How Much Hybrid Is Waiting to Connect?

How much Hybrid capacity is waiting to connect to the U.S. grid? The sealed answer, from the grid-queue snapshot on June 11, 2026: 483 projects totaling 54.2 GW, spread across the interconnection queues of 5 covered ISOs.

That number comes with an immediate caveat that is not optional reading. A queue position is a request to connect, not a built, approved, or financed project. For Hybrid in particular, the withdrawal rate is severe: 234 of the 483 recorded projects — 48.4% — have already been withdrawn according to ISOs that publish withdrawal status. This means nearly half of all Hybrid applications in this snapshot are already dead. The 249 still-in-queue projects (51.6%) are what remains of a category that has seen substantial attrition.

This report covers generation and storage projects sitting in the interconnection queues of the U.S. grid operators (ISOs and RTOs) that publish a machine-readable queue, as captured by US Tech Automations' sealed daily grid snapshots. This is a census of the published queues, not of every project on every grid in the country.

What "Hybrid" Means in This Data

The "Hybrid" category in this research is not a physical technology designation — it is a keyword-based grouping applied to ISO vendor labels. Vendor fuel and technology labels differ by ISO and are grouped into Solar, Battery Storage, Wind, Natural Gas, Hybrid and Other by keyword.

In practice, Hybrid entries in interconnection queue feeds most commonly represent co-located generation-plus-storage facilities: a solar farm paired with a battery system, a wind project co-located with storage, or a multi-fuel configuration that does not fit cleanly into a single-fuel bucket. Some ISOs use explicit "Hybrid" or "Multi" technology labels; others carry the term embedded in project names or technology description fields.

What this means for reading the data: a Hybrid project by this definition is likely combining two revenue streams — generation and storage dispatch — under one interconnection request. That makes Hybrid projects structurally different from pure-play Solar or Battery Storage entries. The single interconnection point covers multiple generation assets, which can affect both the economics and the study complexity.

Hybrid Nationals: Queue at a Glance

The median project size of 170 MW is above the national all-tech median of 150 MW. That is consistent with what you would expect from co-located facilities: combining generation and storage typically produces a larger registered capacity than either resource alone. The largest single Hybrid project in the snapshot carries 800 MW — substantial by any measure.

483 Hybrid projects sit in the national queue.

234 Hybrid projects (48.4%) are already withdrawn.

249 Hybrid projects (51.6%) remain still-in-queue.

MISO holds 388 of 483 Hybrid projects.

Nearly half of all Hybrid projects in this snapshot have been withdrawn. This is not a cautionary signal unique to Hybrid — the overall national withdrawal rate across all technologies is 36.5% where reported — but Hybrid's 48.4% rate is notably higher than Battery Storage (32.6%) and Natural Gas (24.1%).

How Hybrid Fits the National Technology Mix

Understanding Hybrid's place requires comparing it across the other fuel buckets in the national queue. Below is the full cross-technology table from the June 11, 2026 snapshot.

Hybrid is the smallest of the six named categories by both project count and capacity. By capacity, Hybrid's 54.2 GW is modest relative to Solar's 515.1 GW or Battery Storage's 442.0 GW. That context matters: Hybrid projects may represent innovative development configurations, but they are a small slice of the total queue.

Hybrid's withdrawal rate of 48.4% is the second-highest in this table, behind Solar's 45.1%. Both are substantially above Natural Gas at 24.1% and Battery Storage at 32.6%. High withdrawal rates for renewable-adjacent technologies are partly structural: interconnection study timelines are long, costs can exceed initial estimates, and developers sometimes abandon projects when study results come back unfavorable. A higher withdrawal rate for Hybrid relative to Battery Storage may also reflect the added complexity of coordinating two technologies through a single interconnection study.

The "Other" category's 5.2% withdrawal rate is anomalously low. This likely reflects ISO-NE's feed structure, where many "Other" projects carry unknown status rather than explicit withdrawal records — not that Other-type projects have a lower propensity to withdraw.

Hybrid's 48.4% withdrawal rate exceeds the national all-technology average of 36.5%. With MISO holding 388 of 483 Hybrid projects — and MISO itself showing a 56.2% withdrawal rate — the category's attrition is largely a MISO story.

Where Hybrid Concentrates: ISO-Level Deep Dive

The ISO-level distribution of Hybrid projects is strongly skewed toward MISO. Of the 483 Hybrid projects in this snapshot, MISO holds 388. That concentration means most of the Hybrid queue story is a MISO story.

MISO covers a large central swath of the U.S. — from the Gulf Coast to the Canadian border — and has processed a substantial volume of solar-plus-storage applications in recent years, many of which appear in interconnection feeds with hybrid-type labels. MISO's overall queue in this snapshot is 3,786 projects and 299.6 GW with a withdrawal rate of 56.2% — substantially above the national average — which explains in part why Hybrid's overall withdrawal rate is elevated.

The ERCOT, ISO-NE, and SPP withdrawal rates of 0.0% are feed artifacts — those ISOs do not include withdrawn projects in their published queues. This means the national comparison is not apples-to-apples: ISOs that publish withdrawn records will show higher withdrawal rates than ISOs that drop those records entirely.

