"Multi-modal" is the adjective doing all the work in US12062919B2, granted to SigmaGen on August 13, 2024. MPPT is foundational prior art; the only place claim 1 can find novelty is in the "multi-modal" qualifier — so that is exactly where to read.
The premise of multi-modal MPPT is that no single tracking algorithm is best in all conditions. Under steady sun, a simple perturb-and-observe method works; under fast-changing irradiance or partial shading, a different mode performs better. Claim 1 fences a system that switches between optimization modes as conditions change. The CPC tags (H02M 3/158 for the converter regulation, H02J 2300/26 for PV control criteria) place it in the converter-control layer.
Reading the limitation strictly: the novelty is the mode-selection logic and the conditions that trigger switching. That is narrow — it does not cover MPPT, does not cover any single tracking mode, and is vulnerable to prior art if "switch algorithms based on conditions" was already disclosed. The defensibility depends on the specifics of the modes and the switching criteria.
Strategically, a mode-switching claim is the kind of incremental fence companies build to differentiate a product feature, not a category-defining patent. It protects "our MPPT adapts better than yours" — meaningful for marketing and for blocking direct copies, modest as a competitive moat.
The discipline: claim 1 owns SigmaGen's mode-switching scheme, not adaptive MPPT generally and certainly not MPPT. Competitors with different mode sets or switching logic are outside it. For the landscape, it is a 2024 data point that solar-converter IP has moved well past the fundamentals into fine-grained control optimization — the sign of a mature, crowded field where the remaining white space is in the adjectives.