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WARNING! An electrical shock can be fatal. Danger from grid
voltage and DC voltage from solar modules.
- The connection area should only be opened by a licensed
electrician.
- The separate power stage set area should only be discon-
nected from the connection area after first being discon-
nected from the grid power.
- The separate power stage set area should only be opened
by Fronius-trained service personnel.
Never work with live wires! Prior to all connection work, make
sure that the AC and DC wires are not charged.
The DC main switch is only used to switch off power to the
power stage set. When the DC main switch is turned off, the
connection area is still energized.
Connecting Solar Module Strings to the Fronius
IG Plus (DC)
In order to select suitable solar modules and get the most efficient use out
of the Fronius IG Plus, please note the following points:
- The open circuit voltage increases when temperature decreases
(assuming constant irradiance of 1000 W/m²). The inverter open-
circuit voltage should never rise above 600 Volts.
Whenever the open-circuit voltage of the solar modules exceeds 600
Volts, the Fronius IG Plus unit may be damaged, and all warranty
rights will become null and void.
- More exact data for sizing the solar array for the particular location
can be obtained using calculation tools such as the Fronius Configura-
tion Tool (available on http://www.fronius-usa.com).
- See NEC table 690.7 for the appropriate code-related voltage adjust-
ment factor for crystalline silicon modules, or use the manufacturer’s
specified voltage coefficient.
General Infor-
mation About
Solar Modules
Safety
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