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3.2.1 Safety functions
In order to ensure a high safety standard, SolarMax inverters feature integrated fault
current monitoring on the DC side. If a fault current ows into the earth, the fault current
monitoring system detects the differential current and interrupts the mains operation.
Accidental human contact triggers a safety mechanism in the fault current monitoring
system which shuts down the device. Thereby preventing electric shock.
3.2.2 Control functions
SolarMax features state-of-the-art measuring and control electronics. A digital signal
processor (DSP) generates the PWM signals and offers the following inverter control
functions:
■ Automatic on/off-switching
■ Grid monitoring (overvoltage, undervoltage, mains frequency, detection of stand-
alone operation)
■ Mains synchronisation and sinusoidal current control
■ Maximum power point tracking (MPPT, searching for the optimum operating point)
■ Output limitation for oversized PV generators
■ Input and output current limitation
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