In this dataset, it means an inverter design built from repeatable power-module blocks that can be added or removed to scale system capacity, rather than a fixed-capacity central unit. Claims typically cover the power module itself, how modules interconnect electrically, or standardized control and protection schemes that let modules operate together. Search strings combining string/PV inverter language with modular, standardized-power-module or scalable-inverter-design terms are how this landscape was assembled, and that combination is a reasonable starting point for a novelty search in this area.

The filing trend shows growth from 2 records in 2017 to a peak of 15 in 2020, followed by a fall back toward the 2022 midpoint of 6 and continued flat-to-declining activity. This pattern is typical of a technology where the core architecture claims — the module topology, the basic scaling scheme — were filed early, leaving later entrants to file narrower improvement claims rather than foundational ones. Note that the most recent year's figures are understated because publication lags filing by roughly eighteen months, so a modest uptick may not yet be visible in the data.

The assignee base is fragmented across corporate filers, a university board, and named individual inventors filing through personal holding companies, with only 9 co-assignee pairs across the full 82-family set. Recent-year momentum data shows every tracked assignee, including established power-electronics firms and academic-linked entities, at zero filings in the latest year, which suggests no single company is currently pulling ahead with a new filing push. A ranking table sits elsewhere on this page with the full assignee breakdown by family count.

Filing density is thin in areas adjacent to the core power-module and MPPT claims: inductance-free AC grid coupling, fault protection specific to distributed MPPT clusters, thermal management or cleaning integrated into modular power blocks, and standardized communication protocols between inverter modules at scale. These sit next to heavily claimed territory but are not yet crowded themselves. A first claim in these branches would need to tie the specific mechanism — for example, filter-free grid coupling via transformer winding inductance — to a modular or scalable inverter architecture rather than claiming the mechanism alone.

Citation counts in this dataset are useful for identifying which architecture ideas shaped later drafting, but they structurally favour older filings that have simply had more years to accumulate citations. The five most-cited records here are all variants of one distributed maximum-power-point-tracking lineage, with the top record cited 536 times, which reflects historical influence rather than current commercial deployment. A practitioner should treat high citation counts as a signal to study claim scope carefully, not as evidence that a technology is still the most active filing area.