15
EN
Notes regarding DC connection
General com-
ments regarding
solar modules
To enable suitable solar modules to be chosen and to use the inverter as efficiently as pos-
sible, it is important to bear the following points in mind:
- If insolation is constant and the temperature is falling, the open circuit voltage of the
solar modules will increase.
- The temperature coefficients on the solar modules data sheet must be observed
- More exact values for dimensioning the solar modules can be provided by suitable cal-
culation programs, like the Fronius Solar.configurator (which can be downloaded from
www.fronius.com).
NOTE!
Before connecting up the solar modules, check that the voltage for the solar mod-
ules specified by the manufacturer corresponds to the actual measured voltage.
The solar module manufacturer's safety instructions and regulations regarding solar mod-
ule grounding must be observed.
DC terminals
Max. cross-section of each DC cable:
16 mm²
Min. cross-section of each DC cable:
2.5 mm²
The DC cables can be connected to the DC
terminals without ferrules.
NOTE!
To ensure effective strain relief of the
solar module strings, only use cables
with identical cross-sections.
IMPORTANT! When using ferrules for DC cables with a cross-section of 16 mm², the fer-
rules must be crimped with a right-angled cross-section.
The use of ferrules with insulating collars is only permitted up to a max. cable cross-section
of 10 mm².
min. 2,5 mm² - max. 16 mm²
DC= (+)
DC= (-)
MPPT1
MPPT2
D1
D2
D1
D1
D1
D3
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