Grid-Forming Inverter Patent Landscape 2026
Grid-Forming Inverter Patent Landscape in 2026
Grid-forming inverter IP is in active growth, with filings rising sharply since 2019 and the United States leading as the top filing jurisdiction. General Electric Renovables España leads a moderately concentrated field, though the top five filers account for under a quarter of the leading hundred applicants’ combined output, leaving meaningful room for challengers.
GE Renovables leads a moderately open competitive field
General Electric Renovables España holds the top position with 60 patent families, a clear margin ahead of the second-ranked TMEIC Corp at 26 families. The ranking reveals a tiered structure in which a handful of industrial players and wind-energy specialists dominate, while a diverse tail of utilities, research institutes, and start-ups occupy the lower ranks.
The top five filers — General Electric Renovables España, TMEIC Corp, ABB (Schweiz), Vestas Wind Systems, and Siemens Gamesa Renewable Energy — together account for 24% of the hundred largest filers’ combined output. That share indicates moderate concentration: the leader holds a genuine advantage, but no single player has locked up the space.
| # | Applicant | Patent families | Share |
|---|---|---|---|
| 1 | General Electric Renovables España SL | 60 | |
| 2 | TMEIC Corp | 26 | |
| 3 | ABB (Schweiz) AG | 23 | |
| 4 | Vestas Wind Systems A/S | 21 | |
| 5 | Siemens Gamesa Renewable Energy A/S | 20 | |
| 6 | GE Infrastructure Technology LLC | 19 | |
| 7 | Vestesen Hybrid Energy ApS | 17 | |
| 8 | Toshiba Mitsubishi-Electric Industrial Systems Corporation | 16 | |
| 9 | Korea Institute of Energy Research | 16 | |
| 10 | Bloom Energy Corporation | 16 |
| # | Applicant | Patent families | Share |
|---|---|---|---|
| 11 | GE Vernova Infrastructure Technology LLC | 14 | |
| 12 | Toshiba Corporation | 12 | |
| 13 | Battelle Memorial Institute | 11 | |
| 14 | Scottish Hydro Electric Transmission PLC | 10 | |
| 15 | North China Electric Power University | 10 | |
| 16 | General Electric Company | 9 | |
| 17 | Zhejiang University | 9 | |
| 18 | Elexsys IP Pty Ltd | 9 | |
| 19 | Siemens AG | 8 | |
| 20 | Tianjin University | 8 |
The leaders’ positions reflect deep industrial experience in grid-connected power electronics and wind-energy integration, suggesting that meaningful competitive entry requires either differentiated control-algorithm IP or a partnership with grid operators — consistent with the co-filing pattern observed in the collaboration data.
Filings from 2025 and 2026 are understated due to typical patent-publication lag of 12–18 months; counts for those years will rise materially as applications publish. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
Filing volume has surged since 2019 and the technology core is power-supply grid systems
Two charts frame the competitive dynamics: the annual trend shows when commercial urgency accelerated, and the IPC composition reveals which engineering sub-fields attract the most claims and which remain sparse.
Annual filing trend
Annual filings were minimal through 2018 then accelerated sharply from 2019 onward, reaching a recorded peak of 165 families in 2024. The apparent drop in 2025 and the low 2026 figure reflect publication lag, not a real slowdown — these years will backfill as applications are published. The multi-year window shows a 169% growth rate, firmly placing the field in its growth phase.
↗ Hover for values · click a bar to ask EurekaTechnology composition
H02J (Power supply and grid systems) dominates with 631 records, confirming grid-interface and stability control as the core engineering challenge. H02M (Power conversion) is the second-largest branch with 236 records, reflecting the inverter hardware layer. Downstream application classes — F03D (wind turbines), H02H (protective circuits), G05B (control systems), H02P (motor/generator control), and G06F (digital data processing) — each carry fewer than 45 records, signaling adjacent but comparatively under-served sub-fields.
↗ Hover for values · click a bar to ask EurekaHighly cited patent families surfaced by the query
Citation-heavy patent families returned by the query. Use this section as citation context, not as a curated list of the most topic-specific patents.
