Since February 27, 2024, credits at DTE and Consumers Energy can pay every charge on your bill except securitization charges, a small line that repays utility bonds. Unused credits move to the next month. DTE says its credits do not expire and cannot be cashed out while you stay in the program. A small monthly fuel adjustment (the PSCR factor) raises or lowers each credit.
DTE’s battery rules, dated July 1, 2026, list an export-only mode for a battery that charges only from your panels, but also say every battery must be set so it cannot send power to the grid. Ask DTE in writing whether battery power earns an outflow credit. One sentence in DTE’s tariff still says credits do not pay delivery charges, while its letter to solar customers says they do; if your first solar bill does not match the letter, ask DTE. At Great Lakes Energy the credit lowers the energy charge, not the fixed monthly charge. Indiana Michigan Power, Upper Peninsula Power, Upper Michigan Energy Resources, Alpena Power and Xcel Energy run the same state program, each with its own credit.