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Solar Inverter Power Stage PCB

2025-10-28

Latest company case about Solar Inverter Power Stage PCB
Case Detail

This project involves the design and manufacturing of a high-power printed circuit board assembly (PCB) for a grid-tied solar inverter. This PCB handles the main power conversion from DC photovoltaic input to AC grid output, incorporating maximum power point tracking (MPPT), DC-AC inversion, and grid synchronization for residential and commercial solar installations.

Key PCB Specifications:
Base Material: High-Tg FR4 with enhanced thermal conductivity and high CTI (Comparative Tracking Index) ≥600V
Layer Stackup: 2-layer construction with 105μm/4 Oz copper on both sides for high-current capability
Copper Weight: 4 Oz on all layers with selective 6 Oz copper for critical current paths
Board Thickness: 2.4 mm, providing mechanical support for heavy through-hole power components
Surface Finish: HASL lead-free with selective ENIG for connector interfaces
Thermal Management: Thermal via arrays under IGBTs and diodes for efficient heat transfer to heatsink
Quality Assurance: 100% high-potential (hipot) testing and thermal imaging under full power conditions

Functional Role:
This PCB enables efficient, reliable solar energy conversion:
Power Conversion: Three-phase IGBT bridge with 600V, 50A rating for 10kW inverter output
MPPT: Dual-channel maximum power point tracking with 99.5% efficiency for optimized energy harvest
Grid Interface: Grid synchronization with low harmonic distortion (<3% THD) and anti-islanding protection
Monitoring: Real-time voltage, current, and power measurement with 0.5% accuracy for performance tracking
Safety: Comprehensive protection including ground fault detection, overcurrent, and over-temperature shutdown