PORTSMOUTH, Va. (WAVY) — Dominion Energy’s colossal offshore wind project will cost more than originally projected, and customers will help to pay for the increase.

In a release to shareholders Monday, Dominion Energy announced the price of the Coastal Virginia Offshore Wind (CVOW) project has increased by $900 million, or 9%, bringing the total to $10.7 billion.

The regulated utility places the blame on “higher onshore electrical interconnection costs” and “higher network upgrade costs” they must pay as part of coming onto the electric grid.

The cost increase will translate to about 43 cents per month on the average customer bill according to a spokesperson.

Dominion Energy, as well as Stonepeak, their alternative investment firm financier, will also be on the hook for some of the cost overruns.

CVOW Phase 1, which involves installing 176, 800-plus-foot tall wind turbines 27 miles off the coast of Virginia Beach, is still on track to be completed by 2026.

As the largest offshore wind farm under construction in the United States, CVOW is nearly 50% complete.

Roughly 80 monopile bases are now sitting in the ocean floor. At Portsmouth Marine Terminal, the first of three, 4,300-ton offshore substations to be set up at the 113,000 acre farm site has arrived.

“The project continues to achieve significant milestones on schedule and is fully prepared for the upcoming monopile installation season this spring,” said Jeremey Slayton, Dominion Energy’s spokesperson for the Coastal Virginia Offshore Wind project. “The cost of the project still compares very favorably to other forms of new power generation, including solar, battery storage and natural gas.”

Dominion has touted that the 2.6 gigawatts of energy produced would be enough to power up to 660,000 homes and avoid the carbon emissions equivalent to the removal of one million cars off the road each year.