All rights reserved Shenzhen SOFARSOLAR Co ., Ltd.
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All rights reserved Shenzhen SOFARSOLAR Co ., Ltd.
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Type
MPPT voltage
range
1000V dc
Sofar10000TL-Sx Sofar15000TL-Sx Sofar17000TL-Sx Sofar20000TL-Sx
350~850Vdc 370~850Vdc 420~850Vdc 430~850Vdc
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 SOFAR 10-20KTL.
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 SOFAR 10-20KTL 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 SOFAR 10-20KTL 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 SOFAR 10-20KTL.
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 SOFAR 10-20KTL may be
damaged.
SOFAR 10K~20KTL
User manual
SOFAR 10K~20KTL
User manual
4.5 Connecting DC Input Power Cables
Connect the SOFAR 10-20KTL to PV arrays over DC input power cables.
Input mode selection：SOFAR 10-20KTL has 2 MPPT, The two MPPT can run independently,
but also can be operated in parallel, According to the system design, the user can choose the
mode of MPPT operation.
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