Power Optimizer

From Microinverter

What is PhotoVoltaic microinverter

• A DC-AC inverter in the power-range of 250W

• Connected: one per panel

• PV = PhotoVoltaic
• Synchronized to Frequency, Phase, Amplitude, of the Grid.

This way they can be connected in Parallel without connection between them and be

De-centralized

• Presentation June2011: ST products and solutions for solar energy goto page 26

Why

• Get the technology to synchronize parallel inverters
• Use STM32 on inverters
• Minimize BOM cost for small inverter
• Small design

Status

Technology Evaluation

Data

STM32F103ZE is used in all new STM SOLAR and INVERTER reference designs

Links

• Chinese product with good description involar MA250
  
  

• Microchip application note AN1338 Grid-Connected Solar Microinverter Reference Design Using a dsPIC® Digital Signal Controller
  
• Microchip web seminar Grid-Connected Solar Microinverter Reference Design
  
• Microchip Grid-Connected Solar Micro Inverter Reference Design page with downloads
  
  

• EDN article Microinverters and power optimizers: Power conversion migrates down to the PV panel
  
  

• National SolarMagic

Power Optimizer

STM

• SPV1020
• Interleaved DC-DC boost converter with built-in MPPT algorithm

SPV1020 product page

STM SPV1020 datasheet

digikey NOSToCK price $15

• Triple STEVAL-ISV008V1 300 W PV converter demonstration board to be integrated into a photovoltaic pa nel based on the SPV1020

digikey price $129

• Single STEVAL-ISV009V1 300 W photovoltaic converter demonstration board based on the SPV1020

Digikey NO-STOCK price $92

NXP

• nxp-ic-enables-up-to-98-percent-efficient-power-extraction-in-solar-pv-applications
• MPT612 product page

MPT612 DIGIKEY $10

• AN10936 Photovoltaic MPPT battery charge controller using the MPT612 IC reference board

digikey price $193