Tigo Energy TSI-11.4K-US EI Hybrid Solar Inverter - WiFi/Ethernet

Product Overview

The Tigo Energy TSI-11.4K-US EI Hybrid Inverter is the intelligent core of the Tigo Energy Intelligence (EI) ecosystem. Designed for modern residential and light commercial solar installations, this 11.4kW single-phase hybrid inverter seamlessly manages solar production, energy consumption, and battery storage when paired with Tigo TSB batteries.

With industry-leading DC oversizing (up to 200%), integrated revenue-grade metering, and native compatibility with Tigo TS4 MLPE, the TSI-11.4K-US delivers exceptional flexibility, safety, and performance—all in a lightweight, NEMA 4X (IP65) enclosure built for indoor or outdoor installations.

Key Features & Benefits

• 11.4kW Hybrid Solar Inverter – Storage-ready for future battery expansion
• Up to 200% DC Oversizing – Maximize array design flexibility (2:1 DC/AC ratio)
• Multiple MPPTs (3–4) – Optimized energy harvest across complex roof layouts
• 50V Low Start-Up Voltage – Earlier and longer daily production
• Integrated Revenue-Grade Meter (RGM) – Accurate production and consumption tracking
• Module-Level Monitoring & Rapid Shutdown – When paired with Tigo TS4 MLPE
• Built-in Wi-Fi & Ethernet (optional cellular) – Always-connected energy intelligence
• Fast Commissioning – <10 minutes using the Tigo EI App
• Lightweight Design – Approx. 45 lbs for easier installation
• NEMA 4X / IP65 Rated – Suitable for indoor or outdoor use
• Integrated CCA & RSS – Safety and compliance built in
• Emergency Stop (E-Stop) Button – Enhanced system safety
• Tigo Access Point (TAP) Compatible

Technical Specifications

• AC Output Power: 11.4 kW
• Phase: Single-Phase
• Inverter Type: Transformerless String Inverter
• DC/AC Ratio: Up to 2:1
• MPPTs: 3–4
• Starting Voltage: 50V
• Communications: Ethernet, Wi-Fi, Optional Cellular
• Enclosure Rating: NEMA 4X (IP65)
• Certifications: UL 1741 (CEC Listed)

Battery & System Compatibility

• Compatible exclusively with Tigo TSB Batteries
• Supports 1, 2, or 4 batteries per inverter
• One inverter per battery bank
• Works with or without optimizers or batteries
• Parallel inverter operation supported (battery limits apply)

Grid-Tied, Hybrid & Backup Ready

• Net Metering Compatible
• Anti-Islanding Protection – No export during grid outages
• Backup Power Capable when paired with Tigo ATS + Tigo Battery
• Supports off-grid configurations (internet connection required for full warranty)

Frequently Asked Questions

1. Is this inverter compatible with net metering?
   Yes. Net metering is utility-tracked and fully supported, with monitoring available via the Tigo portal.
2. Can it operate during a grid outage?
   Yes, when paired with a Tigo ATS and Tigo Lithium Battery.
3. Do I need Tigo optimizers to use this inverter?
   No. The inverter works with or without optimizers. Without optimizers, monitoring is at the string level.
4. Can I use third-party batteries?
   No. Only Tigo TSB batteries are supported.
5. Is rapid shutdown included?
   Yes, when paired with Tigo TS4 MLPE.

Ideal For

• Residential solar + storage systems
• Homeowners planning future battery upgrades
• Installers seeking fast commissioning and flexible design
• Projects requiring module-level monitoring and rapid shutdown compliance

Why Choose Tigo Energy?

Tigo is a global leader in solar MLPE, monitoring, and energy intelligence, trusted by installers worldwide for reliability, safety, and system-level optimization.

EI Inverter 11.4kW Spec Sheet: Download

TSB-10-US Battery Quick Start Guide: Download

EI Inverter Quick Start Guide: Download

EI Inverter/Battery Manual: Download