Solar Photovoltaic
PV Modules
An individual solar cell can only produce a small amount of power (typically 1 to 2 watts). To increase the electrical output, solar cells are combined in series to form PV modules. PV modules come in different forms such as the usual framed PV panels, PV glass units, flexible PV modules, PV roof tiles. Typical ratings of standard modules are from 250W to 320W, with higher ratings also available in the market. There are also many small PV modules designed for toys, calculators, etc.
Above: Framed PV panels
Above: PV glass units
Above: Flexible PV module
Above: PV roof tile (Source: Premier Power Renewable Energy)
In actual systems, modules are connected in series to form "PV strings", and strings are combined in parallel to form a "PV array" (or "PV generator").