Grid-Forming Inverter for Microgrids Patent Landscape
Grid-Forming Inverter for Microgrids Patent Landscape in 2026
The grid-forming inverter for microgrids field has expanded sharply on a multi-year basis, with recent three-year filings running 238% above the prior three-year window, though annual volume has eased from its 2023 peak. Bloom Energy Corp holds the top position among applicants, but the field remains fragmented with industrial incumbents, utilities specialists, and research institutions all active.
Bloom Energy leads a fragmented, growth-stage field
Bloom Energy Corp leads the top five filers account for 25% of the combined total across the hundred largest filers, signaling a moderately fragmented competitive structure without a dominant lock-in position.
No single player holds a commanding share, and the gap between the leader and the second tier is relatively narrow. Industrial conglomerates (GE entities, Siemens, ABB), energy technology specialists (Bloom Energy, NewSouth Innovations, Pxise Energy Solutions), and public research organizations (Fraunhofer, Battelle Memorial Institute, Georgia Tech Research Corp) all appear in the top tier, reflecting a diverse ecosystem rather than consolidation around one architecture.
| # | Applicant | Patent families | Share |
|---|---|---|---|
| 1 | Bloom Energy Corp | 16 | |
| 2 | General Electric Renovables España SL | 9 | |
| 3 | GE Vernova Infrastructure Technology LLC | 8 | |
| 4 | Siemens AG | 8 | |
| 5 | NewSouth Innovations Pty Ltd | 7 | |
| 6 | ABB (Schweiz) AG | 7 | |
| 7 | GE Infrastructure Tech LLC | 7 | |
| 8 | Powerhouse (by Synertec) Pty Ltd | 6 | |
| 9 | Fraunhofer-Gesellschaft zur Forderung der Angewandten Forschung | 6 | |
| 10 | Zola Electric Labs Inc | 6 |
| # | Applicant | Patent families | Share |
|---|---|---|---|
| 11 | Battelle Memorial Institute | 6 | |
| 12 | University of Kiel | 5 | |
| 13 | Pxise Energy Solutions LLC | 5 | |
| 14 | Georgia Tech Research Corporation | 5 | |
| 15 | General Electric Technology GmbH | 4 | |
| 16 | Indian Institute of Technology | 4 | |
| 17 | Nikitin Alexei V | 4 | |
| 18 | General Electric Co | 4 | |
| 19 | Toshiba Corporation | 4 | |
| 20 | Ford Global Technologies LLC | 4 |
Bloom Energy’s lead, concentrated in grid and power-supply systems (H02J3), suggests a strategy oriented toward integrating grid-forming capability into its fuel-cell microgrid platforms. GE’s presence across multiple entity names points to distributed R&D activity that may be consolidating under GE Vernova. Siemens AG’s parallel position in grid systems and control adds breadth to their industrial automation portfolio.
Filing counts for 2024–2026 are understated due to standard patent publication lag; the apparent flattening in those years should not be read as a demand signal. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
A 2023 filing surge anchors multi-year growth; H02J dominates the technology mix
The annual filing trend and the IPC technology composition together show a field that surged in 2022–2023 and is still expanding on a multi-year basis, concentrated heavily in power-supply and grid-systems patents.
Annual filing trend
Filings rose from 7 in 2018 to a peak of 52 in 2023, then recorded 45 in 2024 and 33 in 2025. The 2024–2026 bars are further understated by publication lag, so the true recent-period level is higher than shown. The three-year recent window is 238% above the prior three-year window, confirming genuine multi-year growth despite the post-peak annual moderation.
↗ Hover for values · click a bar to ask EurekaTechnology composition
H02J (Power supply and grid systems) is the dominant branch, reflecting the core grid-integration challenge. H02M (Power conversion) is the second-largest branch, capturing inverter circuit and topology work. G05B (Control and regulating systems), H02H (Protective circuit arrangements), and G05F (Electric/magnetic variable control) form a secondary cluster, pointing to active R&D in control algorithms, fault ride-through, and voltage regulation for islanded operation.
