Tigo Energy 11.4 kW 200A ATS-Compatible String Inverter TSI-11.4K-US

The Tigo Energy EI Inverter 11.4 kW (Compatible with 200A ATS) is a hybrid, grid-tied inverter with battery support that coordinates PV production, self-consumption, and backup power. With up to 200% DC oversizing, four MPPTs, and a weatherproof NEMA 4X/IP65 enclosure, it’s built for high yield and dependable operation—ideal for new PV storage installs or upgrades using Tigo TS4 MLPE and EI/GO batteries.

• 11.4 kW nominal AC power (240 V) with 48 A max AC output current (grid-tied)
• Backup-ready: up to 75 A max backup output current with GO Battery (300 ms duration); 56.7 A with EI Battery
• Up to 22.8 kW recommended PV input (STC) with 4 MPPTs; 2 strings per MPPT
• 600 V max DC voltage with wide 80–550 V MPPT range and 220–500 V full-load window for flexible stringing
• Runs on the Tigo Energy Intelligence platform for module-level monitoring, optimization, and compliant rapid shutdown (NEC 690.12)
• Built-in Wi-Fi (optional 4G) with fast, app-based commissioning
• Listed to UL 1741 / IEEE 1547 and more; includes revenue-grade metering (ANSI C12.20)

Smart control for solar storage

Pair with Tigo EI or GO batteries to store excess PV and power essential circuits during outages. The inverter automatically manages production and load priorities while remaining grid-compliant.

Flexible DC architecture, higher yield

Four independent MPPTs, generous string current limits, and a 2:1 DC/AC ratio let you combine varied roof planes, long strings, or future array expansions without sacrificing performance.

Outdoor-ready and installer-friendly

The NEMA 4X/IP65 chassis is built for the elements. Spacious wiring, quick start-up, and integrated rapid shutdown help reduce labor time.

Works with 200A ATS

This 11.4 kW model is compatible with 200 A automatic transfer switches for clean, code-compliant backup integrations and seamless source switching.

Size

15.8" × 7.4" × 25.2"

Weight

45.2 lb

Warranty

152 months