Now in advanced development
IQ Solid-State Transformer
One power module. Multiple products. Intelligent power conversion for every AI data center.
THE ENPHASE ADVANTAGE
One power module. A range of SSTs.
The same 4 kW power module will power every product, delivering architectural flexibility without sacrificing manufacturing scale.
SST RACK capacity
Up to 5 MW
SYSTEM EFFICIENCY
>98.5%
GRID & LOAD RESPONSE
Sub-ms
Achievable Uptime
Five 9s
SYSTEM ARCHITECTURE
Two use cases. One outcome.
Enphase IQ SST will support two AI data center power architectures. Deploy local energy storage when your design requires it, or eliminate it entirely by pairing a centralized Battery Energy Storage System (BESS) with the Enphase IQ Solid-State Transformer platform.
DC/DC WITH LOCAL ENERGY STORAGE
Designed for operators that prefer energy storage at or near the load.
DC/DC converts 800 VDC to 1000–1500 VDC
With LV batteries deployed near compute infrastructure
Simplifies integration with localized storage systems
NO LOCAL ENERGY STORAGE
Enphase's differentiated architecture couples a centralized BESS with IQ SST.
Centralized BESS manages energy fluctuations
Without LV batteries within the AI white space
Reduced maintenance and operational complexity
The building block of IQ SST
Explore the technology and design behind every module.
The unit features a potted, all-plastic enclosure and measures 600 mm × 200 mm × 40 mm. Its compact form factor supports the high module count of the IQ SST’s distributed architecture and enables module-level serviceability.
The IQ SST power module uses a single-stage power conversion design with a high-frequency transformer. It delivers 4 kW of continuous power and achieves over 98.5% peak efficiency, with high-frequency operation above 250 kHz. Soft-switching enables low EMI and fast response. The module targets 500 DPPM for high reliability.
Heart of the Enphase power module
Kestrel and GaN together eliminate the complexity that costs efficiency and introduces failure points. That’s why the IQ SST is designed to reach 98.5% peak efficiency, respond in under a millisecond, and support a 10-year limited warranty.
CONTROL
Kestrel ASIC
At the core of the control system is the Kestrel ASIC—the chip that powers the entire platform. This 5th-generation, custom 22 nm controller powers the single-stage converter with a multi-core software architecture that integrates communications, security, and functional safety. It also enables tandem operation over a fiber-optic interface, purpose-built for IQ SST, ensuring synchronized performance and high-speed coordination across the system.
POWER STAGE
GaN bi-directional switch
The power stage is designed around a GaN bi-directional switch engineered for high performance at low voltage, where precision and reliability are critical. Based on GaN HEMT technology—already proven in IQ9 Microinverters—it uses low-voltage (<1 kV), widely available components, eliminating the need for rare and costly high-voltage SiC devices. The result is a highly efficient single-stage design that delivers fast switching, low EMI, and improved overall system performance.
Why IQ SST
Rearchitecting AI power,
the Enphase advantage
Every design choice, from single-stage conversion to shields-as-conductors, ladders up to six defensible advantages.
Reliability
Single-stage microinverter design with 10% redundancy across hundreds of power modules per rack. Very low unit failure rate (500 DPPM). Automated high-volume manufacturing. Five 9s reliability achievable. 10-year limited warranty.
Performance
Predictive control in Kestrel ASIC. High-frequency design (250-500 kHz). 98.5% system efficiency. Support for AGF (LVRT etc.).
Manufacturing cost
Single-stage design with soft switching. Standard PCBA, potted. COTS components. Delta connected—fewer components, simpler wiring, low EMI. Automated manufacturing.
Supply chain
U.S. based manufacturing. FEOC-compliant supply chain. Easier product availability.
O&M
Micros plug into a dual-sided backplane. Only the LV side is accessible. Hot-swappable with a cobot. No specialized technician needed for service.
Experience
89 million microinverters shipped. 2.5 GWh of storage shipped. 9ᵗʰ generation microinverter and 5ᵗʰ generation ASIC. We will deliver what we promise.
Modular Architecture
Scalable system
One architecture that scales up to 5 MW deployments.
Disclaimer: IQ SST and system currently under development. Specifications and performance subject to change.
