[redpoint5]

Here's the most recent solar bid for my parents:

7.8 kW Solar Proposal
Your Annual Electricity Use 10,680 kilowatt-hours
Annual Solar Production 9,693 kilowatt-hours
20 x Hanwha Q.cell 390-watt mono solar modules with SolarEdge (1) SE7600H-US w/ (20) P400 DC Optimizers

Total System Cost $23,450.00
Oregon Solar Rebate $5,000.00
Utility Incentives $9,000.00
Your Cost $9,450.00 = $1.21/watt

Bid from same company for my house:
7.02 kW Solar Proposal
Your Annual Electricity Use 7,089 kilowatt-hours
Annual Solar Production 7,101 kilowatt-hours
18 x Hanwha Q.cell 390-watt mono split cell solar modules with SolarEdge SE6,000H-US (18) P400 DC Optimizers

Total System Cost $17,306.00
Oregon Solar Rebate $1,404.00
Utility Incentives $2,106.00
Your Cost $13,796.00 = $1.97/watt

Note that my parents is ground mount, and my house is roof mount. Ground mount has higher associated cost due to more extensive racking and concrete pouring.