Tigo Energy Inc. v. SunSpec Alliance

Background

Tigo Energy Inc. develops technology for rapidly shutting down solar-panel systems during emergencies. Tigo owns U.S. Patent No. 8,933,321, which concerns a system for making a solar array safe during an emergency. Claims 1, 12, and 13 were at issue.

SunSpec Alliance is an information standards and certification organization. It published rapid-shutdown specifications designed to align with requirements in the National Electric Code. When a SunSpec member sought certification for a product, a SunSpec-authorized laboratory performed tests required by SunSpec’s specifications, under what Tigo alleged was SunSpec’s direction and control. SunSpec then received the testing report and decided whether to certify the product.

Tigo alleged that SunSpec’s specifications required or described systems covered by the ’321 Patent. It asserted that SunSpec directly infringed the patent by directing laboratories to test members’ products, and that SunSpec was legally responsible for the laboratories’ actions because it controlled or directed their testing. Tigo also alleged that SunSpec induced the laboratories, members, and members’ customers to infringe.

Legal Standard

The court applied Federal Rule of Civil Procedure 12(b)(6), which requires dismissal when a complaint does not state a legally sufficient claim. At this stage, the court accepts well-pleaded allegations as true and draws reasonable inferences for the plaintiff. The complaint must contain enough facts to make liability plausible, rather than merely possible. The court does not resolve factual disputes or decide whether the allegations will ultimately be proven.

Direct Infringement

Tigo alleged direct infringement under 35 U.S.C. § 271(a), which covers unauthorized making, using, offering to sell, selling, or importing of a patented invention. Tigo relied on both literal infringement and the doctrine of equivalents. Under the doctrine of equivalents, an accused product or process may infringe even if it does not literally meet a patent claim, when the differences are insubstantial or the accused element performs substantially the same function, in substantially the same way, to achieve substantially the same result.

The court held that Tigo plausibly alleged that the authorized testing laboratories used or made systems covered by the patent while testing products for compliance with SunSpec’s specifications. Tigo also plausibly alleged that SunSpec exercised enough direction or control over the laboratories to potentially be legally responsible for their actions, even though SunSpec did not itself conduct the tests. SunSpec’s contrary assertions—that the laboratories followed their own practices and that the testing specification was voluntary or merely informative—created factual disputes that could not be resolved on a motion to dismiss.

The court also rejected SunSpec’s argument that the patent claims failed because no single entity combined all the relevant system elements. Tigo plausibly alleged that SunSpec and the laboratories functioned as a single responsible entity because SunSpec controlled the testing process.

Tigo further alleged that a device simulating a solar module was equivalent to an actual solar module under the doctrine of equivalents. The court found those allegations sufficient at the pleading stage. Whether the simulator was actually equivalent, and whether the accused systems ultimately infringed, remained questions for a later stage.

The court also found plausible allegations of direct infringement by at least some SunSpec members and their customers. Tigo pointed to a Solectric offer for a solar system represented as complying with SunSpec’s rapid-shutdown certification and to an SMA video describing installation of a certified rapid-shutdown device. The court treated SunSpec’s challenges to the completeness, credibility, and meaning of those materials as factual issues for discovery rather than grounds for dismissal.

Induced Infringement

Tigo separately alleged induced infringement under 35 U.S.C. § 271(b). That theory requires a plausible underlying act of direct infringement, affirmative acts that encouraged another party to infringe, and knowledge that the encouraged acts constituted infringement.

For the laboratories, Tigo alleged that it notified SunSpec beginning in 2017 that products following SunSpec’s specifications infringed the ’321 Patent. Tigo also alleged that it later sent SunSpec a letter through counsel, offered to license the patent, and asked SunSpec to notify members that a license was needed. According to Tigo, SunSpec instead continued directing laboratory testing, published material disputing Tigo’s patent claims, and promoted use of the specifications. The court found these allegations sufficient to plausibly allege knowledge and intentional encouragement.

For SunSpec’s members and their customers, Tigo alleged that SunSpec developed and published the specifications intending that they be used in solar systems, promoted them as a way to satisfy rapid-shutdown requirements, and encouraged members and others to use compliant systems. The court found those allegations sufficient to plausibly allege both direct infringement by members or customers and SunSpec’s knowing inducement of that infringement. The court rejected SunSpec’s argument that it could not induce customers or installers because it had no direct relationship with them.

Disposition

The court denied SunSpec’s motion to dismiss Tigo’s direct and induced patent-infringement claims. The court did not make a final finding that SunSpec or any other entity infringed the patent. It held only that Tigo’s allegations were plausible enough for the claims to continue into discovery and later proceedings.

The court also granted SunSpec’s unopposed request for judicial notice of four SunSpec rapid-shutdown certificates. The court took notice of the certificates’ existence, but not the truth of the matters stated in them.