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.
Whether you are paving over your old driveway or laying a new one entirely, asphalt driveways can have significant costs attached to their construction. A standard black asphalt driveway costs between $1 and $5 per square foot, averaging $3.50.You can expect to pay between $500 and $2,500 for a 10 foot by 50 foot driveway. Larger projects may have significantly different numbers attached. For example a Â¼ mile driveway can cost $20,000 to $50,000.hether you are paving over your old driveway or laying a new one entirely, asphalt driveways can have significant costs attached to their construction. A standard black asphalt driveway costs between $1 and $5 per square foot, averaging $3.50.