The timing and price factors of installing solar panel?

1.The timing of installing Solar panel:

Typically, it takes two to three weeks for a contractor,first to initially arrange a roof inspection and obtain approval, to finally install the panels into place. Homeowners should be prepared for occasional power outages.

2.The price factors of installing Solar panel:

1)Size of the overall system.

2)Type and quality of equipment desired.

3)Geographical location.

4)Incentives in your area/country.

5)Professional installers or DIY fees, etc.