Grid-Forming Inverter for Renewable Hydrogen Patent Landscape
Grid-Forming Inverter for Renewable Hydrogen Patent Landscape in 2026
With 21 patent families on record and a corpus that emerged almost entirely after 2021, grid-forming inverter IP for renewable hydrogen is a nascent but rapidly expanding field dominated by four applicants — ABB (Schweiz) AG, Vestesen Hybrid Energy APS, Vestas Wind Systems, and Siemens Energy — who together hold every family among the top filers. The field is still expanding on a multi-year basis, though annual volume has eased from its 2022 peak and the most recent filing years carry additional undercount from publication lag.
Four applicants control the entire landscape — concentration is absolute
ABB (Schweiz) AG leads with 8 patent families, followed closely by Vestesen Hybrid Energy APS with 7, Vestas Wind Systems with 4, and Siemens Energy Global with 2. These four applicants account for the full top-100 ranked filers’ combined total, making this one of the most concentrated emerging-technology domains visible in the corpus.
The top-five filers’ share of the hundred largest filers stands at 100%, confirming that no meaningful secondary tier exists yet. The gap between the leader (ABB, 8 families) and the fourth-ranked player (Siemens Energy, 2 families) is already pronounced at this early stage.
| # | Applicant | Patent families | Share |
|---|---|---|---|
| 1 | ABB (Schweiz) AG | 8 | |
| 2 | Vestesen Hybrid Energy APS | 7 | |
| 3 | Vestas Wind Systems A/S | 4 | |
| 4 | SIEMENS ENERGY GLOBAL GMBH & CO KG | 2 |
ABB’s position reflects a dual emphasis on grid systems and power conversion, while Vestesen and Vestas bring complementary electrolyzer and wind-integration angles. Siemens Energy’s 2-family presence signals awareness but not yet a committed filing program.
Filings from 2024 onward are subject to standard publication lag and are likely undercounted; apparent softness in those years should not be read as a contraction of activity. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
Activity surged after 2021; grid-systems IP dominates the technology mix
The filing trend and the technology composition together reveal a field that ignited suddenly in 2022 and is still building its foundational IP stack, concentrated heavily in power-grid and power-conversion classes.
Annual filing trend
Zero filings were recorded in 2017–2020; activity began in 2021 with a single family, then jumped to six in both 2022 and 2023 before easing to five in 2024 and three in 2025. The 2024–2025 figures almost certainly understate true activity due to publication lag, so the multi-year growth trajectory — a 1,600% increase in recent filings versus the prior window — remains the most reliable signal.
↗ Hover for values · click a bar to ask EurekaTechnology composition
H02J (power supply and grid systems) is the overwhelmingly dominant class, reflecting the core inverter-to-grid interface problem. H02M (power conversion) and C25B (electrolytic production of compounds, covering electrolyzers) form a secondary layer, confirming that the electrolyzer coupling is an active area of claim drafting. H01M (batteries and fuel cells), F02B, F03D, G05F, and H02S each appear in only one or two records, marking the boundaries of current 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 operating an electrical grid
A method and system for operating an isolated AC grid with a fluctuating source of electric power (FSEP) generated from renewable energy, and with a fluctuating AC power demand (FACPD). A selectively driven alternator is couplable to an IC engine fueled from a hydrogen tank. A hydrogen generator is powered by the FSEP. The method includes powering the… (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | Method and system for operating an electrical grid | 2 |
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
A nascent corpus with extreme concentration and a very recent origin gives entrants clear signals about where barriers are forming and where they are not yet established.
Growth stage — field is still expanding on a multi-year basis
The lifecycle assessment places this field firmly in Growth, driven by a 1,600% increase in recent-window filings versus the prior period. Annual volume has eased from its 2022 peak, but this is consistent with normal cadence variation in a small corpus and is further compressed by publication lag. Foundational claims in grid-systems and power-conversion classes are still being filed and granted, meaning freedom-to-operate landscapes are actively shifting.
Growth stageAbsolute concentration across four specialists
The top five filers account for 100% of the top-100 ranked filers’ combined total, an unusually tight structure even for an emerging field. ABB and Vestesen together hold 15 of 21 families. Any new entrant faces a concentrated set of counterparties rather than a fragmented landscape, which simplifies freedom-to-operate analysis but raises licensing or design-around risk in core H02J and H02M claim space.
High concentrationNo co-applicant activity detected to date
The collaboration evidence shows no recorded co-filing arrangements among the current applicants. All 21 families appear to be filed by single assignees acting independently. This absence may reflect the field’s very early stage and competitive sensitivity, or the small number of actors. Cross-sector partnerships — for example between grid-inverter specialists and electrolyzer manufacturers — have not yet materialized in the patent record.
No co-filing detectedWIPO PCT leads; protection spread across key renewable-energy markets
WIPO (PCT) is the leading filing office with 6 records, consistent with applicants seeking broad international coverage early. Australia (4 records), Europe/EPO (3), and the United States (3) form the next tier, reflecting priority renewable-energy and hydrogen-policy jurisdictions. India (2), the UAE (1), Canada (1), and Denmark (1) round out the picture. The presence of Australia and India alongside traditional Western offices suggests applicants are targeting markets with active green-hydrogen infrastructure programs.
