Electricity prices for Greater Boston residents will fall sharply from the winter, Eversource Energy said Wednesday, although rates will increase slightly from a year ago.
The utility, which filed its summer rates with the state Department of Public Utilities, said household bills will drop about 20 percent July 1. The average monthly bill in Greater Boston will fall about $25, to $97 from winter's $122, it said. Last summer, the average household paid $95 a month.
The monthly bills of residential customers on the South Shore and Cape Cod will fall to $99 from $124 last winter and $101 last summer. Eversource has about 1.4 million electric customers in Eastern Massachusetts.
The supply cost, or the price Eversource pays for electricity, will drop from winter's 15.05 cents per kilowatt-hour to 10.05 cents, the utility said. That's higher than last summer's rate of 9.38 cents per kilowatt-hour.
In March, National Grid said its summer rates would decline 25 percent from winter's, but be higher than last summer's. National Grid's summer rate of 8.9 cents per kilowatt-hour went from May through October.