harden and for the oils to evaporate.