Tigo and Weco Forge Alliance to Simplify Solar System Design

MONTEVARCHI, Italy – January 16, 2026 – In a move set to streamline the design and enhance the performance of residential solar installations, Tigo Energy, Inc. (NASDAQ: TYGO) and Weco S.r.l. have announced a new certificate of compatibility. The certification officially documents the seamless interoperability between Tigo's Flex MLPE (Module Level Power Electronics) products and a range of Weco's single-phase and three-phase hybrid solar inverters.

This partnership is designed to offer solar professionals greater flexibility and confidence when designing PV systems, particularly for complex residential rooftops. By ensuring that Tigo's TS4-A and TS4-X optimizers work harmoniously with Weco's inverters, the collaboration aims to create a more efficient, intelligent, and valuable energy ecosystem for homeowners.

The Installer's Blueprint for Efficiency

For solar installers and system designers, the announcement represents a significant reduction in complexity and a major boost in operational efficiency. The core of the collaboration lies in the proven synergy between Tigo's MLPE technology and Weco's advanced hybrid inverters. MLPE devices, such as Tigo's optimizers, are critical for maximizing energy harvest from solar arrays, especially under challenging, real-world conditions.

Installations are rarely perfect. Partial shading from trees, chimneys, or adjacent buildings, as well as module mismatch from manufacturing tolerances or degradation over time, can severely limit the output of a standard solar array. Without optimization, the lowest-performing panel in a string can drag down the performance of all other panels. Tigo's technology isolates each panel, allowing it to produce its maximum possible power independently. Independent research has shown that MLPE can reduce energy losses from partial shading by as much as 35% and boost a system's annual output by over 17% in shaded conditions.

This certified compatibility eliminates the guesswork and technical risk for installers. “The compatibility between our inverter solutions and Tigo optimizers represents a significant step forward for the entire industry, and confirms our commitment to simplifying the work of solar professionals,” said Federico Cusumano, R&D manager at Weco S.r.l. “Thanks to this certification, designers and installers can now benefit from greater sizing flexibility to optimize system configurations according to the precise requirements of each customer site.”

This flexibility allows installers to utilize more of a customer's roof space, designing systems that are not constrained by uniform orientation or perfect sun exposure. The assurance of a smooth commissioning process and predictable system behavior, as highlighted by Tigo, means fewer man-hours spent on troubleshooting and more time dedicated to new installations.

Powering the Modern Home Smarter

While the technical details resonate with industry professionals, the tangible benefits for homeowners are substantial. This partnership directly addresses the desire for more efficient, reliable, and cost-effective home energy solutions. The combination of Tigo's module-level optimization and Weco's hybrid inverters creates a powerful and intelligent residential energy system.

Weco's hybrid inverters are designed to be the hub of a modern home's energy management, seamlessly integrating solar generation, battery storage, and grid interaction. When paired with Tigo's MLPE, the system ensures that the maximum amount of solar energy is generated throughout the day, leading to lower electricity bills and a faster return on investment for the homeowner. The system can produce more power even on cloudy days or on rooftops with complex architectural features, maximizing the value of the solar asset.

Furthermore, Tigo's Flex MLPE platform provides a critical safety feature: module-level rapid shutdown. In the event of an emergency, this function allows first responders to de-energize the solar array at the individual panel level, drastically reducing electrical shock hazards. This code-required safety standard provides homeowners with invaluable peace of mind. The granular, panel-level monitoring also allows both the homeowner and the installer to track system performance in real-time, ensuring any issues with a specific module can be identified and addressed quickly, maintaining peak performance for decades.

A Strategic Move Towards an Open Solar Ecosystem

This announcement is more than just a technical handshake; it reflects a broader strategic trend in the solar industry toward open, interoperable ecosystems. For years, the market has seen a push and pull between proprietary, all-in-one systems and the flexibility of mixing and matching best-in-class components from different manufacturers. This Tigo-Weco alliance is a firm step in the direction of openness and choice.

Tigo Energy has strategically positioned itself as a provider of an open-architecture layer that works with a vast network of inverter manufacturers. This contrasts with more closed ecosystems where optimizers or microinverters are tied to a specific brand of inverter. By validating compatibility with Weco, an innovative Italian manufacturer known for its robust R&D and quality, Tigo reinforces its commitment to this flexible model.

“For Tigo, this announcement is first and foremost about giving installers greater control at the module level without adding complexity to system design,” stated Gal Bauer, senior director of validation, growth, and product management at Tigo Energy. “Certified compatibility with Weco inverters ensures that Tigo Flex MLPE technology can be deployed exactly where it delivers the most value... This is yet another concrete example of how Tigo continues to build an open ecosystem that prioritizes safety, flexibility, and long-term system performance.”

This approach empowers installers to select the ideal inverter for a project's specific needs and budget, without sacrificing the performance and safety benefits of module-level power electronics. For Weco, the partnership expands its market reach and validates its inverters' place within this growing, flexible ecosystem, reinforcing its commitment to delivering integrated and intelligent energy solutions focused on long-term customer value.

To support the rollout, Tigo and Weco will host a joint technical webinar for installers to provide deeper insights into the product portfolios and explore case studies demonstrating the combined technologies. A complete list of Weco inverters certified for use with Tigo MLPE products is now available on the Tigo Energy website, providing a clear path for solar professionals to begin leveraging this powerful combination.