PCT-led, multi-marketGo 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.
ABB and Vestesen lead on volume; Vestas differentiates on electrolyzer-side IP
All four ranked applicants entered the field as new entrants within the recent filing window, confirming that no incumbent has a legacy position — the race for foundational IP is live.
ABB (Schweiz) AG
ABB leads with 8 patent families, all filed as a new entrant in the recent window. Its technology emphasis spans H02J 3 (grid systems, 7 records), H02M 1 and H02M 7 (power conversion, 6 and 5 records respectively), reflecting a vertically integrated inverter-to-grid claim strategy. This breadth across both grid-interface and conversion-stage IP gives ABB the widest blocking perimeter of any current filer.
families: 8Vestesen Hybrid Energy APS
Vestesen holds 7 patent families, entering as a new entrant alongside ABB. Its focus combines H02J 3 (grid systems, 7 records) with H01M 10 (batteries and fuel cells, 3 records) and H02J 7 (charging/storage interface, 3 records), positioning it at the intersection of grid-forming control and hybrid energy storage — a differentiated angle relative to ABB’s heavier power-conversion emphasis.
families: 7| Applicant | Recent (3 yrs) | Trend |
|---|---|---|
| ABB (Schweiz) AG | 6 | ▲ new entrant |
| Vestesen Hybrid Energy APS | 6 | ▲ new entrant |
| Vestas Wind Systems A/S | 3 | ▲ new entrant |
| Siemens Energy Global GmbH & Co. KG | 2 | ▲ new entrant |
Under-served adjacent branches worth monitoring
Four IPC classes are each represented by only one or two records in the corpus, indicating areas where grid-forming inverter concepts for renewable hydrogen have received minimal dedicated patent attention to date.
G05F · Electric/magnetic variable control
Only one record falls under G05F, covering variable electrical and magnetic regulation — a class directly relevant to voltage and frequency stabilization algorithms that underpin grid-forming inverter control loops. The scarcity is notable given that control-law IP is often the most defensible layer in inverter systems. An entrant with expertise in adaptive or model-predictive control could file foundational claims in this sub-domain with minimal direct overlap from existing filers, provided claims are anchored to the renewable-hydrogen system context.
Search this in Eureka →H02S · Photovoltaic / solar power generation
Only one record links grid-forming inverter IP to photovoltaic generation (H02S), despite solar-to-hydrogen being a commercially prominent pathway. The gap may reflect that most solar-hydrogen work currently sits under H02J without a specific H02S co-classification, or that dedicated solar-coupled grid-forming inverter systems have simply not yet been the subject of focused filing. This branch warrants monitoring as solar-hydrogen project pipelines mature and developers seek to differentiate system-level IP.
Search this in Eureka →How leaders differ across technology routes
Strength of each leader across the main technology routes.
| Player | H02J 3 · Power supply & grid systems | H02M 1 · Power conversion (AC/DC etc.) | C25B 1 · Electrolytic production of compounds | H02M 7 · Power conversion (AC/DC etc.) | H01M 10 · Batteries, cells & fuel cells |
|---|---|---|---|---|---|
| ABB (Schweiz) AG | Strong · 7 | Strong · 6 | Absent | Strong · 5 | Absent |
| Vestesen Hybrid Energy APS | Strong · 7 | Absent | Emerging · 1 | Absent | Moderate · 3 |
| Vestas Wind Systems A/S | Strong · 4 | Absent | Strong · 4 | Absent | Absent |
| Siemens Energy Global GmbH & Co. KG | Strong · 2 | Absent | Absent | Absent | Absent |
Frequently asked questions
The corpus contains 21 patent families. The field produced zero filings from 2017 through 2020, with all activity concentrated in 2021 onward, making it one of the youngest identifiable patent clusters in the renewable-energy space.
ABB (Schweiz) AG leads with 8 patent families, followed by Vestesen Hybrid Energy APS (7), Vestas Wind Systems (4), and Siemens Energy Global (2). All four entered as new filers in the recent window — no applicant holds a legacy position predating 2021.
H02J (power supply and grid systems) is dominant, appearing in 20 records. H02M (power conversion) and C25B (electrolytic production, covering electrolyzers) form a secondary layer with 6 and 5 records respectively. This distribution reflects the primacy of the inverter-to-grid interface problem, with electrolyzer coupling as a growing secondary focus.
WIPO (PCT) leads with 6 records, followed by Australia (4), Europe/EPO (3), and the United States (3). India (2), the UAE (1), Canada (1), and Denmark (1) also appear, suggesting applicants are targeting both traditional IP markets and jurisdictions with active green-hydrogen policy programs.
The field is in a Growth lifecycle stage, with a 1,600% increase in recent-window filings versus the prior period. Annual volume peaked in 2022 at six families and has eased since, but 2024 and 2025 figures are materially understated due to standard patent publication lag. The multi-year expansion trajectory is the most reliable indicator of momentum.
G05F (electric/magnetic variable control, 1 record) and H02S (photovoltaic/solar power generation, 1 record) are the sparsest adjacent branches relative to their technical relevance. G05F covers inverter control-law algorithms — a defensible layer with minimal current coverage — while H02S is sparse despite solar-to-hydrogen being a commercially active pathway. Both warrant further investigation before concluding they represent open filing opportunities.
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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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