For a deeper view of MISO's full queue — where the bulk of Hybrid projects sit — see the MISO interconnection queue report. For national context, the US interconnection queue index for June 2026 covers all 5 ISOs.

Methodology

Source: Public ISO/RTO interconnection-queue listings, via our grid-queue clock (sealed daily, content-hashed).

Honesty statement: All figures are computed directly from sealed daily grid-queue snapshots; nothing is estimated, modeled, or extrapolated. Fuel and status labels are grouped from each ISO's own categories, and the grouping rules appear in the display set.

Scope: Generation and storage projects classified as Hybrid across the queues of ISOs that publish machine-readable data. This snapshot covers 5 ISOs and 28 states. It is a census of the published queues, not of every project on every grid in the country.

Fuel bucketing: Vendor fuel and technology labels differ by ISO and are grouped into Solar, Battery Storage, Wind, Natural Gas, Hybrid and Other by keyword. "Hybrid" in this data is our keyword bucketing of differing vendor labels, not a standardized industry classification.

Status bucketing: Each ISO publishes its own status taxonomy; statuses are grouped into withdrawn, operational (explicitly in-service or commercial operation), still-in-queue, and unknown for feeds that publish no status. Some ISOs drop withdrawn projects from their feed entirely. Withdrawal rates computed here apply only to ISOs whose feeds include withdrawn records.

Grid disclaimer (repeated): A queue position is a request to connect, not a built, approved, or financed project. The 249 still-in-queue Hybrid projects have applied for interconnection; they have not been approved or permitted for construction.

How this data is produced:

1. Collect. The grid-queue clock fetches each covered ISO's published interconnection queue on a daily schedule.

2. Normalize. Project records are parsed, fuel labels are keyword-bucketed into the six categories, and status codes are bucketed into the four groups.

3. Seal. Each daily snapshot is content-hashed and stored in an append-only ledger, preserving the exact data as published.

4. Aggregate. Technology-level summaries are computed across all covered ISOs from the sealed snapshot for this report.

This report is cross-sectional: it reflects one snapshot day, June 11, 2026. No trend claims are made.

Frequently Asked Questions

Q: What types of projects does "Hybrid" actually include in this dataset?

A: "Hybrid" is a keyword-based bucket applied to ISO vendor labels. In practice it captures co-located generation-plus-storage facilities (solar-plus-battery, wind-plus-storage), multi-fuel configurations, and any project record whose ISO-assigned technology label contains hybrid-type keywords. It is our grouping, not a standardized industry term.

Q: Why is Hybrid's withdrawal rate (48.4%) so much higher than Natural Gas (24.1%)?

A: Several structural factors likely contribute. Hybrid projects involve coordinating two technologies through a single interconnection study, which can raise complexity and cost. The bulk of Hybrid projects sit in MISO, which has one of the highest withdrawal rates of any covered ISO (56.2%). No cross-sectional snapshot can isolate the cause — this is an observation, not an explanation.

Q: The "Other" category has only a 5.2% withdrawal rate. Why is it so low?

A: The "Other" category is heavily represented in ISO-NE's feed, which does not publish project-level status codes for all records. Those projects are classified as "unknown," not "withdrawn" — so the apparent withdrawal rate is artificially low. It reflects the feed structure of the ISOs where "Other" concentrates, not a genuine difference in developer behavior.

Q: Does 54.2 GW of Hybrid capacity mean that much power will come online?

A: No. A queue position is a request to connect, not a build commitment. With 48.4% of Hybrid projects already withdrawn, the still-in-queue total of 54.2 GW already reflects a significantly smaller set than the original application volume. Of the remaining 249 in-queue projects, some will also withdraw before construction.

Q: Who benefits most from tracking Hybrid project applications?

A: Equipment suppliers who serve co-located projects (inverters, storage systems, balance-of-plant components), EPC contractors who build hybrid facilities, utilities planning for grid interconnection studies, and energy researchers tracking technology adoption patterns in developer applications.

Put Hybrid Queue Data to Work

Three types of teams find actionable signal in Hybrid interconnection queue data:

EPC contractors and equipment suppliers who build or supply co-located solar-plus-storage facilities can use Hybrid queue volumes to understand where development applications are concentrated by ISO. MISO's dominance at 388 of 483 Hybrid projects points to where the bulk of study activity is occurring.

Project developers tracking their own applications alongside the broader competitive queue can use Hybrid status data (249 still-in-queue) to understand their relative position and the study backlog within their ISO.

Grid researchers and policy analysts studying the adoption of co-located resource configurations can use this census to quantify the scale of Hybrid applications relative to pure-play Solar (4,145 projects) or Battery Storage (2,824 projects) at a point in time.

US Tech Automations builds workflow automations that ingest interconnection queue feed data, track project status changes, and route signals to the teams that act on them. This is data-ingestion and alerting automation applied to publicly available ISO feeds. Explore what automated queue monitoring looks like at the workflow platform.

For related fuel-type reports, see the solar interconnection queue report and the battery storage interconnection queue report.

The wind interconnection queue report covers another single-technology cut, and for the full national picture, visit the US interconnection queue index for June 2026.

Source: US Tech Automations Research — computed from the sealed daily interconnection-queue snapshot, June 11, 2026.