Many financial institutions offered various forms of loans, both for residential solar power system installation and for commercial businesses. For example, there were specific loans for investing in solar power systems equal to the required investment amount, with a repayment period of 7-8 years, assessed from the break-even point, and loans that require guarantees or income verification, where the borrowing criteria, credit limits, and repayment periods were not different from general loan criteria, but with special interest rates that varied across different financial institutions. Examples of various types of solar rooftop loans can be shown in Table 3.7 for commercial business and Table 3.8 for residential housing.