Grid-Forming Inverter for Desalination Plants Patent Landscape
Grid-Forming Inverter for Desalination Plants Patent Landscape in 2026
The patent corpus for grid-forming inverters applied to desalination plants is extremely small, with only 4 patent families on record and two identified filers, signaling a technology at the very earliest stages of dedicated IP formation. Rondo Energy Inc holds the dominant position, and the field recorded its first meaningful activity in 2023, making this a wide-open area for new entrants willing to establish foundational claims.
Rondo Energy leads a highly concentrated, nascent field with only two filers on record
The landscape is exceptionally concentrated: Rondo Energy Inc accounts for 3 of 4 patent families, and together the top two filers — Rondo Energy Inc and Energy Internet Corp — represent the entire ranked corpus. This level of concentration is rarely seen and reflects a field where systematic IP strategy has not yet materialized at scale.
The top five filers collectively hold 100% of the top hundred filers’ combined total, which in practice collapses to just two entities. There is no discernible second tier; Energy Internet Corp holds a single family, creating an immediate and substantial gap behind the leader.
| # | Applicant | Patent families | Share |
|---|---|---|---|
| 1 | Rondo Energy Inc | 3 | |
| 2 | Energy Internet Corp | 1 |
Rondo Energy’s position implies an early-mover advantage if it continues to file, but the absolute portfolio size remains too small to constitute a defensive barrier. A committed entrant filing systematically across core grid-forming control topologies could close the gap quickly.
The most recent filing years are further understated by the typical 18–24 month patent publication lag; the true volume of activity since 2023 may be higher than current records indicate. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
A single 2023 burst drives multi-year growth; H02J dominates the technology mix
The filing trend and technology composition together tell a coherent story: a dormant field through 2022 that produced its first cluster of filings in 2023, concentrated almost entirely in grid and power-supply systems.
Annual filing trend
Activity was flat from 2017 through 2022, with a single family filed in 2020. Three families appeared in 2023, representing the field’s first meaningful cohort. The years 2024–2026 show zero recorded filings, but given the 18–24 month publication lag, this almost certainly understates real activity rather than signaling a reversal. The three-year recent window sits well above the prior three-year baseline, confirming a growth-stage trajectory even as annual volume has eased from the 2023 peak.
↗ Hover for values · click a bar to ask EurekaTechnology composition
All 4 families carry an H02J classification (power supply and grid systems), confirming that grid-interface and inverter-control concepts are the defining technical core. Secondary branches — F03B (hydraulic machines and engines) and F03C (positive-displacement hydraulic engines) — each appear once, associated with Energy Internet Corp’s single family and suggesting an interest in hydro-coupled or wave-energy integration with desalination. These secondary branches are sparse relative to H02J.
↗ 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.
Energy management using electronic flywheel
Disclosed techniques include energy management using an electronic flywheel. A plurality of AC electrical power sources is obtained, where the sources are both parallel to and independent from each other. At least one of the plurality of AC sources comprises a motor-generator. The plurality of AC sources is coupled to an AC power grid using an electronic… (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | System for voltage-controlled power grid regulatio… | 6 |
| 2 | Energy management using electronic flywheel | 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
Four observable dimensions — maturity, concentration, collaboration, and geography — each carry specific strategic implications for teams evaluating entry into this space.
Growth stage, easing from a 2023 peak
The field is classified as Growth: the recent three-year filing window sits well above the prior three-year baseline, confirming expansion on a multi-year basis. Annual volume has eased from its 2023 peak, though this is partly an artifact of publication lag. The absence of filings before 2020 and the small absolute corpus indicate that foundational IP frameworks are still being written, leaving room for broad claims.
Growth stageTwo-player market with a dominant leader
The top five filers hold 100% of the top hundred filers’ combined total — in practice just two entities. Rondo Energy Inc holds three patent families versus one for Energy Internet Corp. This extreme concentration means there is no established defensive thicket, but it also means a new entrant faces a clear benchmark: surpass Rondo Energy’s portfolio depth to become the recognized IP leader in the space.
High concentrationNo co-applicant activity recorded
The collaboration data show no co-filed patents between any pair of applicants in this corpus. This absence is consistent with a pre-commercial field where industry consortia, university partnerships, and joint development agreements have not yet translated into co-owned IP. It also means there are no entrenched alliance structures that a new entrant would need to navigate or match.
No co-filingsUS-anchored with early PCT coverage
The United States leads with 2 patent records, followed by Australia with 1 and WIPO (PCT) with 1. The PCT filing indicates at least one applicant has sought international coverage, but the geographic footprint remains narrow. Key desalination markets — the Gulf Cooperation Council states, Spain, and China — show no recorded filings, representing unguarded jurisdictions for a challenger willing to file broadly.
US + PCTGo 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.
