The 65 Percent Question: Domestic Content and the 2029 Step-Up

The second door out of the Covered List — domestic manufacture under the Buy American standard — looks, from a distance, like the simpler one. No national-security review, no interagency queue. Just build it here. The distance is deceiving, and the reason is arithmetic.

The floor is a moving target

Qualification today requires 65 percent domestic component content. In 2029 the floor rises to 75. A bill of materials engineered to clear 65 with two points to spare is not a compliance achievement; it is a scheduled failure with a 2029 date on it. Every content strategy must be built against the number the product will face over its life, not the number in force at first certification.

Where the points actually come from

In an inverter, the heavy content — magnetics, power semiconductors, enclosures, boards — determines the outcome. The practical work is unglamorous: which subassemblies can move to US or qualifying suppliers at acceptable cost, in what order, and what the substantial-transformation analysis will bear. A Customs binding ruling, sought early, converts the riskiest judgment in the file into a settled one.

The grandfather clause is narrowing

A quieter development bears on every manufacturer and every buyer sitting comfortably on previously-authorized models. On June 26, 2026, the Commission prohibited importation and marketing of previously-authorized equipment from the legacy Covered List entries. On July 17 the bureaus proposed the same treatment for previously-authorized drones and section 1709 equipment of nine named entities, identified down to individual FCC IDs. On July 21 they went further, proposing to halt importation and marketing of an entire category of drones the Commission had already authorized, on capability criteria that include thermal imaging and LiDAR — obstacle avoidance, in other words, and inspection cameras. The escalation ran legacy entries, then named companies, then whole categories — and it has not stopped: a tenth named entity joined the docket on August 10, and on August 11 the Commission revoked a grantee's two authorizations outright over a false origin attestation, effective the day the order issued.

Read that last one slowly, because it is the part most readers skip. These are not new products seeking entry. They are products the Commission itself authorized, sitting in warehouses and on dealer shelves, proposed for removal from the market on the basis of features that were ordinary when they were approved.

This is the fact that breaks the most common posture we encounter. "We will wait and see" assumes the cost of waiting is zero and the risk runs one way: that new rules might arrive and inconvenience future products. The drone docket says otherwise. The position you are protecting by waiting is itself the thing being reconsidered, and a decision made in Washington can reach backward into inventory you have already bought, specified, or financed.

Two details make the point sharper for anyone holding grandfathered stock. First, the July 21 proposal carves out equipment that holds a Conditional Approval. On that precedent a Conditional Approval is not only the door to authorizing a new model — it is what keeps an already-authorized model marketable when a retroactive prohibition arrives. Second, grandfathered inverters and robotic devices are frozen on the side that matters. Covered equipment is excluded from the Commission's permissive-change rules, so a previously-authorized covered device cannot take a hardware change without a waiver — and the Commission has granted hardware waivers only in a handful of party-specific router cases. The Office of Engineering and Technology waived the prohibition in July for software and firmware updates that protect consumers — vulnerability patches, operating-system compatibility. Hardware was not restored for inverters or robotic devices, and no waiver reaches those categories. The first component that goes end-of-life and forces a hardware revision ends that SKU, because its replacement cannot be authorized. Corrected August 23, 2026: an earlier version of this paragraph stated that no waiver reaches hardware; five party-specific router waivers exist (DA 26-491, 26-571, 26-572, 26-641, 26-642). None applies to inverters or robotic devices.

So grandfathering decays on two clocks at once — one the Commission controls, and one your own bill of materials controls. The second is the one worth planning against, because it needs no further action in Washington to run out. "Our existing authorizations are safe" is a statement with a shortening half-life. Grandfathered SKUs are a wasting asset: a runway, not a shelter. The useful question is not whether the runway ends. It is which of your models are frozen, and when each one's bill of materials breaks.

The June 26 prohibition is in force. The July 17, July 21, and August 10 actions are public notices seeking comment (PS Dockets 26-184 and 26-189) — proposals, not rules, and none has been proposed for power inverters or advanced robotic devices as of this writing. The August 11 Order of Revocation (DA 26-839) is final agency action under a different rule — 47 CFR § 2.939(d), reaching false attestations rather than the import-marketing question. We cite these as precedent and direction, not as law governing those categories. Verify the current posture before relying on any of it.

The two doors are one strategy

The deepest error we see is treating Conditional Approval and domestic content as rival paths. The register says otherwise: approvals now arrive conditioned on onshoring plans, and onshoring plans mature into content qualification. The manufacturer who files for Conditional Approval this year, stands up final assembly next year, and crosses the content floor the year after has not chosen a door. It has walked through both, in order, on one set of documents.