SunSpec-Tigo solar IPR appeal turns on 'predetermined number' claim scope

SunSpec Alliance's IPR appeal against Tigo Energy added solar electronics to the 2025 PTAB docket.

The dispute included Board interpretation of 'predetermined number' and whether the Board's findings effectively established claim scope even without a formal construction label.

For clean-energy patent owners, the case shows how solar hardware and communications claims can turn on small numerical and control-logic phrases.

For PTAB practitioners, it is another reminder that an implicit construction can drive the final written decision and become the center of the appeal.