Rondo Energy leads on volume; Energy Internet Corp holds the only hydraulic-linked family
With only two filers in the ranked corpus, the competitive map is unusually simple. Rondo Energy Inc is the clear volume leader; Energy Internet Corp occupies a distinct technical niche bridging hydraulic energy systems and grid supply.
Rondo Energy Inc
Rondo Energy Inc holds 3 patent families, all classified under H02J (power supply and grid systems), with specific emphasis on H02J 3 (AC power supply network control) and H02J 15. All of its families were filed as a new entrant appearing in the 2023 cohort, with momentum recorded as a new entrant with an upward trajectory. Its portfolio constitutes three-quarters of the entire identified corpus.
families: 3Energy Internet Corp
Energy Internet Corp holds 1 patent family, distinguished by coverage across F03B 13 (hydraulic machines), F03C 1 (positive-displacement hydraulic engines), and H02J 3 — a combination suggesting integration of hydraulic or wave-energy conversion with grid-forming inverter functionality. This cross-domain positioning differentiates it from Rondo Energy’s pure grid-systems focus.
families: 1| Applicant | Recent (3 yrs) | Trend |
|---|---|---|
| Rondo Energy Inc | 3 | ▲ new entrant |
Under-served adjacent branches worth monitoring
With only two IPC branches appearing outside the dominant H02J class — and each with just one record — the corpus itself does not yield a statistically rich white-space map. The observations below identify adjacent areas where the evidence suggests relative sparsity and plausible technical value.
F03B · Hydraulic machines integration
F03B appears once in the corpus, linked to Energy Internet Corp’s single family. For desalination plants co-located with run-of-river, tidal, or pressure-recovery hydropower, coupling hydraulic energy conversion with a grid-forming inverter is technically coherent — pressure-recovery devices in reverse-osmosis plants already recover mechanical energy, and inverter-based grid-forming control of that output is an under-patented sub-problem. The single existing filing does not constitute a barrier.
Search this in Eureka →Islanded microgrid control for remote desalination
The H02J corpus covers grid-systems broadly, but no evidence in the 4-family corpus points to islanded microgrid architectures specifically tailored to off-grid or remote desalination contexts — a configuration common in water-scarce arid regions where grid connection is unavailable. This sub-problem sits within H02J but appears unaddressed by current filers, representing a plausible area for targeted claims provided a team can demonstrate technical differentiation from general microgrid prior art.
Search this in Eureka →How Rondo Energy and Energy Internet Corp differ by technology route
Strength of each leader across the main technology routes.
| Player | H02J 3 · Power supply & grid systems | H02J 15 · Power supply & grid systems | F03B 13 · Hydraulic machines & engines | F03C 1 · Positive-displacement hydraulic engines | H02J 7 · Power supply & grid systems |
|---|---|---|---|---|---|
| Rondo Energy Inc | Strong · 3 | Strong · 2 | Absent | Absent | Absent |
Frequently asked questions
The current corpus contains 4 patent families. This is a very small body of dedicated IP, reflecting the early and specialized nature of the intersection between grid-forming inverter technology and desalination plant applications.
Rondo Energy Inc is the leading filer, holding 3 of the 4 identified patent families. Energy Internet Corp holds the remaining family. No other applicants appear in the ranked corpus.
The first recorded family appeared in 2020, followed by a gap, and then a cluster of 3 families in 2023 — the field’s only meaningful cohort to date. Years after 2023 show zero recorded filings, but publication lag of 18–24 months means recent activity is likely understated in the current data.
Patent records exist in the United States (2 records), Australia (1 record), and via WIPO PCT (1 record). Major desalination markets such as Gulf Cooperation Council states, Spain, and China show no recorded filings in the current corpus.
All 4 families carry an H02J classification, covering power supply and grid systems. Secondary branches F03B (hydraulic machines and engines) and F03C (positive-displacement hydraulic engines) each appear once, associated with Energy Internet Corp’s family.
The field is classified as Growth stage with extremely few existing families and no co-applicant activity. The absence of a defensive patent thicket, the narrow geographic footprint, and the sparse coverage of sub-topics such as islanded microgrid control and pressure-recovery integration suggest that a focused filing program could establish a meaningful position quickly. R&D teams should assess their differentiation from general H02J prior art before proceeding.
Ready to map your own grid-forming inverter landscape?
Join 18,000+ innovators using PatSnap Eureka to map any technology landscape: search 2B+ patents and papers, surface key assignees, and generate a report like this in minutes.
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.
Nothing on this page constitutes an exhaustive prior-art, novelty, freedom-to-operate, or validity search, nor does it constitute legal, financial, investment, or professional advice, and it should not be relied upon as such. Any patent, commercial, or strategic decision should be verified independently and reviewed with qualified patent, legal, and domain professionals. PatSnap makes no warranties, express or implied, as to the accuracy, completeness, or fitness for any particular purpose of the information presented.