Mr. Biden agrees. He even called for new power lines during his presidential campaign.
That might have helped him win the support of electric utilities, which typically give bigger campaign contributions to Republicans. During the 2020 election, the industry’s political action committees and its executives gave him $1.4 million, compared with about $1 million to Donald J. Trump, according to the Center for Responsive Politics.
In Washington, developers of large solar and wind projects are pushing for a more connected grid while utilities want more federal funding for new transmission lines. Advocates for rooftop solar panels and batteries are lobbying Congress for more federal incentives.
Separately, there are pitched battles going on in state capitals over how much utilities must pay homeowners for the electricity generated by rooftop solar panels. Utilities in California, Florida and elsewhere want lawmakers to reduce those rates. Homeowners with solar panels and renewable energy groups are fighting those efforts.
Building power lines is hard.
Despite Mr. Biden’s support, the utility industry could struggle to add power lines.
Many Americans resist transmission lines for aesthetic and environmental reasons. Powerful economic interests are also at play. In Maine, for instance, a campaign is underway to stop a 145-mile line that will bring hydroelectric power from Quebec to Massachusetts.
New England has phased out coal but still uses natural gas. Lawmakers are hoping to change that with the help of the $1 billion line, called the New England Clean Energy Connect.
This spring, workmen cleared trees and installed steel poles in the forests of western Maine. First proposed a decade ago, the project was supposed to cut through New Hampshire until the state rejected it. Federal and state regulators have signed off on the Maine route, which is sponsored by Central Maine Power and HydroQuebec.
But the project is mired in lawsuits, and Maine residents could block it through a November ballot measure.