String Inverter IoT Patents: Who Leads, Where the Gaps Are 2026
- Filing peaked in 2022 at 21 families, then flattened — the field is not accelerating, it is consolidating around claims already staked out.
- H02J power-supply and grid-systems claims dominate at 43 of 61 records, while measurement, protection and switchgear subclasses trail well behind, each in the single or low double digits.
- The most-cited record, US20210083506A1, sits at 78 citations, nearly double the next-ranked document — a strong signal of foundational load-management claims worth checking before filing nearby.
What this patent landscape covers
This landscape tracks patent families at the intersection of string inverter hardware and the wireless connectivity or IoT layer wrapped around it — remote monitoring, wireless data communication, and the control logic that turns telemetry into load or fault decisions. It excludes central inverter architectures and generic PV cell technology unless a filing explicitly claims a connectivity or monitoring function. The 61 published families in scope span receiving offices led by the United States, with meaningful activity in Canada, Australia, WIPO/PCT and Europe, indicating the commercial centre of gravity is Western grid markets rather than a single manufacturing hub.
Publication lags filing by roughly eighteen months, so 2025 and 2026 figures in any trend chart understate real filing activity; treat the last two data points as provisional rather than a genuine slowdown signal.
Filing trend and technology composition
Two views of the same 61-family dataset: how filing volume has moved year over year, and which IPC subclasses carry the claim weight.
A flat trajectory after a 2022 peak
Filings rose from zero in 2017 to a peak of 21 families in 2022, then eased off — consistent with an initial land-grab around remote monitoring and load-management claims followed by a period of consolidation rather than continued expansion. Because recent years are undercounted due to publication lag, the true 2025-2026 trend may sit somewhat higher than shown.
Power-systems claims dominate the composition
H02J (power supply and grid systems) accounts for 43 of 61 records, more than three times the next subclass. G01R (measurement), H02H (protection) and H02B (switchboards) each sit around 11-12 records, with B60L (EV propulsion), G05B (control systems), H01H (switches/relays) and G05F (variable control) forming a smaller tail — evidence that most claim activity concentrates on grid-facing power management rather than the sensing or switching hardware around it.
Shares are the percentage of the 61 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on String Inverter Wireless Connectivity and IoT with Eureka
This page is one run against one query. Ask Eureka your own question about string inverter wireless connectivity and iot and every answer comes back with the patent numbers behind it.
Try EurekaThe documents shaping this space
US20220216728A1 — Multilayer control for managing power flow
Control circuitry identifies, during operation in a first mode where power is limited by protection devices, an indicator to switch to a second mode. That indicator corresponds to power consumption nearing, achieving or exceeding a capacity limit. In response, the system retrieves reference information covering load preferences and limits, then manages loads, sources or both to modify power consumption or capacity based on that indicator and the retrieved reference data.Filed by SPAN.IO, INC., published 2022-07-07.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US20210083506A1 | Systems and methods for managing electrical loads | 78 |
| 2 | US20200259336A1 | Integrated electrical panel | 44 |
| 3 | US20230120740A1 | Integrated home energy management and electric vehicle charging | 38 |
| 4 | US20220216728A1 | Multilayer control for managing power flow | 37 |
| 5 | US20230120453A1 | Integrated home energy management, home monitoring, and automated fault mitigation | 24 |
| 6 | US20200112199A1 | Integrated electrical management system and architecture | 19 |
| 7 | US11552500B2 | Systems and methods for managing electrical loads | 13 |
| 8 | US11342754B2 | Integrated electrical panel | 12 |
| 9 | US12062901B2 | Integrated electrical management system and architecture | 9 |
| 10 | US20220216697A1 | Integrated electrical panel | 8 |
Citation counts favour older, earlier-filed records within a searched corpus; treat this as a measure of influence on later filings, not a ranking of current commercial relevance.
Each row carries its publication number; clicking a row searches Eureka by that number.
Put your own technology through the same analysis
Eureka on the web
When you want the answer in the next five minutes.
The agent works the prompt against patents and technical literature, citing every source.
Run your analysis now →MCP server & REST API
When it has to run inside your own pipeline.
Patent search, landscape analysis and assignee resolution as MCP tools. Drop them into any agent framework, or call REST directly.
Browse MCP servers →What the numbers actually indicate
Four data points worth pausing on before treating this as a growth market or a crowded one.
Growth already plateaued
Filings climbed from nothing in 2017 to a peak of 21 families in 2022 and have not exceeded that since. Combined with the 18-month publication lag, this points to a technology area that saturated its initial claim space quickly rather than one still in early expansion.
One subclass carries most of the weight
H02J covers more than two-thirds of the dataset, meaning power-supply and grid-management claims are the densest prior art to search before drafting anything touching load control, power flow or grid interaction logic.
A single document sets the reference point
US20210083506A1 is cited 78 times, close to double the second most-cited record at 44. New filings on electrical load management or panel integration should expect examiners to cite it as a baseline reference.
