"These more than $27 billion in investments are significant and would advance the grid and transmission improvements that a clean energy transition requires, but there is more needed to modernize this critical part of power infrastructure," WRI analysts wrote. "The Infrastructure Investment and Jobs Act falls tens of billions of dollars short of the scale of investment proposed in the American Jobs Plan, and the hundreds of billions of federal and private funds needed to prepare transmission systems to meet the nation’s low-carbon goals."
Transmission and distribution deficiencies are chief concerns for renewable energy developers, especially as recent studies indicate that they are unfairly burdened with upgrade costs.
Ryan Prescott, head of growth strategy and energy storage business development at Enel Green Power, an international renewable energy developer with a global portfolio of 49.9 GW, said the grid's limitations impact resiliency and complicate siting for new renewable projects, which can slow deployment.
"It's not a dearth of good sites; it's really a dearth of good sites that have the right supportive infrastructure that is built around them," Prescott said in an interview. "So, you're seeing this suboptimal siting effort from our industry, largely because we're sort of forced to based on the infrastructure that exists right now.
"We certainly haven't maxed out the ability of the grid, but we've really started to put some pressure on it."
Prescott said that federal investment must be coupled with a philosophical change of mindset in how the grid is designed. That means planning new transmission and distribution infrastructure around the best wind and solar resources, with the knowledge that there's going to be a larger share of distributed resources and flexible load.
"In many ways, the transmission planning and interconnection of utility-scale renewables is still stuck philosophically in the past," he said. "It's a large hub and spoke system that foresees a very small number of large generators connecting to the grid every single year; those large generators paying for a substantial amount of new transmission infrastructure. That's just not really how the grid is being built right now."
The Federal Energy Regulatory Commission, in addition to Congress, could take sizeable steps to create the grid of the 21st century, experts say.
Joshua Rhodes, a research associate at the University of Texas Energy Institute, believes federal leaders could empower FERC to site interstate transmission lines, as they do with oil and gas pipelines, to streamline upgrades.
"The grid will need trillions of dollars of investment just to maintain the status quo, and even more to evolve to where we need it to go," Rhodes told Renewable Energy World. "Grid investment has always been a more local affair, but the federal government can help by providing seed funding and grants to nudge the development of the grid to a better place."