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Build a flexible residential solar and energy-storage system around the Tigo Energy TSI-11.4K-US EI Hybrid Solar Inverter.
Delivering 11.4kW of single-phase AC output, the TSI-11.4K-US serves as the intelligent center of the Tigo Energy Intelligence (EI) ecosystem, managing solar generation while providing a path to compatible Tigo battery storage and backup-power configurations.
With up to 200% DC oversizing, multiple MPPTs, a low 50V startup voltage, integrated revenue-grade metering, Wi-Fi and Ethernet connectivity, and a NEMA 4X enclosure, the inverter gives solar professionals a flexible platform for modern residential energy systems.
The TSI-11.4K-US provides 11.4kW AC output in a single-phase hybrid inverter platform.
Use it as the foundation of a grid-connected solar installation or integrate compatible components from the Tigo EI ecosystem to build a more comprehensive solar-plus-storage system.
The hybrid architecture gives homeowners the ability to plan around today's solar needs while maintaining a pathway toward compatible battery storage.
Solar-array design doesn't always need to match inverter AC output one-for-one.
The Tigo EI inverter supports a DC/AC ratio up to 2:1, allowing up to 200% DC oversizing where system design and applicable requirements permit.
That additional flexibility gives qualified solar designers more options when sizing arrays around site conditions, solar production patterns, energy consumption, and storage objectives.
Not every roof faces one direction.
Different roof planes, orientations, and array configurations can create additional design challenges for residential solar systems.
The Tigo TSI-11.4K-US incorporates multiple Maximum Power Point Trackers (MPPTs) to help manage compatible PV array configurations across different input conditions.
This provides greater design flexibility for properties where solar modules may need to be distributed across multiple roof surfaces.
The inverter features a 50V startup voltage, allowing compatible PV configurations to begin inverter operation at a relatively low DC voltage.
Actual daily solar production depends on array design, module specifications, shading, weather, orientation, system configuration, and numerous other factors.
The TSI-11.4K-US incorporates revenue-grade metering, supporting detailed energy measurement within the Tigo EI platform.
This gives homeowners and solar professionals greater visibility into system performance without building the monitoring strategy around a collection of unrelated products.
Stay connected to system information through built-in Wi-Fi and Ethernet communications.
The connected architecture supports Tigo's monitoring and energy-management ecosystem, while optional cellular connectivity may be available for applicable configurations.
The EI inverter is designed to work within Tigo's broader solar ecosystem, including compatible Tigo TS4 module-level power electronics (MLPE).
When appropriately configured with compatible TS4 equipment, systems can incorporate features such as module-level monitoring, optimization, and rapid shutdown functionality, depending on the specific TS4 devices selected.
Importantly, Tigo optimizers are not required simply to operate the inverter.
Systems without module-level equipment can still operate with monitoring functionality appropriate to the installed configuration.
Planning to add battery storage?
The TSI-11.4K-US is designed for integration with compatible Tigo TSB battery equipment.
Supported configurations can incorporate Tigo battery storage to retain solar energy for later use, expanding the system beyond immediate solar production.
Battery quantity and configuration must follow Tigo's compatibility and installation requirements.
A hybrid inverter alone should not be confused with a complete backup-power system.
For supported outage-backup functionality, the Tigo EI system requires the appropriate Tigo battery and automatic transfer equipment.
When properly designed and installed with compatible components, the system can transition from normal grid-connected operation to supported backup operation during a utility outage.
Available backup duration and load capability depend on battery capacity, inverter capacity, household demand, system design, and other installation-specific factors.
The Tigo EI platform incorporates several features designed around modern solar-system safety and control.
Depending on the complete system configuration, features include integrated CCA and RSS functionality, emergency-stop capability, anti-islanding protection, and compatibility with Tigo rapid-shutdown equipment.
Rapid shutdown functionality requires the appropriate compatible module-level equipment and system configuration.
The inverter features a NEMA 4X / IP65-rated enclosure, making it suitable for appropriate indoor or outdoor installation locations when installed according to Tigo requirements.
At approximately 45 lbs., the inverter also maintains a relatively manageable form factor for professional installation.
One of the biggest advantages of the TSI-11.4K-US is that it isn't designed as an isolated component.
It can serve as part of a broader Tigo EI system incorporating:
Solar PV generation
Tigo TS4 module-level electronics
Compatible Tigo TSB battery storage
Tigo automatic transfer equipment
System monitoring
Energy management
Rapid shutdown
Backup-power configurations
Wi-Fi and Ethernet communications
Tigo EI App commissioning and management
11.4kW AC output
Single-phase hybrid inverter
Up to 2:1 DC/AC ratio
Up to 200% DC oversizing
Multiple MPPT architecture
50V startup voltage
Integrated revenue-grade metering
Built-in Wi-Fi
Built-in Ethernet
Optional cellular connectivity for applicable configurations
Tigo TS4 MLPE compatibility
Compatible with Tigo TSB batteries
Backup capable with required compatible Tigo equipment
Integrated CCA and RSS functionality
Emergency Stop capability
NEMA 4X / IP65 enclosure
Approx. 45 lb. inverter weight
Designed for residential solar and storage systems
Brand: Tigo Energy
Model: TSI-11.4K-US EI
Product Type: Hybrid Solar Inverter
AC Output Power: 11.4kW
Phase: Single Phase
Architecture: Transformerless
DC/AC Ratio: Up to 2:1
DC Oversizing: Up to 200%
Startup Voltage: 50V
MPPT: Multiple MPPT Architecture
Communications: Wi-Fi & Ethernet
**Optional
Customer installations & verified reviews
See how Home Outpost Supply customers are putting serious storage, shelter, outdoor cooking, and garage-lift solutions to work at home.
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