Customers who choose the city’s Community Choice Electricity program as their supplier will see lower rates, according to Mayor Michelle Wu.

The rates went into effect November 2021 and run through December 2023. The program’s rates are lower than those of Eversource, the local utility provider, for “at least six months,” according to the Wu administration.

“Signing up for this program will help speed the process of Boston becoming a 100 percent renewable energy city and provide a more affordable option this winter,” said Wu, who was at the offices of VietAID in Fields Corner last week to promote the program.

As a member of the City Council, Wu and her colleagues co-wrote legislation in 2017 for the Community Choice Electricity (CCE) program, which started this past February. The program offers customers three options, which range between 18 percent to 100 percent renewable energy.

Overall, electricity prices across the state are expected to be high in the winter months. But city officials “cannot guarantee that the CCE rates will remain lower than Eversource’s Basic Service rates after June 30, 2022,” the Wu administration said in a statement.

Separately, the Wu administration, in concert with Attorney General Maura Healey’s office, warned about contracts with third-party suppliers, which have higher rates than the CCE program. A report from Healey’s office indicates third-party suppliers charged state residents $426 million more than the average utility company, and specifically target low-income residents and communities of color in Dorchester, Mattapan and Roxbury, among other neighborhoods. In Dorchester’s Fields Corner and similar areas, 42 percent of low-income residents are receiving electricity from third-party suppliers, according to Lisette Le, executive director of VietAID.

“With this winter’s rising utility costs, we want residents to be wary of scams from third-party electric suppliers and to check their bills to see if they are paying more than they would with the City of Boston or with Eversource,” Healey said in a statement.