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 Also called tar and chip or oil and stone, macadam driveway can cost $1 -$3 or more a square foot on an existing driveway, or $600 -$1,800 for 12'x50'; and $2 -$4 or more a square foot for a completely new driveway with gravel base, or $1,200 -$2,400 for 12'x50'.ad it shimmed to level it with larger stone asphalt, they spread that and rolled it and then 1.5 inches of asphalt applied on top of that whcih was spread and rolled. Driveway is 270 feet by ten feet so this works out to be 2700 feet and the cost for the overlay came out to about 1.40 per square foot.