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Photovoltaic Power Optimizer

Architectures based on power optimizers are composed of three main functional blocks connected as shown in the pictures.

  • The power optimizer implements, at the panel level, the DC-DC power conversion with MPPT and the communication capability.
  • The inverter implements the DC-AC power conversion, the communication capability and the connection to the AC grid.
  • The data concentrator collects the data (voltage value, current value, etc.) from all the panels and from the inverter and sends it to a local or remote monitoring and control access point.

Two power optimizer architectures can be identified depending on the output voltage of the DC-DC converter:

  • low-voltage architecture, in each string the power optimizers are connected in series
  • high-voltage architecture, the power optimizers are connected directly in parallel to the main inverter

These architectures have the following benefits:

  • more energy production: the MPPT at panel level maximizes system energy production
  • communication and monitoring capabilities at panel level

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

Design Support

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Technical Documentation

Application Notes

Description Version Size
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AN3392: Designing with the SPV1020, an interleaved boost converter with MPPT algorithm
1.0 5,700 KB
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AN4242: New generation of 650 V SiC diodes
1.1 2,550 KB

Presentations & Training Material

Presentations

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ST products and solutions for solar energy
1.0.0 2,135 KB

Publications and Collaterals

Brochure

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Products and solutions for solar energy
1.0.0 1,318 KB

Magazine

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DC-DC Converter with Embedded MPPT for Photovoltaic Panels
0 KB
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Innovative architectures for solar energy applications: st microinverter system solution
614 KB
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ST MEMS accelerometers to meet new Safety and Security requirements in the PV world
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Conference Paper

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Single Stage Offline LED Driver
204 KB
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