BOSTON — Facing some of the highest electricity bills in America, Mayor Michelle Wu rolled out a new “Boston Energy Saver” program this week aimed at steering residents toward energy-efficiency upgrades — including taxpayer-subsidized heat pumps — as winter utility costs continue to hammer households.

The city says the initiative will connect renters, homeowners, and small businesses with rebates, financing programs, and one-on-one support to upgrade heating systems, insulate older buildings, and cut monthly bills. Officials say the plan could help families save thousands by tapping into state incentives and federal climate funding.

The move comes as Massachusetts customers are paying far above the national average for electricity, with many residents reporting sticker shock as rates spike heading into the cold season.

City Hall is promoting heat pumps as a key tool for long-term savings and emissions cuts. Under the program, qualifying Boston buildings can receive substantial public subsidies toward installation — part of a broader state and federal push to electrify home heating and move away from fossil fuels.

Residents can access the program through a new help desk, available by phone and online, where staff will walk them through rebates, contractor options, and upgrade steps.

But not everyone is buying the pitch. Critics say the effort amounts to another round of green-agenda spending that does little to address the underlying cost crisis driving sky-high power bills — and warn that switching to electric heat in a state already struggling with energy supply can leave families paying even more.

City officials insist upgrades, insulation, and electrification will pay off, helping families reduce energy usage and avoid volatile fuel-price swings in future winters.

The city expects thousands of households to participate over the next three years.

Residents can contact the new energy-saver hotline or visit the city’s website to get started.