Solar Panels: AI Visibility Market Discovery Index

Benchmark Summary

Qcells leads the Solar Panels benchmark in October 2026 with a valid recommendation coverage of 69.5%, up from 59.7% in July 2026. Maxeon (SunPower) follows at 65.8% in October 2026, up from 59.2% in July 2026, a 3.7-point gap between the top two brands. REC Group sits third at 64.0% in October 2026, up from 57.6% in July 2026.

October 2026 was a mixed month across the panel. JinkoSolar recorded the largest month-over-month increase, rising from 23.5% in September 2026 to 30.7% in October 2026, up 7.2 points, a move beyond normal month-to-month variation. Panasonic recorded the largest month-over-month decline in raw terms, falling from 14.0% in September 2026 to 10.3% in October 2026, down 3.7 points, continuing a three-month decline that began in July 2026.

Across the full series, four brands moved beyond normal variation since July 2026: Qcells rose 9.8 percentage points, Maxeon (SunPower) rose 6.6 points, REC Group rose 6.4 points, and Trina Solar rose 4.5 points. Panasonic declined 5.0 points over the same period, also beyond normal variation. Qcells and Maxeon (SunPower) have each risen in every month since July 2026, while Panasonic has declined in each of those three months.

The benchmark began with 800 prompt-surface observations in each month and produced 514 qualified observations in October 2026 after qualification.

Current Benchmark at a Glance

Qcells led the category in July 2026 (59.7% versus Maxeon's 59.2%). Maxeon (SunPower) moved into a narrow lead in August 2026 at 60.6% (versus Qcells' 60.2%), before Qcells reclaimed the lead in September 2026 at 65.5% (versus Maxeon's 62.4%) and held it through October 2026. A 0.4-point margin decided the August leadership change.

Qualified surface breadth counts the canonical AI/search surface families with at least one qualified observation: ChatGPT, Copilot, Gemini, Perplexity, AI Overviews, and AI Mode. All six families were active in both months.

For the strategic interpretation of this benchmark, read CiteWorks Studio's analysis of How AI Search Is Recommending Solar Panels

Research Scope and Qualification

The public benchmark is narrower than the raw collection universe by design.

Brand-level percentages use the qualified observations as the public denominator, not the raw collection. See the AI Visibility Market Discovery Methodology.

Current Brand Standings

Questions This Section Answers

• Which solar panel brands lead on valid recommendation coverage, and how far apart are they?
• Where do presence rate and top-three rate tell a different story from overall coverage?

How to Read the Standings

Presence rate is the share of qualified observations where the brand appears in any form, whether recommended, mentioned, or discussed.

Valid recommendation coverage is the share of qualified observations where the brand appears in a valid recommendation context, the primary metric for this benchmark.

Top-three rate is the share of qualified observations where the brand appears within the first three recommended positions.

Rank-one rate is the share of qualified observations where the brand is the single first recommendation.

Net sentiment reflects the balance of positive versus negative mentions, scored from -1.0 to 1.0.

For formulas and denominator rules, see AI Visibility Market Discovery Metric Definitions.

Recommendation Coverage Movement

Questions This Section Answers

• Which solar panel brands moved beyond normal variation since the July 2026 baseline?
• What happened to JinkoSolar and Panasonic in October 2026?

Between September 2026 and October 2026, JinkoSolar rose 7.2 points and Canadian Solar rose 4.3 points, the two largest month-over-month moves in the series.

Largest Increase: JinkoSolar

JinkoSolar recorded the largest single-month coverage increase in October 2026, rising from 23.5% in September 2026 to 30.7% in October 2026, up 7.2 points, a move beyond normal variation. Across the full series the brand rose from 27.6% in July 2026. Its rank-one rate rose from 3.5% in July 2026 to 6.8% in October 2026.

