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The most common types of solar inverters are string and central inverters, used as power conversion systems for grid-tie solar applications.

They comprise a DC-DC conversion stage, to adapt voltage levels and implement the Maximum Power Point Tracking (MPPT) function, to maximize energy transfer from the panel and a DC-AC conversion stage to correctly shape current and voltage waveforms transferred to the AC grid. A solar inverter has an anti-islanding function that guarantees safety in case of AC disconnection.

With power ranging from a few kilowatts for solar string and multi-string inverters to tens or hundreds of kilowatts for solar central inverter solutions, the trend is to use topologies with very high input voltages (up to 1500V).

We offer a broad range of silicon-carbide (SiC) power MOSFETs - with the industry's highest operating junction temperature of 200 °C - and trench-gate field-stop IGBTs, that can be also combined into our high-efficiency ACEPACK power modules. Together with galvanically-isolated gate drivers and high-performance STM32 microcontrollers, we enable engineers to design high-efficiency string and central solar inverters. In addition we have a range of wireless and wired connectivity solutions.

Solar inverter block diagram

solar inverter block diagram
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Technical Documentation

    • Description Version Size Action
      AN1768
      ADMISSIBLE AVALANCHE POWER OF SCHOTTKY DIODES
      1.1
      46.82 KB
      PDF
      AN2025
      CONVERTER IMPROVEMENT USING SCHOTTKY RECTIFIER AVALANCHE SPECIFICATION
      1.1
      147.59 KB
      PDF
      AN604
      Calculation of conduction losses in a power rectifier
      3.2
      137.74 KB
      PDF
      AN4021
      Calculation of reverse losses in a power diode
      1.0
      120.47 KB
      PDF
      AN4653
      Cycling endurance and data retention of high density EEPROM based on CMOS F8H process
      1.0
      267.34 KB
      PDF
      AN3432
      How to choose a bypass diode for silicon panel junction box
      1.0
      290.27 KB
      PDF
      AN4671
      How to fine tune your SiC MOSFET gate driver to minimize losses
      1.1
      555.54 KB
      PDF
      AN4242
      New generation of 650 V SiC diodes
      2.0
      4.75 MB
      PDF
      AN5046
      Printed circuit board assembly recommendations for STMicroelectronics PowerFLAT packages
      4.0
      4.82 MB
      PDF
      AN5088
      Rectifiers thermal management, handling and mounting recommendations
      2.0
      2.32 MB
      PDF
      AN5336
      ST8500 host interface driver
      1.0
      978.47 KB
      PDF
      AN3095
      STEVAL-ISV002V1, STEVAL-ISV002V2 3 kW grid-connected PV system, based on the STM32F103xx
      3.0
      3.59 MB
      PDF
      AN1768

      ADMISSIBLE AVALANCHE POWER OF SCHOTTKY DIODES

      AN2025

      CONVERTER IMPROVEMENT USING SCHOTTKY RECTIFIER AVALANCHE SPECIFICATION

      AN604

      Calculation of conduction losses in a power rectifier

      AN4021

      Calculation of reverse losses in a power diode

      AN4653

      Cycling endurance and data retention of high density EEPROM based on CMOS F8H process

      AN3432

      How to choose a bypass diode for silicon panel junction box

      AN4671

      How to fine tune your SiC MOSFET gate driver to minimize losses

      AN4242

      New generation of 650 V SiC diodes

      AN5046

      Printed circuit board assembly recommendations for STMicroelectronics PowerFLAT packages

      AN5088

      Rectifiers thermal management, handling and mounting recommendations

      AN5336

      ST8500 host interface driver

      AN3095

      STEVAL-ISV002V1, STEVAL-ISV002V2 3 kW grid-connected PV system, based on the STM32F103xx

    • Description Version Size Action
      DN0010
      Adapting ST power line modem evaluation boards to communicate over a DC bus
      1.2
      404.54 KB
      PDF
      DN0010

      Adapting ST power line modem evaluation boards to communicate over a DC bus

Presentations & Training Material

    • Description Version Size Action
      ACEPACK™ overview 1.1
      3.32 MB
      PDF
      EEPROM 2 Mbit highest density memories 1.0
      2.49 MB
      PDF
      ST PowerStudio overview 1.0
      1.81 MB
      PDF

