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3 Description
The SolarMax MT series string inverters convert the direct current (DC) of a photovoltaic
generator into grid-compliant alternating current (AC). In this, the current is inverted by
a two-phase, transformerless circuit type. The connection and synchronous feed of the
inverted current into the public power grid are permanently three-phase.
The inverter is operated completely automatically and depends on the power supplied by
the photovoltaic modules. If there is enough power, the inverter starts mains operation
and feeds the existing output into the power grid. If there is not enough power available
from the PV generator, the inverter disconnects from the grid and shuts down.
The two (SolarMax 8MT2 / 10MT2 / 13MT2 / 15MT2) and/or three (SolarMax 13MT3 / 15MT3)
independent MT series MPP trackers adapt to a changed energy supply from the PV gen-
erator with the help of two digital signal processors (DSP) within seconds. The completely
digital current form regulation ensures an outstanding quality of the fed-in current and,
as a result, extremely negligible grid feedback.
During mains operation the integrated grid monitoring permanently checks various pa-
rameters of the AC grid; in this, the set limit values depend on the installation site select-
ed. An integrated AC/DC sensitive leakage current sensor monitors the stray and leakage
currents at the generator end during operation. If values exceed or fall short of the set
limit values, the inverter disconnects from the grid within a pre-set time. Reconnection is
attempted after a defined period of time.
A graphics display with three buttons permits comfortable operation of the inverter and
reading out all important operating data. The integrated data logger allows for recording
the most important operating parameters of the most recent 31 days, 12 months, and
10 years.
The built-in temperature sensor monitors the temperature inside the casing; the heat is
dissipated to the outside by the cooling fins on the back of the inverter. The heat exchange
with the ambient air is actively supported by two controlled fans producing a horizontal
air flow. If the temperature inside the casing becomes excessive, the inverter gradually
reduces its output power.
Summary of Contents for 10MT2
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