Grid growth from large loads could modernize power systems — if costs are shared

Big new power users are both an opportunity and a pricing problem

Rapid growth in large electricity loads can help modernize the U.S. grid, but only if those customers are integrated transparently and made to pay their share of the underlying system costs. That is the central conclusion of a new report from Concentric Energy Advisors, which argues that large-load demand can justify major infrastructure upgrades while also warning that poor cost allocation could leave everyone else with the bill.

The debate is timely because utilities across the United States are confronting surging demand from power-hungry facilities, even as they face their own baseline need to strengthen networks against complexity and extreme weather. In that environment, new load growth can look attractive: a bigger customer base can help spread fixed costs and support investment in transmission lines, substations, and modern grid technologies.

Concentric’s report makes exactly that case. It says customers with very large loads can help advance real-time monitoring, automation, and control, all of which matter for reliability and a more capable grid. But the same report also warns that if those customers do not cover their appropriate share of fixed costs, the resulting burden on other users could be enormous.

The scale of the cost-shift warning

According to the report, if large-load customers fail to pay their fair share of fixed grid costs, the nationwide transmission cost shift to other customers could total between $120 billion and $169 billion over 30 years. That estimate is striking because it captures a core tension in the current grid buildout: new demand can support investment, but only if regulators and utilities structure rates and interconnection responsibilities carefully.

The report argues that capital investment would be needed even without new large loads because the system is already under pressure. Added complexity, aging infrastructure, and increasingly severe weather all require utilities to spend more. In that sense, large-load growth is not the sole cause of higher grid costs. The question is whether it becomes a stabilizing force that helps fund those upgrades or a source of subsidy that pushes costs onto households and smaller businesses.

Concentric’s position is that grid-connected large loads generally help support the fixed costs of maintaining and modernizing the system. The warning applies when policy or rate design lets those customers avoid a substantial share of those obligations.

Investment is already accelerating

The report arrives as utility spending continues to rise. It cites U.S. Energy Information Administration findings that annual spending by major utilities to produce and deliver electricity increased by 12% from 2003 to 2023 in real 2023 dollars. It also cites Edison Electric Institute projections that U.S. electric utilities will invest $239 billion this year to strengthen and expand the grid.

Those numbers underscore that the buildout is already happening. The real dispute is how the next wave of demand should be integrated. For utilities, very large customers can improve load growth assumptions and support bigger projects. For regulators and consumer advocates, the concern is whether special arrangements undermine fairness or create stranded risks for existing ratepayers.

The report also notes that on-site generation can serve as an interim solution while projects wait for full interconnection, but says widespread reliance on off-grid systems is not a durable long-term path. That point matters because some large customers are exploring self-supply options to avoid grid delays. Concentric’s argument is that durable reliability and resilience still depend on coordinated utility planning and shared infrastructure.

Why this matters beyond utilities

The issue reaches beyond rate design because it touches the future shape of the power system. If large new loads are integrated well, they can accelerate modernization that benefits many users. If handled poorly, they can intensify public backlash over bills and slow the political support needed for grid expansion.

The report therefore lands in a sensitive policy space. Utilities often emphasize the economic benefits of load growth, while critics worry about cross-subsidies and opaque negotiations. Concentric is trying to reconcile those views: yes, large loads can be an asset, but only if planning is integrated and the allocation of costs is explicit.

That is likely to become a defining question in energy regulation over the next several years. The grid is being asked to do more at once: accommodate new demand, harden against weather, modernize for flexibility, and preserve affordability. No single customer class can solve those pressures, but very large loads can either ease or worsen them depending on the rules.

A conditional case for growth

What the report does not say is that all load growth is automatically good. Its endorsement is conditional. The benefits appear when projects are transparent, grid-connected, and responsible for the costs they impose. Without those conditions, the modernization story becomes a cost-shift story.

That distinction is likely to shape upcoming fights over interconnection, tariffs, and infrastructure investment. As utilities spend hundreds of billions of dollars and new power demand continues to emerge, the challenge will be to capture the scale benefits of growth without turning existing customers into involuntary backstops.

Concentric’s message is simple enough to travel: large loads can help build the future grid, but only if they help pay for it.

This article is based on reporting by Utility Dive. Read the original article.