Filing is US-centred but not exclusive
The United States accounts for less than half of all filings, with Canada, Australia, WIPO/PCT and Europe each contributing a handful. This is a moderately international filing pattern rather than a single-jurisdiction niche.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to string inverter wireless connectivity and iot, with the prior art for and against each one.
Who is filing, and where the field is still open
Recent-year momentum across tracked assignees shows a common pattern in a plateaued field: several entities that filed actively in earlier years show zero filings in the latest tracked year, a sign of either portfolio pause or a shift to trade-secret strategy rather than continued patenting.
Broad pullback from active filing
Several assignees that appear in the ranking, including large technology and energy-panel filers, show no filings in the most recent tracked year and year-over-year drops of -100% where prior activity existed. This is consistent with a field where core claim positions were staked earlier and filers are now defending rather than expanding them.
A modest, specialised dataset
At 61 total families, this is a narrow but well-defined niche rather than a sprawling technology area. Concentration in a handful of assignees means a new entrant's freedom-to-operate analysis is tractable — a small number of documents to clear rather than hundreds.
Filers are hedging across markets
Activity spread across the US, Canada, Australia, WIPO, Europe and India suggests assignees with commercial ambitions beyond a home market, rather than defensive domestic-only filing.
| Assignee | Recent year | YoY |
|---|---|---|
| Energy Input Output Smart Panel Co., Ltd. | 0 | -100% |
| Google LLC | 0 | — |
| POWERFLEX SYST INC | 0 | -100% |
| Shenzhen Qianhai Huazhao New Energy Co., Ltd. | 0 | — |
| SRI LASYA | 0 | -100% |
| FRANCIS XAVIER ENG COLLEGE | 0 | -100% |
Where to take this analysis
The dataset points to specific next actions depending on whether you are clearing a filing or scoping a claim.
Run a freedom-to-operate check against the H02J cluster
With 43 of 61 records sitting in power-supply and grid-systems claims, any new filing touching load management, power flow control or grid interaction should be checked against this cluster first, starting with the most-cited records.
Explore claims in Eureka →Scope claims in the under-claimed branches
Sub-areas like variable-control firmware and relay-level wireless diagnostics show thinner filing density than the core cluster, and may offer clearer white space for a first claim.
Map white space in Eureka →Track assignee momentum before committing R&D
Several filers show zero activity in the latest tracked year. Confirming whether that reflects portfolio pause, acquisition, or a shift to other jurisdictions changes how much weight to give their existing claims.
Monitor assignees in Eureka →Common questions on this landscape
There are 61 published patent families in this dataset covering string inverter or PV/solar inverter systems combined with remote monitoring, IoT connectivity or wireless data communication claims, spanning 2015 through the 2026 data cut-off. This is a narrow, well-defined niche rather than a broad technology field. Because publication lags filing by roughly 18 months, the true count for 2025 and 2026 filings is understated in any trend view.
Filing activity is spread across a mix of energy-panel companies, technology firms and individual filers, with several showing no activity in the most recent tracked year. Rather than a single dominant assignee, the pattern is one of concentrated early filing followed by a plateau, so freedom-to-operate work should focus on cited prior art like US20210083506A1 rather than assuming one company controls the space.
Filings grew from zero in 2017 to a peak of 21 families in 2022, then flattened rather than continuing to climb. That plateau, combined with several assignees showing zero filings in the latest year, suggests the field has moved from initial claim-staking into a consolidation phase. The most recent one to two years should still be read cautiously given publication lag.
US20220216728A1, assigned to SPAN.IO, INC. and published mid-2022, claims control circuitry that detects when power consumption is nearing or exceeding a capacity limit and then switches operating modes by retrieving stored load preferences and limits to manage loads or sources accordingly. This blocks straightforward implementations of threshold-triggered load-shedding logic that rely on a stored preference table and a two-mode operating structure. Designers working on similar dynamic load management should review its specific claim language on the mode-switching indicator and the reference-information retrieval step before building comparable logic.
The dataset shows dense claim coverage in H02J power-supply and grid-systems logic but comparatively thin coverage in adjacent areas such as G05F variable-control firmware, relay-level wireless diagnostics under H01H, and EV-charging co-optimisation with string inverters under B60L. These branches show meaningfully fewer records than the core H02J cluster, which makes them more promising areas to scope a first claim rather than filing directly against the densest prior art.
Research String Inverter Wireless Connectivity and IoT in depth with Eureka
Go past this page: query the whole string inverter wireless connectivity and iot corpus yourself, in your own scope.
Every answer comes back with patent numbers you can open.
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.
Machine translation. Assignee and organisation names originally recorded in Chinese, Japanese or Korean have been rendered into English by an AI translation step so that the tables stay readable. These renderings are best-effort and may not match a company’s registered English name; the original name is what the underlying patent record carries, and it is what any Eureka query launched from this page uses.