If approved, a 1,000 kWh residential customer bill will decrease by $9.77ST. PETERSBURG, Fla., Sept. 5, 2024 /PRNewswire/ -- Duke Energy Florida requested to lower rates and decrease customer bills in January 2025 as part of an annual adjustment for the cost of fuel used to generate electricity at the company's power plants.The company plans to decrease Florida residential rates by approximately 6%, while making grid improvements to enhance reliability, security and resilience in 2025 and beyond. Rates for ...