System and method for protecting grid-forming inve…
A method for protecting a grid-forming inverter-based resource connected to a power grid from power deviations. The method includes receiving a first feedback signal for a first parameter. The first parameter being one of a power of the grid-forming inverter-based resource or an electrical frequency of the power grid. The method also includes determining a… (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | System for handling short circuits on an electrica… | 43 |
| 2 | Emergency Load Management Using A DC Microgrid Dur… | 42 |
| 3 | Distributed energy resource management system | 36 |
| 4 | Design, deployment, and operation of modular micro… | 31 |
| 5 | Method of starting a wind park | 29 |
| 6 | Method of starting a wind park | 28 |
| 7 | 具有动态限流功能的构网型逆变器控制方法 | 24 |
| 8 | Using distributed power electronics-based devices … | 21 |
Ranked by total forward citations. Citation counts favour older and broadly cited patent families, and broad or adjacent patents may appear when they match the search scope. Treat this section as citation context, not as a curated list of the most topic-specific patents. Some patent titles may be shown in their original, non-English language where an accurate translation could not be guaranteed.
What the IP structure means for R&D investment decisions
The combination of rapid growth, moderate concentration, sparse adjacent branches, and a tightly coupled main technology class creates both competitive risks and exploitable gaps for new entrants and incumbents alike.
Active growth phase — annual filings still rising
The lifecycle evidence classifies this field as Growth, with a 169% increase over the recent multi-year window and annual filings still rising as of the 2024 recorded peak. Publication lag means 2025–2026 figures will increase further. Entrants who establish foundational claims now can still shape the IP landscape before consolidation begins.
Lifecycle: GrowthModerate concentration with a visible tier gap
The top five filers hold 24% of the hundred largest filers’ combined families, and the leader’s 60-family position is more than double the second-ranked player’s 26. Below the top two, the gap narrows — ABB at 23, Vestas at 21, and Siemens Gamesa at 20 form a tight mid-tier. This structure means the leader has a defensible but not impenetrable advantage, and the mid-tier remains genuinely competitive.
Concentration: ModerateLimited co-filing observed; TMEIC entities the most active co-filers
The only co-filing relationship identified in the evidence is between TMEIC Corp and the related entity TMEIC (the Japanese parent), which share 3 jointly filed patent families. This suggests that collaborative patenting across independent organizations is rare in this space so far, and that most IP is being developed and filed unilaterally. Broader consortium-level co-development agreements may exist outside the patent record.
Collaboration: Early-stageUS and China lead filings; PCT and EPO routes signal global intent
The United States is the top filing jurisdiction with 172 records, followed closely by China with 152. WIPO (PCT) filings at 92 and the European Patent Office at 86 indicate that leading applicants are pursuing broad international protection rather than limiting themselves to single markets. India at 49 and South Korea at 31 round out the top five, reflecting the global scale-up of grid-modernization programs.
Geography: GlobalGo beyond the landscape: Eureka’s TRIZ Solution agent breaks down an R&D problem and returns patented concept solutions, each with a technical approach and cited patent & literature evidence.
| Applicant | Collaborator | Co-filings |
|---|---|---|
| TMEIC Corp | TMEIC Corporation (Japan) | 3 |
Co-filing pairs, ranked by the number of jointly-filed patent families.
General Electric Renovables España leads; TMEIC and DG Matrix are accelerating challengers
The leader position is held by an industrial wind-energy specialist with a core focus on grid-interface control, while the challenger tier includes a Japanese power-electronics incumbent and a new-entrant start-up with a hardware-centric approach.
General Electric Renovables España
Ranked first with 60 patent families, General Electric Renovables España concentrates its portfolio in H02J 3 (grid power supply systems, 50 families), with secondary positions in H02P 9 (generator control) and F03D 7 (wind turbine control). Filing momentum is strong at 3.5× versus the prior three-year period, indicating continued aggressive portfolio expansion rather than a maintenance posture.
families: 60TMEIC Corp
TMEIC Corp enters the evidence as a new entrant in the recent window with 12 recent families and a trend classified as new entrant, holding 26 total patent families overall. Its technology emphasis sits squarely in H02M 7 (power conversion hardware, 17 families) and H02J 3 (grid systems, 9 families), complemented by DG Matrix — also a new entrant with 11 recent families — whose focus on H02M 1 and H02M 7 hardware suggests a converging hardware-layer competition below the grid-interface software tier.
families: 26| Applicant | Recent (3 yrs) | Trend |
|---|---|---|
| General Electric Renovables España SL | 35 | ▲ 3.5× vs prior 3-yr |
| General Electric Company | 25 | ▲ +150% |
| ABB (Schweiz) AG | 7 | ▼ -50% |
| Toshiba Mitsubishi-Electric Industrial Systems Corporation | 5 | ▼ -71% |
| Vestas Wind Systems A/S | 14 | ▲ new entrant |
| Siemens Gamesa Renewable Energy A/S | 9 | ▼ -10% |
| TMEIC Corp | 12 | ▲ new entrant |
Protective circuits and control systems are under-served relative to the grid-interface core
Several IPC branches appear in the corpus at low share relative to the dominant H02J class. These represent areas where the current patent footprint is sparse; technical plausibility and entry paths vary by branch.
