PV connection options
The inverter features either 3 PV inputs (SBSE3.6-50 / SBSE4.0-50 / SBSE5.0-50 / SBSE6.0-50) or 4 PV inputs (SBSE8.0-50 / SBSE9.9-50), depending on the power class. In normal operation, one string can be connected to each PV input.
You have the option of operating the PV inputs A and B for all power classes in parallel, and therefore of connecting more strings to the inverter. With SBSE8.0-50 / SBSE9.9-50, the PV inputs C and D can be connected in parallel in addition. It is important to note that the maximum short-circuit current per input and for all inputs combined must still be observed. By connecting 2 inputs in parallel, twice the value of the maximum short-circuit current per input can be achieved. This can result in PV modules no longer being able to be connected to the remaining inputs as the maximum short-circuit current for all inputs combined has already been utilized.
Use of Y adapters for parallel connection of strings
The Y adapters must not be used to interrupt the DC circuit.
- Do not use the Y adapters in the immediate vicinity of the inverter. The adapters must not be visible or freely accessible.
- In order to interrupt the DC circuit, always disconnect the inverter as described in this document .
Connection overview for normal operation
Connection overview for parallel connection of inputs A/B and C/D