      ACEPACK™ overview

      EEPROM 2 Mbit highest density memories

      ST PowerStudio overview

Publications and Collaterals

    • Description Version Size Action
      1200V SiC diodes, 2 to 40 A in surface-mount and through-hole packages 1.0
      748.77 KB
      PDF
      400/650 V MDmesh™ DM2: ST’s new MOSFET series with integrated fast-recovery body diode 1.0
      342.97 KB
      PDF
      650V HB series IGBTs; Innovative 4-lead package 1.0
      1.67 MB
      PDF
      ACEPACK™: Adaptable, Compact, and Easier Packages Power Modules 1.0
      818.5 KB
      PDF
      HB series 650 V IGBTs; Trench Gate Field-stop High-speed technologies 1.0
      290.2 KB
      PDF
      ST Diodes Finder : the new app for Android and iOS 2.0
      1.46 MB
      PDF
      STGAP1AS - Breakthrough in robustness and flexibility 03.2017
      1.4 MB
      PDF
      SiC MOSFETs: The real breakthrough in high-voltage switching 3.0
      1.52 MB
      PDF
      Trench gate field-stop IGBT 1200V M series 1.0
      1.9 MB
      PDF
      Turnkey PLC chipset for smart-energy infrastructure 10.2017
      775.07 KB
      PDF

      1200V SiC diodes, 2 to 40 A in surface-mount and through-hole packages

      400/650 V MDmesh™ DM2: ST’s new MOSFET series with integrated fast-recovery body diode

      650V HB series IGBTs; Innovative 4-lead package

      ACEPACK™: Adaptable, Compact, and Easier Packages Power Modules

      HB series 650 V IGBTs; Trench Gate Field-stop High-speed technologies

      ST Diodes Finder : the new app for Android and iOS

      STGAP1AS - Breakthrough in robustness and flexibility

      SiC MOSFETs: The real breakthrough in high-voltage switching

      Trench gate field-stop IGBT 1200V M series

      Turnkey PLC chipset for smart-energy infrastructure

    • Description Version Size Action
      EEPROM selection guide 2.0
      843.56 KB
      PDF

      EEPROM selection guide

    • Description Version Size Action
      STM32F3 series - Mainstream 32-bit MCUs 17.09
      2.18 MB
      PDF

      STM32F3 series - Mainstream 32-bit MCUs

Development Tools

    • Part Number

      STM32 and STM8 product finder for mobile devices and desktops

      MOSFET product finder application for Android and iOS

      Diode product finder application for Android and iOS

      IGBT product finder application for Android and iOS

Embedded Software

    • Part Number

      ST PowerStudio dynamic electrothermal simulation software for power devices

MEMS and Sensors

Part number Description
HTS221 Capacitive digital sensor for relative humidity and temperature
IIS2DH 3-axis digital accelerometer, ultra low-power high performance MEMS motion sensor
IIS2MDC High accuracy, ultra-low-power ,3-axis digital output magnetometer
IIS3DHHC High-resolution, high-stability 3-axis digital inclinometer for industrial applications
ISM330DLC iNEMO inertial measurement unit (IMU): 3D accelerometer and 3D gyroscope with digital output for industrial applications
LPS22HB Ultra-compact piezoresistive absolute pressure sensor, 260-1260 hPa, digital output barometer, full-mold, holed LGA package (HLGA)
STLM20 Analog temperature sensor, ultra-low current 2.4 V, high precision
STTS751 2.25 V low-voltage local digital temperature sensor
Part number
Capacitive digital sensor for relative humidity and temperature
3-axis digital accelerometer, ultra low-power high performance MEMS motion sensor
High accuracy, ultra-low-power ,3-axis digital output magnetometer
High-resolution, high-stability 3-axis digital inclinometer for industrial applications
iNEMO inertial measurement unit (IMU): 3D accelerometer and 3D gyroscope with digital output for industrial applications
Ultra-compact piezoresistive absolute pressure sensor, 260-1260 hPa, digital output barometer, full-mold, holed LGA package (HLGA)
Analog temperature sensor, ultra-low current 2.4 V, high precision
2.25 V low-voltage local digital temperature sensor

Power Management

Part number Description
L6491 High voltage high and low-side 4 A gate driver
Part number
High voltage high and low-side 4 A gate driver