↗ 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.
Minimum-resource, multiple-microgrid black start d…
Methods for performing a black start in a power system and corresponding systems. A method (<b>200</b>) includes starting (<b>100</b>) a first anchor grid-forming inverter (<b>122</b>) in a first microgrid (<b>110</b>) and starting (<b>100</b>) a second anchor grid-forming inverter (<b>122</b>) in a second microgrid (<b>120</b>). The first microgrid… (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | Emergency Load Management Using A DC Microgrid Dur… | 42 |
| 2 | Distributed energy resource management system | 36 |
| 3 | Design, deployment, and operation of modular micro… | 31 |
| 4 | Using distributed power electronics-based devices … | 21 |
| 5 | Controllers for Regulated Power Inverters, AC/DC, … | 21 |
| 6 | System-level overload ride-through control strateg… | 19 |
| 7 | Cyber-resilient sliding mode consensus-based distr… | 15 |
| 8 | Virtual impedance current limiting control for gri… | 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 competitive structure means for R&D investment decisions
Four structural observations — maturity stage, applicant concentration, collaboration patterns, and geographic reach — shape the investment risk and entry calculus for this field.
Growth stage, easing from 2023 peak
The field is classified as Growth based on recent three-year filings running 238% above the prior three-year window. Annual volume peaked at 52 filings in 2023 and has moderated since, consistent with a maturing growth phase rather than an emerging one. Engineers entering now face an increasingly populated prior-art landscape but can still find differentiation in secondary branches.
Growth stageFragmented top tier — no lock-in risk yet
The top five filers hold 25% of the combined total among the hundred largest filers, and no applicant exceeds 16 patent families. This low concentration means freedom-to-operate risks are spread across many holders rather than concentrated in one blocking portfolio. It also means the field is still contestable for a well-funded entrant with differentiated control or protection technology.
Low concentrationNo co-applicant data available in current evidence
The collaboration data for this topic is evidence pending — no co-applicant filing pairs are recorded in the current dataset. The presence of multiple research institutions (Fraunhofer, Battelle, Georgia Tech, Indian Institute of Technology) alongside industrial applicants suggests potential for academic-industry partnerships, but no formal co-filing activity is confirmed in the evidence.
Evidence pendingUS-centric filing, limited China exposure
The United States is the leading filing jurisdiction, followed by the EPO and WIPO (PCT). India ranks fourth, reflecting both local demand for off-grid microgrids and active academic filing. China shows only 3 patent records despite being a major grid-inverter manufacturer, indicating either limited protection strategy in China or a gap in the current corpus. Australia’s presence tracks NewSouth Innovations and Powerhouse (by Synertec) as local applicants.
US-led, India risingGo 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.
Bloom Energy and GE entities lead; Siemens adds control-systems depth
The top two applicant slots are held by Bloom Energy Corp and GE Renovables España, with Siemens AG and GE Vernova closely behind. Momentum data show all tracked leaders entered the active filing window as new entrants relative to the prior period.
Bloom Energy Corp
Bloom Energy Corp leads with 16 patent families and a momentum trend of new entrant, meaning its active filing base emerged in the recent window. Its technology focus centers on H02J3 (grid-interconnection systems) and H02J13 (remote monitoring and control of power networks), reflecting an integration strategy for grid-forming capability within its solid-oxide fuel-cell microgrid platforms. The H02M1 work indicates parallel inverter-circuit-level development.
families: 16GE Renovables España SL
GE Renovables España SL holds 9 patent families, also classified as a new entrant in the recent filing window, with technology emphasis squarely on H02J3 (grid-systems interconnection). Taken together with GE Vernova Infrastructure Technology LLC (8 families, H02J3 and H02J13) and GE Infrastructure Tech LLC (7 families), the broader GE cluster represents a combined presence that rivals or exceeds any individual competitor. F03D7 (wind turbine control) co-appearing in the GE entities signals grid-forming work tied to wind-plus-storage microgrid configurations.
