VRFB HVDC (Weak Cross) Patent Snapshot 2026
This is an extremely narrow field—17 patent families in scope—entirely dominated by the Nextracker/NextPower corporate cluster, which holds all ranked positions. Activity peaked sharply in 2019 and has since declined, signalling a field in contraction with limited new entrants.
Nextracker/NextPower cluster controls all ranked positions
The top-ranked applicant, NEXTPOWER LLC, leads with 10 patent families, followed by NEXTPOWER LLC US and NEXTRACKER INC at 3 patent families each, and NEXTRACKER LLC at 1 patent family. All four ranked applicants are entities within the same Nextracker/NextPower corporate group.
The top five filers account for 100% of the ranked applicants visible in this query’ combined total, confirming extreme concentration with no meaningful competition from outside the founding cluster.
| # | Applicant | Patent families | Share |
|---|---|---|---|
| 1 | NEXTPOWER LLC | 10 | |
| 2 | NEXTPOWER LLC US | 3 | |
| 3 | Nextracker Inc. | 3 | |
| 4 | Nextracker LLC | 1 |
This monopolistic posture means any new entrant would be navigating a tightly held IP position; however, the small absolute corpus size also implies the field remains technically immature and could be disrupted by a focused filing campaign.
The most recent 18–24 months are subject to publication lag and likely under-represent any very recent activity; the decline reading reflects the post-2019 pattern, not necessarily a permanent exit by all participants. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
A single 2019 burst defines the filing history; H02J dominates the technology mix
The annual trend chart reveals an anomalous spike in 2019 followed by near-zero activity, while the technology composition chart shows H02J (power supply and grid systems) as the near-exclusive technical focus.
Annual filing trend
Eleven of the 17 patent families were filed in 2019, with a secondary cluster of 4 in 2022 and isolated filings in 2020. Years 2021 and 2023 onward show zero recorded filings. The recent-window growth figure of -69% reflects this steep drop from the 2019 peak; the most recent 18–24 months should be treated as potentially under-counted due to publication lag, but the broad shape of decline is clear.
↗ Hover for values · click a bar to ask EurekaTechnology composition
H02J (power supply and grid systems) accounts for all 17 records in the corpus, confirming that DC power conversion and grid interconnection architecture is the sole technical focus. H02S (photovoltaic/solar power generation) appears as a secondary branch with 6 records, indicating that the HVDC applications are coupled with solar generation. G05F (electric/magnetic variable control) is a sparse tertiary branch with only 2 records.
↗ 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.
Systems and methods of DC power conversion and tra…
Systems and methods integrate advanced solar tracker, battery, inverter, and software technologies to improve performance, plant output, and costs. The systems may incorporate an advanced vanadium flow battery (VFB) that is DC-voltage (DV)-coupled to photovoltaic (PV) arrays for high, round-trip efficiency. The systems incorporate a DC architecture that… (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | Systems and methods of DC power conversion and tra… | 20 |
| 2 | Systems and methods of DC power conversion and tra… | 6 |
| 3 | Systems and methods of DC power conversion and tra… | 5 |
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.
Assignee snapshot from the current evidence set
The applicants below are visible in this query result. Because the evidence set is relatively small, read this section as a directional snapshot rather than a full competitive ranking.
NEXTPOWER LLC
NEXTPOWER LLC holds 10 patent families, making it the corpus leader. Its technology emphasis is concentrated in H02J 1 and H02J 3 (power supply and grid systems), with secondary coverage in H02J 7. Recent filing trend is marked as a new entrant in the momentum data, reflecting that its filings are relatively recent in the tracking window. The company sits at the center of the intra-group co-filing network.
patent families: 10NEXTRACKER INC
NEXTRACKER INC holds 3 patent families and shares its H02J 3 and H02J 1 focus with the group leader. Its momentum trend shows a –80% decline in recent filings versus its prior period, suggesting the parent entity has shifted filing activity toward affiliated vehicles such as NEXTPOWER LLC. Co-filing ties with Nextracker LLC and NEXTPOWER LLC confirm its role as a founding contributor to the group’s IP base.
patent families: 3Frequently asked questions
The corpus contains 17 patent families in scope. This is a very small corpus, indicating the field is nascent and technically narrow.
The Nextracker/NextPower corporate cluster holds all ranked positions. NEXTPOWER LLC leads with 10 patent families, followed by NEXTPOWER LLC US and NEXTRACKER INC each with 3, and NEXTRACKER LLC with 1. No external applicants appear in the ranked list.
Filing activity peaked in 2019 with 11 families recorded in that year. Activity has since declined sharply, with a recent-window growth figure of -69%. The lifecycle stage is assessed as Decline. Note that the most recent 18–24 months may be under-counted due to publication lag.
Europe (EPO) is the lead jurisdiction with 5 records, followed by Australia and the United States each with 4 records, India with 2 records, Austria with 1 record, and WIPO (PCT) with 1 record.
H02J (power supply and grid systems) covers all 17 records and is the visible branch. H02S (photovoltaic/solar power generation) appears with 6 records and G05F (electric/magnetic variable control) with only 2 records. G05F is the most sparsely covered branch and represents an adjacent area where little IP has been established.
All identified co-filing activity is internal to the Nextracker/NextPower group. The three most active co-filing pairs—Nextracker Inc. with Nextracker LLC, Nextracker Inc. with NEXTPOWER LLC, and Nextracker LLC with NEXTPOWER LLC—each share 4 joint families. There is no evidence of external collaboration with universities, utilities, or other industry players.
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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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