All rights reserved
Shenzhen SOFARSOLAR Co ., Ltd.
C
Document Version 2.0(2016.03.29)
37
All rights reserved
Shenzhen SOFARSOLAR Co ., Ltd.
C
Document Version 2.0(2016.03.29)
38
User manual
User manual
Electrical Connections
Electrical Connections
Sunny Horse Series
(
10K~20KTL)
Sunny Horse Series
(
10K~20KTL)
Type
MPPT voltage
range
1000
Vdc
Sofar10000TL-Sx
Sofar15000TL-Sx
Sofar17000TL-Sx
Sofar20000TL-Sx
350
~
850
Vdc
370
~
850
Vdc
420
~
850
Vdc
430
~
850
Vdc
DC inductance should choose PV cable, from the junction box to the inverter, line voltage
drop is about 1~2%, The inverter is installed in the PV bracket, which saves the cable and
reduce the DC loss.
According to the inverter type, choose the inverter accessories (cables, fuse holder, fuse, breaker etc.), Sofar inverter
with PV array should be excellent performance, reliable quality. The open circuit voltage of PV must be less than
Maximum DC input voltage of Sofar inverter, The output voltage of the solar array must be consistent with the
MPPT voltage range.
Note
Table4-5 MPPT voltage range
Max. input
voltage
Note
Check polarity of PV array, to ensure the correct wiring of PV array;
Please don't put the positive or negative of the PV array connect to
earth.
If the two MPPT panels is independent, the input mode should be set as "independent
mode".
The setting method is introduced at chapter 6.3.
Independent mode (default):
If the two MPPT panels is paralleled together by combiner, the input mode should be set as
"parallel mode".
The setting method is introduced at chapter 6.3.
Parallel mode :
Note
Caution
Danger
PV modules generate electric energy when exposed to sunlight and can
create an electrical shock hazard. Therefore, when connecting DC input
power cable, cover PV modules by using opaque cloth.
Before performing electrical connections, ensure that voltages of the DC
cables should be within the safe voltage range, that is, lower than 60 V
DC, and the DC SWITCH is OFF. Otherwise, the high voltage may result
in fatal danger.
PV modules connected in series in each PV array are of the same specifications.
The open-circuit voltage of each PV array is always lower than or equal to 960 V DC.
The short-circuit current of each PV input is always lower than or equal to 12 A DC.
The output power of each PV array is always less than or equal to the maximum input
power of the Sunny Horse Series.
The positive and negative terminals of PV arrays connect to the positive and negative
DC input terminals respectively.
Ensure that the following conditions are met. Otherwise, fire accident may occur.
If the Sunny Horse Series connects to the power grid directly, ensure
that the PV arrays are not grounded.
If the DC voltage is a non-zero value between the positive terminal of PV
arrays and the ground, the PV arrays are subject to insulation faults.
Rectify the fault before connecting cables.
During PV array and Sunny Horse Series installation, the positive or
negative terminals of PV arrays may be grounded if power cables are
not properly installed or routed. In this case, an DC short circuit may
occur and damage the Sunny Horse Series.
If the PV arrays need to be grounded, install a three-phase four-wire
isolation transformer on the output side and disable the ISO detection
function by referring to 6.2.10 Setting Isolation Parameters. If an
isolation transformer is not installed, the Sunny Horse Series may be
damaged.
