Fronius Primo (Online) - Manual (Page 18)

16
Inverter DC con-
nection The inverter is designed to be connected
and used exclusively in conjunction with
ungrounded solar modules.
The solar modules may either be grounded
on the positive or negative pole.
IMPORTANT! Check the polarity and voltage of the solar module strings.
The difference between the individual solar module strings must not exceed 10 V.
If DC cables are laid over the shaft of the
DC main switch or across the connection
block of the DC main switch, they may be
damaged when the inverter is swung in, or
they may even prevent the inverter from
being swung in.
IMPORTANT! Do not lay DC cables over
the shaft of the DC main switch or across
the connection block of the DC main switch!
NOTE! Only break out as many target break points as the number of cables that
are provided (e.g. if there are two DC cables, then break out two recesses).