EIA Projects Record 86 GW of U.S. Capacity
- Analysis Energy Storage Solar + Storage Integration
Marin Holt
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- 7 minutes read
- EIA forecasts record 86 GW of new U.S. utility-scale capacity in 2026, nearly double 2025's 53 GW
- Solar leads with 43.4 GW planned—a 60% year-over-year increase—followed by battery storage at 24.3 GW
- Texas will host 40% of new solar and 53% of new battery storage capacity nationwide
- 48% of all U.S. grid-scale storage is now co-located with solar arrays at a single interconnection point
- Tehuacana Creek 1 Solar & BESS in Texas is the largest planned project at 837 MW solar plus 418 MW storage
The U.S. Energy Information Administration released its preliminary electric generator inventory in February 2026, projecting that American grid operators will bring online a record 86 gigawatts of new utility-scale generating capacity this year—with solar and battery storage accounting for nearly four out of every five watts added. The report marks the clearest signal yet that solar-plus-storage integration has moved from a niche strategy to the dominant architecture for new grid capacity.
What the Numbers Show
Solar leads the build-out with 43.4 GW of planned utility-scale capacity, a 60 percent increase over 2025’s previous record of 27.2 GW. Battery storage follows at 24.3 GW, surpassing the 15 GW record set just one year prior. Together, the two technologies represent 79 percent of all planned additions. Texas is the epicenter: the state is slated to host 40 percent of new solar installations and 53 percent of new battery storage, driven in large part by ERCOT’s appetite for flexible capacity during extreme heat events. Texas, California, and Arizona collectively account for roughly 80 percent of all planned battery storage nationwide.
The largest single project expected to come online in 2026 is the Tehuacana Creek 1 Solar and BESS in Navarro County, Texas, developed by Solar Proponent LLC. The facility pairs 837 MW of photovoltaic capacity with a 418 MW battery energy storage system and connects to ERCOT, giving the grid both peak generation and dispatchable storage from a single interconnection point. That co-location strategy is now the norm: approximately 48 percent of all grid-scale storage in the United States is co-located with a solar array, up sharply from previous years.
Why Co-Location Dominates
Co-locating solar and storage at a single grid interconnection point addresses two persistent technical challenges: curtailment and peak mismatch. Solar arrays without storage are frequently curtailed during midday hours when generation exceeds transmission capacity. Adding a battery system on the same interconnection allows excess daytime generation to be absorbed and discharged into the evening peak, when wholesale prices are highest and grid stress is greatest. This architecture also reduces the number of grid interconnection queue applications required—an important advantage given that the national interconnection queue now exceeds 2,000 GW of pending projects.
From a power quality standpoint, large-scale solar-plus-storage systems introduce both benefits and challenges. The inverter-based resources that connect these facilities to the grid can respond to frequency deviations faster than conventional generators, providing synthetic inertia and fast frequency response. However, high inverter penetration also reduces the grid’s natural inertia, increasing susceptibility to rapid voltage swings and requiring more sophisticated power electronics to manage harmonic distortion and reactive power at the point of interconnection.
Scale and Trajectory
The United States now has more than 40 GW of installed grid-scale storage capacity. The EIA’s 2026 forecast would push that figure past 64 GW by year-end, assuming projects remain on schedule. California’s residential market reinforces the trend at a smaller scale: the state’s residential battery attachment rate has reached 69 percent as net metering policy shifts incentivize paired installations. Nationally, analysts project that one in eight American homes will have solar-plus-storage by 2030. The 86 GW projection for 2026 would represent the largest single-year capacity addition in more than two decades, nearly doubling the 53 GW installed in 2025—itself a record at the time.
Critical Analysis
Deploying 67.7 GW of inverter-based resources (43.4 GW solar PV plus 24.3 GW BESS) in 2026 raises the U.S. Adding 86 GW in one year with 79% inverter-based reduces effective grid inertia (H constant declining from 4-6 to 2-3 seconds in high-IBR regions) during afternoon-to-evening ramp events when BESS may be depleted from midday solar absorption.
Critical Perspective
The EIA’s preliminary inventory projects 86 GW of new utility-scale capacity for 2026 — a 60% increase over the previous solar record of 27.2 GW set in 2025 alone. EIA preliminary annual capacity projections have exceeded actual installations by 12–18% in each of the past four years, driven primarily by interconnection queue congestion and equipment delivery slippage; applying that discount reduces the likely realised 2026 total to 72–76 GW. The 2022–2023 utility solar buildout saw similar preliminary-to-final gaps, with BESS projects particularly affected by grid studies that added an average of 14 months to interconnection timelines. The report does not specify what share of the 43.4 GW in planned solar additions have executed interconnection agreements — the single variable that separates a build forecast from a pipeline wish list.
