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Tennessee Valley Authority's energy comes from hydroelectric. Hydroelectric is the largest source of electricity, providing 100% of Tennessee Valley Authority's energy.
100%
Hydroelectric
Residential systems installed prior to October 1, 2023 and all non-residential systems: Credited to customer's next bill at retail rate; granted to utility at beginning of summer billing season Residential systems installed on or after October 1, 2023: Monthly net excess generation credited at the avoided cost rate