Grid-Forming Inverter for Renewable Integration Patent Landscape
Grid-Forming Inverter for Renewable Integration Patent Landscape in 2026
The grid-forming inverter space is in active growth, with 237 patent families on record and filings rising sharply since 2020. Vestas Wind Systems leads a moderately fragmented field where the top five filers account for roughly a quarter of the hundred largest filers’ combined output, leaving meaningful room for challengers.
Vestas leads a moderately open field with no single dominant bloc
Vestas Wind Systems holds the top position with 20 patent families, followed closely by Vestesen Hybrid Energy with 17. The remaining ranked applicants — including Elexsys IP, ABB (Switzerland), and Bloom Energy, each at 9 — form a tight second tier, signalling that leadership is contested rather than entrenched.
The top five filers together account for 25% of the hundred largest filers’ combined total, a moderate concentration level. No single player commands a blocking position, and the gap between the leader and the second tier is narrow enough that a focused entrant could close it within a standard product cycle.
| # | Applicant | Patent families | Share |
|---|---|---|---|
| 1 | Vestas Wind Systems A/S | 20 | |
| 2 | Vestesen Hybrid Energy ApS | 17 | |
| 3 | Elexsys IP Pty Ltd | 9 | |
| 4 | ABB (Switzerland) AG | 9 | |
| 5 | Bloom Energy Corporation | 9 | |
| 6 | Adaptr Inc | 8 | |
| 7 | NewSouth Innovations Pty Ltd | 7 | |
| 8 | GE Vernova Infrastructure Technology LLC | 6 | |
| 9 | TMEIC Corporation | 6 | |
| 10 | Powerhouse (by Synertec) Pty Ltd | 6 |
| # | Applicant | Patent families | Share |
|---|---|---|---|
| 11 | Aggreko Deutschland GmbH | 6 | |
| 12 | Mitsubishi Electric Corporation | 5 | |
| 13 | Danvest Energy A/S | 5 | |
| 14 | Toshiba Corporation | 5 | |
| 15 | Ford Global Technologies LLC | 5 | |
| 16 | General Electric Technology GmbH | 4 | |
| 17 | Indian Institute of Technology | 4 | |
| 18 | Nikitin Alexei V | 4 | |
| 19 | China Southern Power Grid Company | 4 | |
| 20 | China Southern Power Grid CSG Electric Power Research Institute | 4 |
Vestas and Vestesen’s near-parity at the top reflects distinct strategic emphases: Vestas draws on a wind-turbine heritage while Vestesen focuses on hybrid energy architectures. That divergence at the frontier suggests the technology is not yet consolidating around a single dominant design.
Patent publication typically lags filing by 18–24 months, so activity in 2025–2026 is under-represented in these counts; the true recent pace is higher than figures suggest. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
Filings have accelerated sharply since 2020, anchored in grid-systems IP
The annual filing chart and technology-composition breakdown together reveal a field that has shifted from early-stage curiosity to mainstream R&D priority, with a clearly dominant technical branch and several smaller adjacent ones.
Annual filing trend
Annual filings were in single digits through 2018, then stepped up through 2020–2021 before accelerating to 25 in 2022, 42 in 2023, and 67 in 2024 — a 227% expansion over the recent window. The 2025 and 2026 tallies are incomplete owing to publication lag and should not be read as a slowdown.
↗ Hover for values · click a bar to ask EurekaTechnology composition
H02J (Power supply and grid systems) dominates with 226 patent records, confirming that grid-interconnection and stability control are the core technical battleground. H02M (Power conversion) is a distant second at 53, followed by G05F (variable control), B60L (EV propulsion), and G05B (control systems) — each representing adjacent application areas with materially lower coverage.
↗ 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.
