Tigo TS4-A-O Module-level PV Optimizer

Module-level optimizer — Tigo TS4-A-O Module-level PV Optimizer

The Tigo TS4-A-O is an add-on module-level power electronics (MLPE) optimizer that brings smart module functionality to standard PV modules. Designed to boost energy yield and system reliability, the TS4-A-O provides per-module optimization while meeting NEC 2017 and 2020 rapid shutdown requirements and supporting high‑power modules up to 700 W.

Applications and use cases

The TS4-A-O module-level optimizer is suitable for both retrofit upgrades and new PV installations. It is intended for systems where module mismatch, partial shading or multiple orientations reduce string output, and where module-level intelligence or NEC rapid shutdown compliance is required.

• Retrofit optimization for underperforming rooftop or ground‑mounted PV arrays
• Module-level optimization on multi-orientation or partially shaded arrays
• Integration into MLPE architectures to add smart module functionality to standard modules
• Use on residential and commercial PV installations that require NEC 2017 / 2020 rapid shutdown

Key electrical and performance parameters

The TS4-A-O provides the core electrical specifications required for module-level optimization and safe PV operation. Its electrical ratings and connection options make it compatible with modern PV modules while protecting system performance under varying site conditions.

• Supports PV modules up to 700 W nameplate power
• Maximum short-circuit current handling of 15 A, suitable for high-current PV modules
• Absolute maximum input Voc specified at 80 V for the optimizer input
• Standard DC connection options: MC4 and EVO2 compatible
• Built-in 1.2 m output cable length to facilitate module interconnection
• Series / Model: TS4-A-O (Tigo)

Safety, standards and rapid shutdown

The TS4-A-O is engineered to meet modern safety expectations for distributed PV systems. It delivers module-level rapid shutdown capability required by recent electrical codes and reduces PV string-level hazards during maintenance or emergency conditions.

• Complies with NEC 2017 and NEC 2020 rapid shutdown requirements
• Adds module-level safety functionality to otherwise standard PV modules
• Supports safer system commissioning and de‑energization workflows
• Helps isolate underperforming or faulty modules without impacting entire strings

Mechanical design and installation

The TS4-A-O is compact and lightweight for straightforward mounting at the module junction box. Its mechanical footprint and cable length are designed to simplify on‑module installation and connector compatibility across common PV module types.

• Compact form factor: approximately 139.7 mm × 138.4 mm × 22.9 mm
• Lightweight: around 0.52 kg for minimal added load on modules
• 1.2 m output cable for flexible routing to combiner or next module
• Compatible with common DC connectors (MC4 and EVO2) to match industry wiring

Operating benefits and reliability

As an optimization add-on, the TS4-A-O increases overall system energy capture and reliability by enabling module-level control. Installing optimizers at the module level mitigates the effects of mismatch and localized losses, prolongs consistent output from arrays, and brings standard modules closer to smart-module performance.

• Improves array energy yield in mixed-irradiance or mismatch scenarios
• Converts standard PV modules into smart-capable modules for enhanced system visibility when used with compatible monitoring solutions
• Reduces downtime impact by isolating performance issues to individual modules
• Robust add-on design intended for typical PV environmental exposure and long-term field operation