families: 9| Applicant | Recent (3 yrs) | Trend |
|---|---|---|
| Bloom Energy Corp | 14 | ▲ new entrant |
| General Electric Co | 14 | ▲ new entrant |
| General Electric Renovables España SL | 7 | ▲ new entrant |
| ABB (Schweiz) AG | 5 | ▲ new entrant |
| GE Vernova Infrastructure Technology LLC | 6 | ▲ new entrant |
| Fraunhofer-Gesellschaft zur Forderung der Angewandten Forschung | 4 | ▲ new entrant |
| Battelle Memorial Institute | 1 | ▲ new entrant |
Under-served adjacent branches worth monitoring
Several IPC branches appear at low share within the corpus despite having clear technical relevance to grid-forming inverter deployments; they represent observations of relative sparsity rather than confirmed market gaps.
H02H · Protective circuit arrangements
H02H accounts for only 14 patent records (4% share), yet fault detection and overcurrent protection are critical design challenges for grid-forming inverters operating in islanded microgrids where fault current is inherently limited. The sparsity relative to H02J suggests protection-scheme innovation — including virtual impedance-based limiting and adaptive overcurrent strategies — remains undercrowded. Teams with existing H02J grid-systems portfolios could extend into H02H with targeted filing on protection algorithms specific to low-inertia islanded networks.
Search this in Eureka →G05B · Control & regulating systems
G05B holds 20 patent records (6% share), making it the largest of the under-served adjacent branches relative to the dominant H02J. Control-system architectures — including droop control, virtual synchronous machine implementations, and model predictive control — are foundational to grid-forming behavior, yet their explicit capture under G05B remains sparse. This branch has plausible technical value for applicants seeking to protect control-layer IP separately from power-circuit claims, and it could serve as a differentiation vector for software-defined or AI-assisted microgrid controllers (noting G06N has only 2 records in the corpus).
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.) | H02M 7 · Power conversion (AC/DC etc.) | H02J 13 · Power supply & grid systems | H02J 7 · Power supply & grid systems |
|---|---|---|---|---|---|
| Bloom Energy Corp | Strong · 13 | Moderate · 4 | Moderate · 3 | Moderate · 5 | Absent |
| ABB (Schweiz) AG | Strong · 6 | Strong · 6 | Strong · 5 | Absent | Absent |
| General Electric Co | Strong · 13 | Absent | Emerging · 2 | Absent | Absent |
| Powerhouse (by Synertec) Pty Ltd | Strong · 6 | Absent | Absent | Strong · 4 | Strong · 5 |
| NewSouth Innovations Pty Ltd | Strong · 7 | Absent | Absent | Strong · 7 | Absent |
| Zola Electric Labs Inc | Strong · 6 | Absent | Absent | Strong · 4 | Strong · 4 |
Frequently asked questions
The current evidence covers 200 patent families in scope globally.
Bloom Energy Corp leads with 16 patent families, ahead of GE Renovables España SL at 9 and GE Vernova Infrastructure Technology LLC and Siemens AG, each at 8.
The field is in a Growth stage: recent three-year filings are 238% above the prior three-year window on a multi-year basis. However, annual volume peaked at 52 filings in 2023 and has moderated since; the most recent years (2024–2026) are further understated by publication lag.
The United States is the leading jurisdiction, followed by the EPO (Europe), WIPO (PCT), and India. China shows only limited filings in the current corpus, despite being a major inverter manufacturer.
H02J (Power supply and grid systems) is dominant. H02M (Power conversion) is the second-largest branch. Adjacent branches such as H02H (Protective circuit arrangements) at 14 records and G05B (Control and regulating systems) at 20 records are comparatively sparse relative to their technical importance.
No co-applicant filing pairs are recorded in the current evidence set. Multiple research institutions are present as independent filers, suggesting collaboration is happening informally or has not yet materialized as joint patent applications in this corpus.
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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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