Solar panel installation typically takes 1 to 3 days. However, the total process may take 2 to 6 months and goes through several stages:
Designing a system for your home takes 2 to 3 weeks.
Permits and inspections take 3 to 9 weeks.
Equipment ordering and delivery takes 1 to 4 weeks.
Utility connections and formal Permission to Operate (PTO) from the utility company takes 2 to 6 weeks.