NOTE 1 An inverter is one of a number of components that is included in the term "power conditioner"

a) current control inverter

inverter with an output electric current having a specified sine waveform produced by pulse-width modulated (PWM) control or other similar control system

b) current stiff inverter

inverter having an essentially smooth DC input electric current

c) grid-connected inverter

inverter that is able to operate in parallel with the distribution or transmission system of an electrical utility

NOTE 2 A grid-connected inverter is also known variously as a grid-intertie or a grid-tied inverter

d) grid-dependent inverter

grid-connected inverter that operates only in grid-dependent mode

e) grid-interactive inverter

grid-connected inverter that is able to operate in both stand-alone and parallel modes

NOTE 3 A grid-interactive inverter initiates a grid-parallel mode of operation

f) high frequency link inverter

inverter with a high frequency transformer for electrical isolation between the inverter's input and output circuits

g) module inverter

inverter that is integrated to the output of a single PV module

NOTE 4 A module inverter is usually attached to the rear of a module

NOTE 5 See also "AC module", 3.3.2

h) non-islanding inverter

inverter that ceases to energize an electricity distribution system that is out of the normal operating specifications for voltage and/or frequency

i) stand-alone inverter

inverter that supplies a load not connected to the distribution or transmission system of an electrical utility

NOTE 6 A stand-alone inverter is also known as a "battery-powered inverter"

j) string inverter

inverter that is designed to operate with a single PV string

NOTE 7 The AC output of a string inverter can be connected in parallel to the output of other string inverters

k) transformerless inverter

inverter without any isolation transformer

l) utility frequency link inverter

inverter with a utility frequency transformer for electrical isolation at the inverter output

m) utility interactive inverter

inverter used in parallel with the distribution or transmission system of an electrical utility to supply common loads and that may deliver electricity to that distribution or transmission system

n) voltage control inverter

inverter with an output voltage having a specified sine waveform produced by pulse-width modulated (PWM) control, etc

o) voltage stiff inverter

inverter having an essentially smooth DC input voltage