This list of terms describes components and systems involved in a solar power setup connected to the electrical grid.

 This list of terms describes components and systems involved in a solar power setup connected to the electrical grid. A solar panel converts sunlight into electricity, which is then processed by a string inverter to make it usable by the electrical grid. The electricity then flows through an LT panel (Low Tension panel) to a substation, where it may be transformed to higher voltages (HT) and then finally connected to the external grid. The IDT likely refers to an Inverter Disconnect Termination device, which is a safety feature. 

Here's a more detailed breakdown:

Solar Panel:

A photovoltaic (PV) panel that generates direct current (DC) electricity when exposed to sunlight. 

String Inverter:

An electrical device that converts the DC electricity from multiple solar panels (connected in series, forming a "string") into alternating current (AC) electricity, which is compatible with the electrical grid. 

LT Panel (Low Tension Panel):

An electrical panel that distributes and manages electricity at lower voltages (typically less than 1000V) within a facility or system. 

IDT (Inverter Disconnect Termination):

A safety mechanism that allows for the quick disconnection of the solar panel array from the inverter, often used for maintenance or in emergency situations. 

HT Panel (High Tension Panel):

An electrical panel that manages electricity at higher voltages (typically above 1000V). 

Substation:

A facility that transforms voltage levels, usually stepping up voltage for transmission over long distances (HT) and then stepping it down for local distribution (LT). 

External Grid:

The main electrical grid that provides power to a large area, and to which the solar power system is connected.