18
7.4 PV CONNECTION
Cable Requirements*:
Minimum Insulator Voltage
10 AWG – 6 AWG (Max.) (6 mm
2
2
*Consult installer to ensure that appropriate cable sizing is used due to various factors such as
distance and operating voltage and amperage.
PV Input Data Description Parameter
DC Input Voltage Range
Range required for the unit to operate up to max.
input
100 – 600VDC
Unit Startup Voltage Voltage needed for the unit to turn on 140VDC
Load Output Minimum Voltage
Min. voltage needed to output power on the load
side
>140VDC
MPPT Operating Voltage Range
Range where the MPPT can track
Full Power MPPT Voltage Range Range where the MPPT operates at max. capacity 230 – 500VDC
Nominal MPPT Voltage Voltage at which MPPT will operate most optimally 360VDC
Max. Utilized Solar Power
Wattage the unit can utilize from the solar array
Rec. Max. Solar Input
Suggested PV power input to the device to utilize
the full 21kw of PV
24kW
!
• Verify the lowest ambient temperature of the installation location. The rated
VOC on the solar module nameplate is obtained at STC (77°F/25°C). As the
ambient temperature drops, the solar module VOC increases. Ensure the
maximum solar string voltage, corrected at the lowest temperature, does not
exceed the inverter’s maximum input voltage of 600V.
• It is recommended to install a DC circuit breaker or disconnect switch between
inverter and PV modules. The specifications of the DC breaker is
600VDC/32A. It's very important for system safety and efficient operation to
use proper cable for PV module connection as shown in the table above.
• When connecting multiple inverters in parallel, a single string cannot be
shared between inverters. Each inverter must be connected to its own string.
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