ST Life.augmented

Photovoltaic String and Central Inverter

The string and central inverter architecture represents the traditional grid-connected photovoltaic system. It is composed of three main functional blocks connected as shown in the picture.

  • The junction box, present in each solar panel, implements the important bypass functionality.
  • The string combiner box implements the protection and monitoring of the strings.
  • The inverter implements the power conversion stages (DC-DC with MPPT and DC-AC), the communication capability and the connection to the AC grid.

The block diagram will help you make the right choice for each functional block from a wide range of recommended products.

Design Support


Technical Documentation

Application Notes

Description Version Size
AN3095: STEVAL-ISV002V1, STEVAL-ISV002V2 3 kW grid-connected PV system, based on the STM32F103xx
3.0 3,676 KB
AN4242: New generation of 650 V SiC diodes
1.2 2,463 KB

Presentations & Training Material


Description Version Size
ST products and solutions for solar energy
5.1 2,135 KB

Publications and Collaterals


Description Version Size
Products and solutions for solar energy
1.0 1,318 KB


Description Version Size
Innovative architectures for solar energy applications: st microinverter system solution
1.0 614 KB