14. Conventional and solar alternatives are available for providing energy at a remote radar site. Use the B/C ratio to determine which method should be selected at an interest rate of 8% per year and a 5-year study period. Conventional Solar 14. Conventional and solar alternatives are available for providing energy at a remote radar site. Use the B/C ratio to determine which method should be selected at an interest rate of 8% per year and a 5-year study period. Conventional Solar