H02H · Protective circuit arrangements
With 38 records and a 3% share among the hundred largest filers’ output, fault-ride-through and overcurrent-protection circuitry specific to grid-forming operation is notably sparse. Grid-forming inverters must handle fault conditions differently from conventional grid-following designs — particularly for short-circuit current limitation — yet this sub-field has attracted limited dedicated IP. A targeted filing program combining inverter control algorithms with hardware protection topologies could establish a defensible position before larger players move in.
Search this in Eureka →G05B · Control and regulating systems
At 27 records and a 2% share, advanced control-system architectures for grid-forming inverters — including model-predictive control, adaptive droop, and real-time regulation — remain under-represented. Given the increasing interest in AI-assisted grid management (G06N appears with only 6 records), combining classical control-system patents (G05B) with machine-learning-based adaptive schemes represents a plausible entry path for software-heavy or research-oriented applicants, with realistic technology readiness given existing academic work from institutions such as North China Electric Power University and Zhejiang University already active in the corpus.
Search this in Eureka →How leaders differ by technology route across grid, conversion, and wind sub-classes
Strength of each leader across the main technology routes.
| Player | H02J 3 · Power supply & grid systems | H02M 7 · Power conversion (AC/DC etc.) | H02M 1 · Power conversion (AC/DC etc.) | H02J 13 · Power supply & grid systems | H02J 7 · Power supply & grid systems |
|---|---|---|---|---|---|
| General Electric Renovables España SL | Strong · 50 | Absent | Absent | Absent | Absent |
| General Electric Company | Strong · 34 | Emerging · 6 | Absent | Absent | Absent |
| Korea Institute of Energy Research | Strong · 16 | Strong · 14 | Strong · 9 | Absent | Absent |
| ABB (Schweiz) AG | Strong · 21 | Moderate · 5 | Moderate · 8 | Absent | Absent |
| Toshiba Mitsubishi-Electric Industrial Systems Corporation | Absent | Strong · 22 | Moderate · 6 | Absent | Absent |
| Bloom Energy Corporation | Strong · 13 | Absent | Moderate · 4 | Moderate · 5 | Absent |
Frequently asked questions
The corpus covers 700 patent families in scope globally. Filing activity was negligible before 2019 and has grown sharply since, with the most recent years understated due to publication lag.
General Electric Renovables España leads with 60 patent families, followed by TMEIC Corp at 26 and ABB (Schweiz) AG at 23. The top five filers together represent 24% of the hundred largest filers’ combined families, indicating moderate but not dominant concentration.
The United States leads with 172 records, followed by China at 152, WIPO (PCT) at 92, and the European Patent Office at 86. India and South Korea also feature prominently, reflecting broad global interest in grid modernization.
The evidence classifies the field as Growth. Annual filings are still rising, with a 169% increase over the multi-year window and a recorded peak of 165 families in 2024. The apparent decline in 2025–2026 reflects publication lag and is not a real slowdown.
Relative to the dominant H02J (Power supply and grid systems) class, protective circuit arrangements (H02H, 38 records) and control and regulating systems (G05B, 27 records) are sparse. H02P (motor and generator control) and G06F (digital data processing) each appear at 27 and 26 records respectively, also below the field’s core density.
The only co-filing relationship identified in the evidence is between TMEIC Corp and its related Japanese entity, sharing 3 jointly filed families. Cross-organization co-patenting is limited in this corpus, suggesting that most R&D collaboration — if it exists — has not yet been formalized into joint patent filings.
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Disclaimer. This page is generated from PatSnap Eureka data drawn from a limited snapshot of global patent and scientific-literature records, and is provided for general information and reference only.
Patent data carries inherent limitations: recent filings (typically the most recent 18–24 months) are under-counted due to standard publication lag; counts may be reported at either a patent-family or a patent-record basis and are not always directly comparable; classification, applicant-name, and citation data may contain errors, duplicates, or omissions; and the underlying search query defines and constrains the scope shown. As a result, the analysis may be incomplete or inaccurate and may not reflect the full technology landscape.
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