Fronius Galvo 208-240 1.5-1, Operating Instructions Manual

19

EN-US

Notes on DC Connection

General Informa-
tion 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 follow-
ing 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 calculation 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.

Inverter DC Con-
nection

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 da-
maged when the inverter swivels in, or the 
inverter could be prevented from swiveling 
in.

IMPORTANT! 

Do not lay the DC cable over 

the DC main switch or across the DC main 
switch connection block. 

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.