Largest Decline: Panasonic

Panasonic recorded a significant coverage decline across the full series, falling from 15.3% in July 2026 to 10.3% in October 2026, down 5.0 points, a decline beyond normal variation across the series. The decline was gradual rather than abrupt: the brand measured 15.2% in August 2026, 14.0% in September 2026, and 10.3% in October 2026, a decline in each of the three months since July 2026. Its presence rate also fell 6.2 points across the series, from 21.0% in July 2026 to 14.8% in October 2026.

Category Leader: Qcells

Qcells leads the category in October 2026 with a valid recommendation coverage of 69.5%, up from 59.7% in July 2026, a rise beyond normal variation across the series. Qcells led the category in July 2026 and again from September 2026 onward, after Maxeon (SunPower) held a narrow lead in August 2026. Qcells leads Maxeon (SunPower) by 3.7 points and REC Group by 5.5 points. The brand's presence rate held steady, from 82.9% in July 2026 to 83.9% in October 2026. Its valid recommendation coverage has risen in each of the three months since July 2026.

Recommendation Placement Snapshot

Questions This Section Answers

• How can brands with similar top-three rates have very different rank-one rates?
• Which brands appear most often as the first recommendation versus lower in the list?

Coverage alone does not show how prominently a brand is recommended. Placement rates reveal how often a brand appears at the top of the recommendation list versus lower in the response.

REC Group and Maxeon (SunPower) show top-three rates within 1.7 points in October 2026 (53.9% versus 52.3%), but their rank-one rates differ sharply: REC Group leads at a 32.5% rank-one rate versus 21.0% for Maxeon (SunPower). Qcells holds the highest coverage of the three but the lowest rank-one rate. This shows how similar top-three coverage can still hide very different first-position rates.

Buyer-Intent Distribution

Questions This Section Answers

• What buyer-intent classes are currently measured in this solar panel benchmark?
• Which discovery intents are not yet represented in the qualified observations?

All qualified observations in both months fell into the brand recommendation class, representing discovery and consideration intent.

The current public series measures only the brand recommendation class of discovery. Pricing and value and multi-brand comparison have no qualified observations in this data.

Historical Measurement Record

Questions This Section Answers

• How has the solar panel coverage leader changed across the four measurements?
• Which month recorded the largest coverage movement, and for which brand?

This is an evergreen benchmark URL. New measurements are added to the same report.

Leadership changed hands once in four measurements, on a 0.4-point margin in August 2026.

Evidence and Source Layer

The benchmark is built from prompt-level observations that retain the query, AI/search surface, answer, brand outcome, recommendation placement, sentiment, and where exposed, citations or attributable evidence sources. Source presence is evidence about the information environment. It is not automatically proof that the source caused the recommendation.

Scope Boundaries

This public benchmark does not measure:

• Market share or sales attribution
• Every possible AI response a user might receive
• Organic-search ranking positions
• Social media mention volume
• Private or sponsored AI channels
• Causality from a metric movement alone

Top 10 Cited Domains

Questions This Section Answers

• Which domains are cited most often across AI platform responses for solar panels?
• Do any solar panel brands' own domains appear among the most-cited sources?

Across all AI platform responses in October 2026, 6,697 citations were observed across 1,437 unique domains.

Citations are broadly distributed: the top 10 domains account for 34.8% of all citations across 1,437 unique domains. No tracked solar panel brand's own domain appears in the top 10. Review and marketplace sources dominate the list, with energysage.com and solarreviews.com cited across all six platform families, while consumer trust and news sources such as forbes.com, ecowatch.com, and consumeraffairs.com also feature prominently.

About This Benchmark

The LLM Authority Index AI Visibility Market Discovery Index tracks how often and how prominently brands appear in AI-generated recommendations across six canonical AI/search surface families. It is a neutral, industry-level benchmark updated monthly.

• AI Visibility Market Discovery Methodology
• AI Visibility Market Discovery Metric Definitions
• AI Visibility Market Discovery Research Standards
• Modeled AI Visibility Authority Value

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