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Electrical Connection
7.4 PV Connection
DANGER!
• High DC voltage will be generated by PV modules when exposed to sunlight. Death
or lethal injuries will occur due to electric shock.
• Make sure the DC switch and AC breaker are disconencted from the inverter before
connection
.
• Make sure that the PV module output is well insulated to ground.
CAUTION!
• Power is fed from more than one source and more than one live circuit.
Requirements for PV connection
• Open circuit voltage and working voltage
»
The open circuit voltage of the module array should be less than the
maximum PV input voltage (1000 V) by the inverter. Otherwise the inverter
may be damaged.
»
The working voltage should be within the MPPT voltage range (180-950
V). Otherwise, the inverter will prompt PV Volt Fault. Consider the impact
of low temperature on the voltage of the photovoltaic panels, as lower
temperatures tend to result in higher voltages.
• PV module
»
The PV modules within the same MPPT channel are of the same brand.
Additionally, the strings within the same channel should have identical
quantities, and be aligned and tilted identically.
»
The positive or negative pole of the PV modules is not grounded.
»
The positive cables of the PV modules must be connected with positive DC
connectors.
»
The negative cables of the PV modeules must be connected with negative
DC connectors.
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