1. There are basically two possibilities for connecting solar cells and PV modules:
The parallel circuit and the series circuit
The type of interconnection influences how the central electrical variables of the individual components (the current voltage, the current intensity and the power) change in the newly formed component.
2. A single cell can be connected to multiple cells in one module. It is also possible to connect several modules together.
This electronic connection is called interconnection.
http://ncsolarnow.com/services-2/pv-interconnection/ (1.); https://www.e-education.psu.edu/ae868/node/971 (2.)