Grid-Connected Small-Scale Installation
In a small-scale, most likely residential, installation, the pv- module has to be connected to an.
The purpose of an inverter is to
- Change the direct current (DC) output of a solar module alternating current (AC), which is used by all appliances.
- Transform the voltage from the module’s voltage to the voltage required. In small-scale installations, the AC output from the inverter is a 2-phase AC, which is common in households. The inverter output can be connected to the grid via a meter.
Maximum PowerPoint Tracker (MPP)
As described, the MPP tracker ensures that the module operates at its maximum power point at all times. Most invert er also include the 7 maximum power point tracker (MPP). Where crystalline modules are used, partial shading of the entire roof (for instance caused by the tree or the chimney), the module will only generate as much current as its weakest string. In this instance, e. string should have its own MPP- tracker, resulting in efficiency gains of up to 8% according to Stecca.
Some inverters may also vide surge protection. However, this may not be enough if the wires between the solar module and the inverter are longer than 1Om, when additional surge protection devices ought to be considered.