Who Knew? Solar and Battery Storage Now Account for 91 Percent of New US Power Capacity
By Keith Reynolds | Publisher & Editor, ChargedUp!
The short version: Solar and battery storage made up 91 percent of all new US electricity-generating capacity added in the first quarter of 2026, the highest quarterly share the two have ever recorded, according to the Solar Energy Industries Association and Wood Mackenzie. In May 2026, solar generated more electricity than coal for the first time in US history. The reason is straightforward: these resources are among the cheapest and fastest to build, which is why utilities, businesses, and investors keep choosing them. For an owner, the figure signals that distributed and renewable power is now the default new supply, and capital is treating commercial solar as a distinct asset class.
Key Facts at a Glance
Solar and storage were 91 percent of new US generating capacity added in Q1 2026, the highest quarterly share on record, per SEIA and Wood Mackenzie.
The US added 7.8 gigawatts of new solar in Q1 2026 and passed 6 million cumulative installations.
In May 2026, solar generated more electricity than coal for the first time in US history; solar now supplies about 13 percent of US electricity.
Utility-scale solar contracts rose 15 percent year over year, driven by tech companies securing power for AI data centers.
On July 9, 2026, California's battery fleet discharged a record 12.99 gigawatts, covering 36 percent of regional demand during the evening peak.
What Do the New Capacity Figures Show?
The scale of the shift is documented. Solar and energy storage combined to account for 91 percent of all new electricity-generating capacity added to the US grid in the first quarter of 2026, the highest quarterly share the two technologies have ever recorded, according to the Solar Energy Industries Association. The country added 7.8 gigawatts of new solar in the quarter and surpassed 6 million cumulative installations. The trade group, working with the data firm Wood Mackenzie, attributed the dominance to a simple fact: solar and storage are among the lowest-cost and fastest-to-deploy resources available, which is why utilities, businesses, and investors keep choosing them.
A second milestone underlines the change. In May 2026, monthly electricity generation from solar exceeded generation from coal for the first time in United States history, and solar now supplies roughly 13 percent of the nation's electricity, up from a negligible share a decade ago, per SEIA. The generation and capacity records ran across regional grids from California to Texas to the Midwest, driven by competitive costs and fast installation timelines.
Why Are These Resources Winning?
The dominance is not primarily about environmental preference. It is about cost and speed, the two variables that decide what actually gets built when demand is rising and power is scarce. Solar and storage can be permitted, financed, and installed far faster than a gas plant or a nuclear unit, and they have become price-competitive with conventional generation in most markets. When a utility or a large energy buyer needs new supply quickly, these are increasingly the only options that can meet the timeline.
Demand from data centers is accelerating the trend. Contracts for utility-scale solar rose 15 percent year over year, fueled by technology companies securing power to meet growing AI-driven electricity demand, according to SEIA and Wood Mackenzie. The same AI buildout that is straining the grid is also driving the largest buyers toward the fastest available power, which is solar paired with storage. Storage is the piece that makes solar dependable: on the evening of July 9, 2026, California's battery fleet discharged a record 12.99 gigawatts, covering 36 percent of the region's demand during the difficult post-sunset peak. Batteries now routinely shift midday solar into the evening, turning an intermittent resource into one that performs when the grid needs it most.
What Does This Mean for a Property Owner?
The 91 percent figure changes the strategic backdrop for any owner thinking about onsite power. Distributed and renewable resources are no longer an alternative to the conventional grid; at the margin, they are the grid's new supply. That has two practical consequences. First, the equipment, financing, and installer base for commercial solar and storage are scaling rapidly, which lowers cost and shortens timelines for an owner who wants to add onsite generation. Second, the same resources an owner might install, solar panels and a battery, are the exact technologies utilities are racing to build, which means the tools to hedge a building's energy cost are more available and better proven than ever.
The capital markets have drawn the same conclusion. Financing is flowing toward commercial rooftops as a distinct asset class, with developers raising hundreds of millions of dollars specifically to build solar and storage on commercial and industrial buildings. For an owner, that means the money to put a system on a roof increasingly does not have to be the owner's own. It can come from a developer or financier who sees the roof as a productive asset. The lesson of the 91 percent is that distributed energy has crossed from emerging option to established default. The owner who treats onsite solar and storage as a serious part of the building's financial strategy is aligning with where the entire power system is already heading.
Sources
https://seia.org/news/solar-and-storage-provide-over-90-of-new-power-in-q1/
https://seia.org/blog/6-records-solar-and-storage-have-crushed-in-the-first-half-of-2026/
https://www.woodmac.com/press-releases/solar-storage-91-percent-us-new-power-capacity-q1-2026/
Frequently Asked Questions
How much of new US power capacity is solar and storage?
In the first quarter of 2026, solar and storage accounted for 91 percent of all new US electricity-generating capacity, the highest quarterly share the two have ever recorded, per SEIA and Wood Mackenzie.
Did solar really pass coal?
Yes. In May 2026, monthly US electricity generation from solar exceeded generation from coal for the first time in the nation's history. Solar now supplies about 13 percent of US electricity.
Why are solar and storage winning?
They are among the cheapest and fastest resources to build. When demand is rising and power is scarce, they can be financed and installed far faster than gas or nuclear, which is why utilities and large buyers keep choosing them.
What does this mean for a building owner?
The equipment, financing, and installer base for commercial solar and storage are scaling fast, lowering cost and shortening timelines. Capital increasingly treats commercial rooftops as an asset class, so an owner may not need to supply the capital themselves.