Method and system for dynamic stability control of…
A dynamic stability control method for power systems with renewable energy, in which a non-linear system of a grid-forming inverter corresponding to a renewable energy power system is created. An external subsystem corresponding to the grid-forming inverter is constructed based on a Lie derivative. According to the external subsystem, a linear sliding… (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 | Design, deployment, and operation of modular micro… | 31 |
| 4 | Controllers for Regulated Power Inverters, AC/DC, … | 21 |
| 5 | Grid forming wind turbine with an electric storage | 19 |
| 6 | System for handling short circuits on an electrica… | 16 |
| 7 | Cyber-resilient sliding mode consensus-based distr… | 15 |
| 8 | Delivery of stored electrical energy from generati… | 14 |
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 structure means for R&D investment decisions
The combination of a growth lifecycle, moderate concentration, and a dominant technical branch defines a field where first-mover advantages are still being established and targeted entry remains viable.
Growth stage: filings still rising from a low base
The lifecycle evidence places this field firmly in Growth, with annual filings rising continuously and the 2025–2026 data understated by publication lag. The 227% expansion over the recent window reflects genuine acceleration, not a statistical artefact. Teams entering now can still shape standard-setting positions rather than licensing around an entrenched portfolio.
Growth stageModerate concentration; second tier within reach
The top five filers hold 25% of the hundred largest filers’ combined output, and the gap between the leader (20 patent families) and the third-ranked applicants (9 each) is moderate. This is a field where a focused three-year filing programme could move a challenger into the top tier. No applicant yet holds a portfolio large enough to enforce broad exclusivity.
Fragmented topNo co-applicant activity detected in this corpus
Evidence pending — no co-applicant or joint-filing relationships were identified in the current dataset. The absence of recorded collaboration suggests players are competing independently rather than via consortia, which is consistent with the competitive dynamics of a fast-growing, commercially sensitive technology. Academic institutions (Indian Institute of Technology, Georgia Tech, University of Missouri) appear as independent filers rather than industry partners.
Independent filersUS dominates; PCT and EPO indicate international ambition
The United States leads with 91 patent records, well ahead of WIPO PCT filings at 46 and EPO at 34. India’s 26 records reflect both domestic industrial policy and the concentration of academic filers from Indian technical institutes. China’s tally of only 5 records is notably low relative to its global role in inverter manufacturing, suggesting either a filing strategy focused on domestic offices (not captured here) or a genuine gap in international prosecution for Chinese entities in this space.
US-led, global reachGo 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.
Co-filing pairs, ranked by the number of jointly-filed patent families.
Vestas and Vestesen lead from wind and hybrid energy angles respectively
The two leaders entered the corpus as new entrants in the recent period, reflecting the field’s overall youth. Their technology emphases diverge despite both concentrating in the H02J grid-systems branch.
Vestas Wind Systems
Vestas holds 20 patent families, the largest portfolio in scope. Its technical focus centres on H02J grid-systems (20 filings), supplemented by F03D wind-turbine control (5 filings) and C25B electrolytic production — the latter pointing toward hydrogen integration. Momentum is classified as a new entrant in the recent window, consistent with a deliberate push into grid-forming capability from an established turbine platform.
patent families: 20Vestesen Hybrid Energy
Vestesen holds 17 patent families and concentrates entirely on H02J grid-systems (17 filings), with secondary filings in H01M batteries and H02J charging — indicating a hybrid storage-plus-inverter architecture strategy. Like Vestas, it is classified as a new entrant in the recent window, suggesting its portfolio was assembled rapidly. The narrow gap to the leader makes it the most credible near-term challenger for the top position.
patent families: 17| Applicant | Recent (3 yrs) | Trend |
|---|---|---|
| Vestas Wind Systems A/S | 13 | ▲ new entrant |
| Vestesen Hybrid Energy ApS | 13 | ▲ new entrant |
| Elexsys IP Pty Ltd | 1 | ▲ new entrant |
| Bloom Energy Corporation | 9 | ▲ new entrant |
| ABB (Switzerland) AG | 7 | ▲ new entrant |
| Adaptr Inc | 1 | ▲ new entrant |
| GE Vernova Infrastructure Technology LLC | 7 | ▲ new entrant |
Under-served branches adjacent to the dominant grid-systems core
Several IPC branches appear in the corpus at low share, indicating they intersect with grid-forming inverter technology but have not yet attracted concentrated filing activity. These are observations of relative sparsity; whether they represent actionable opportunities depends on technical fit and competitive context.
