Fronius 1.5-1, Installation Instructions Manual

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NOTE!
To ground solar module frames or mounts, you must observe both the relevant
instructions from the solar module manufacturer and national guidelines.
General Inform-
ation about Solar
Modules In order to select suitable solar modules and get the most efficient use out of
the inverter, please note the following points:
- The open circuit voltage of the solar modules increases as the temperature
decreases (assuming constant irradiance). The open circuit voltage must not
exceed the following values depending on the altitude:
0–6561 ft. (0–2000 m) ... UDC max = 550 V
> 6561–8202 ft. (> 2000–2500 m) ... UDC max = 540 V
> 8202–9842 ft. (> 2500–3000 m) ... UDC max = 480 V
> 9842 –11482 ft. (> 3000–3500 m) ... UDC max = 430 V
Open circuit voltage which exceeds the given values will damage the inverter
and void all warranty entitlements.
- Note the temperature coefficients in the solar module data sheet.
- More exact data for sizing the solar modules can be obtained using calcula-
tion tools such as the Fronius Configuration Tool (available at http://
www.solarweb.com).
- See NEC table 690.7 for the appropriate code-related voltage adjustment
factor for crystalline silicon modules, or use the manufacturer’s specified
voltage coefficient.
NOTE!
Before connecting solar modules, make sure that the voltage specified by the
manufacturer corresponds to the actual measured voltage.
Note the safety instructions and specifications of the solar module manufacturer
regarding solar module grounding.
Inverter DC
Connection IMPORTANT! Check the polarity and voltage of the solar module strings. The
difference between the individual solar module strings may not exceed 10 V.
If DC cables are laid over the shaft of
the DC main switch, or across the DC
main switch connection block, they
could be damaged when the inverter
swivels in, or the inverter could be pre-
vented from swiveling in.
IMPORTANT! Do not lay the DC cable
over the DC main switch or across the
DC main switch connection block.
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EN-US