Lillian Cusumano said she had flu-like symptoms and a "stabbing headache" after the so-called smart meter was installed at her Addison Township home more than a year ago. Her husband, Dominic, said he put the old meter back on the house.
Smart meters allow utilities to monitor electricity use without sending a reader to each house. DTE denies that the high-tech meters are a health threat.
The company is proposing a one-time charge of $87 and $15 monthly fees for customers who don't want them.
The lawsuit in Oakland County is on hold while state regulators consider DTE's opt-out policy.