G05F · Electric and magnetic variable control
With only 20 patent records and a 5% share, the variable-control branch is the largest under-served area adjacent to the dominant H02J core. Grid-forming inverters require precise voltage and frequency regulation, making G05F a technically plausible extension — particularly for adaptive droop control and virtual synchronous machine implementations. Elexsys IP is the most active filer here (7 sub-class records), but the branch remains open for entrants with control-systems expertise.
Search this in Eureka →B60L · Electric vehicle propulsion
Fourteen patent records place EV propulsion at 3% share — sparse given the growing interest in vehicle-to-grid (V2G) architectures that rely on bidirectional grid-forming inverters. Adaptr Inc is the most active filer in this branch, with 8 B60L sub-class records, but the broader V2G-plus-grid-forming intersection appears under-explored. Teams with combined EV-power-electronics and grid-interconnection capabilities may find limited prior art to navigate.
Search this in Eureka →How leaders differ by technology route
Strength of each leader across the main technology routes.
| Player | H02J 3 · Power supply & grid systems | H02J 13 · Power supply & grid systems | H02M 1 · Power conversion (AC/DC etc.) | H02M 7 · Power conversion (AC/DC etc.) | H02J 7 · Power supply & grid systems |
|---|---|---|---|---|---|
| Vestas Wind Systems A/S | Strong · 20 | Absent | Absent | Absent | Emerging · 2 |
| Vestesen Hybrid Energy ApS | Strong · 17 | Absent | Absent | Absent | Emerging · 3 |
| ABB (Switzerland) AG | Strong · 8 | Absent | Strong · 6 | Strong · 5 | Absent |
| Powerhouse (by Synertec) Pty Ltd | Strong · 6 | Strong · 4 | Absent | Absent | Strong · 5 |
| Bloom Energy Corporation | Strong · 9 | Strong · 5 | Absent | Absent | Absent |
| NewSouth Innovations Pty Ltd | Strong · 7 | Strong · 7 | Absent | Absent | Absent |
| Elexsys IP Pty Ltd | Strong · 9 | Moderate · 2 | Moderate · 2 | Absent | Absent |
Frequently asked questions
The current dataset covers 237 patent families globally. This figure reflects patents filed and published to date; activity in the most recent 18–24 months is under-represented due to standard publication lag, so the true portfolio is somewhat larger.
Vestas Wind Systems holds the largest portfolio with 20 patent families, followed by Vestesen Hybrid Energy with 17. Both are classified as new entrants in the recent filing window, reflecting the field’s recent acceleration.
The United States leads with 91 patent records, followed by WIPO PCT filings at 46 and the European Patent Office at 34. India is notable at 26 records, partly reflecting filings from Indian academic institutions.
H02J (Power supply and grid systems) dominates with 226 patent records. H02M (Power conversion) is a distant second at 53 records. The concentration in H02J confirms that grid-interconnection, stability, and reactive-power control are the primary technical focus areas.
Yes. The lifecycle stage is classified as Growth, with annual filings rising from single digits before 2019 to 67 in 2024 — a 227% expansion over the recent multi-year window. The 2025 and 2026 data are incomplete due to publication lag and do not represent a slowdown.
Two branches stand out for their relative sparsity: G05F (Electric and magnetic variable control) at 20 patent records and B60L (Electric vehicle propulsion) at 14 records. Both have plausible technical connections to grid-forming inverter applications — droop and virtual synchronous control in the case of G05F, and vehicle-to-grid bidirectional architectures in the case of B60L — but neither has attracted concentrated filing activity yet.
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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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