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.
Asphalt is generally much cheaper to install than concrete. On average, the cost per square foot for blacktop will be considerably cheaper than concrete. However price fluctuation due to the cost of crude oil can affect an asphalt drivewayâs price. Maintenance costs for blacktop can be higher than a concrete driveway due to it requiring a sealant be applied more often. Concrete has many factors that can increase itâs cost.