SolarEgg
Proprietary ZVS single-stage high-efficiency microinverter
Best for > 400W
SolarEgg is a ZVS Single-Stage cycloconverter adopting an advanced DAB topology, based on a proprietary real-time control architecture for modulation, MPPT, and system management. It bypasses the lossy intermediate conversion stage of traditional inverters.
Redefining microinverter performance by achieving higher efficiency, greater power density, and improved reliability than conventional multi-stage designs by pairing an optimized single-stage DAB architecture with a groundbreaking, real-time control system.
Guaranteed Zero Voltage Switching (ZVS) across all operating conditions provides a flat efficiency curve (always above 94% from light to full load) and minimizes the size of magnetic components and EMI filters. This enabled a world-record average efficiency of 96.1% (CEC) and 95.9% (EU), setting a new benchmark for the solar industry. The result is a new generation of compact, fanless, cost-effective, and ultra-reliable microinverters that maximize energy harvest and reduce system cost.
Key features
- Single-Stage Cycloconverter (AC-DAB) Topology
- EPIC Mixed Signal Controller with Virtual ASIC microarchitecture for running control loops independently from the MCU
- Proprietary MPPT + Regulation Control Algorithm for maximum efficiency and cost effectiveness
- High-frequency switching (up to 1MHz) - Market-Leading GaN Power Stage
- Integrated MPPT & Burst Mode
Typical applications
Best suited for high-power DC/AC
Working principle
The SolarEgg technology revolutionizes power conversion using a single-stage AC-Dual-Active-Bridge (AC-DAB) topology. On the primary side, a Full Bridge that converts the DC input from a solar panel or battery into a high-frequency waveform. This is stepped up by a planer transformer and directly synthesized into grid-compliant AC power by a secondary-side half-bridge cycloconverter built with bidirectional GaN switches.
The entire process is orchestrated by our EPIC controller, which uses a proprietary Variable-Frequency Modulation strategy. This algorithm continuously adjusts phase shift and frequency to minimize performance-killing reactive power and ensure ZVS, achieving ultra-high efficiency and clean power output in a way that is unattainable by conventional fixed-frequency or multi-stage converters.
Key benefits
Industry-Leading Efficiency
World-record average efficiency of 96.1% (CEC) and 95.9% (EU) with a flat efficiency curve (always above 94% from light to full load), setting a new benchmark and ensuring maximum energy harvest.Guaranteed Zero Voltage Switching (ZVS)
Soft-switching across all load conditions dramatically reduces power losses, heat, and component stress.Maximum Energy Harvest
A proprietary control architecture with integrated Maximum Power Point Tracking (MPPT) and high efficiency across all loads ensures the maximum possible power is extracted from the solar panel.Exceptional Power Density
The synergy of Eggtronic controller and GaN technology ensures high efficiency for compact, fanless designs cooled by natural convection, ensuring silent, high-reliability operation.Reduced BOM & System Cost
The highly integrated single-stage design significantly reduces components count, and the high operating frequency reduces size of components, simplifying manufacturing, and lowering overall system cost.Superior Power Quality
Advanced control delivers exceptionally low grid current distortion (<3% THD), easily meeting stringent utility standards.Available configurations
Controllers
EPIC2ACO01
DC/AC DAB Cycloconverter Digital Controller
- Integrated Single-Stage DAB Cycloconverter
- Proprietary Variable Frequency Modulation
- Integrated high-speed MPPT algorithm
- QFN40
- 6mm x 6mm
- 40 pins
Reference Designs
Features
- ZVS Guaranteed - Proprietary Variable Frequency Modulation - Integrated MPPT
- Bidirectional GaN switches
- Peak efficiency 96.3%