Enphase IQ Solid-State Transformer — 1.25 MW Distributed GaN Supercluster for 800 VDC Racks

Specifications

Overview

Enphase's IQ Solid-State Transformer is an unusual entrant in AI power: a company known for residential solar microinverters applying the same distributed-conversion philosophy to the data center. Instead of a small number of large power blocks, the IQ SST builds a 1.25 MW rating from 342 hot-swappable power modules - an architecture that trades centralised efficiency engineering for granular redundancy and serviceability.

The technical basis is gallium nitride switching, a proprietary high-frequency transformer and a custom Kestrel control ASIC, giving 98.5% peak efficiency. The target is 800 VDC AI racks, where the medium-voltage to 800 VDC conversion is the first and most loss-sensitive stage of the distribution chain.

The programme was disclosed alongside Enphase's Q1 2026 earnings, placing it in the solid-state transformer integrator category alongside DG Matrix and Amperesand. The engineering claim worth weighing is service granularity: a failed module is a hot-swap event rather than a full block replacement, which matters for availability in a hall where UPS and conversion downtime is measured against GPU-hour cost.

Key Benefits

Granular redundancy: 342 hot-swappable modules replace single points of failure in centralised conversion blocks. High peak efficiency: 98.5% with GaN switching and a high-frequency transformer. Serviceable at rack scale: module-level replacement rather than whole-block swap-outs.

Applications

800 VDC AI racks, medium-voltage AC to 800 VDC conversion, distributed solid-state transformer deployments, high-availability data center power conversion, modular power block architectures.

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