Fronius Symo Hybrid 3.0, Installation Instructions Manual, Page: 21 / 40

Note! When designing cable cross-sections, take local regulations into account.
Connection conditions:
1
Carefully clean the oxide layer from the bare end of the cable by scraping it, e.g. with
a knife
IMPORTANT! Do not use brushes, files or emery paper, as the aluminium particles get
trapped and can be transferred to other conductors.
2
Once the oxide layer is removed, rub the end of the cable with a neutral grease,
such as non-acidic and non-alkaline Vaseline
3
Immediately connect the cable end to the terminal
IMPORTANT! Repeat the procedure if the cable has been disconnected and is to be re-
connected.
Do not ground
the poles of the
solar modules The hybrid inverter is a transformerless
device. The individual poles of the solar
modules must not be grounded.
Solar module
strings - check-
ing the polarity
and voltage
CAUTION!
Risk of possible damage to the
inverter!
Check the polarity and voltage of the solar
module strings before making the connec-
tion. The voltage must not exceed the fol-
lowing values:
▶
when installed between 0 and 2000 m
above sea level: 1000 V
▶
when installed between 2001 and
2500 m above sea level: 900 V
▶
when installed between 2501 and
3000 m above sea level: 815 V
▶
when installed between 3001 and
3400 m above sea level: 750 V
Connecting solar
module strings to
the inverter (DC) Only break out as many target break points as there are cables.
21
EN