Technical data

Characteristics of inverters "isolated by a high-frequency transformer"
Advantages and limitations of high frequency isolation technology
Advantages:
 Downward extension of working input voltage range to be able to operate below the peak voltage of
the grid (intrinsic limit of transformerless single stage of the technology).
 Ability to refer to ground one of the poles of the photovoltaic generator as required for some
amorphous or crystalline silicon modules using "all-back contact” technology.
Limitations:
 Efficiency generally lower than that of transformerless
systems and centred on the lower limit of the input voltage
interval. The DC/DC stage usually works only as a level
translator and does not stabilize the working voltage of the
inverter, which in turn is penalized when the input voltage
increases.
 Voltage interval extended downward, but often limited
on the upper end to around 500Vdc. In a trend opposite to
the development of modern modules, modules often
require numerous strings connected in parallel to limit the
Vocmax.
Energy conversion to alternating current