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.