Generac Power Systems PV Link, Руководство по установке

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Installation Manual for PV Link and SnapRS 9
Section 3 Installation Design
Installation Design Worksheet
Use this worksheet to determine the maximum
number of PV modules of a given type that
can be connected to a PV Link.
NOTE: Fewer PV modules can be used as
long as the minimum MPPT input voltage is
met.
1. Calculate an adjusted open circuit voltage
(VOC) for the module being installed using
the applicable NEC cold factor from
Table 1: NEC Cold Factor .
NOTE: The temperature correction factor
listed on the module nameplate can be used if
available.
2. Divide the PV Link Max VOC by the
Adjusted VOC from step 1 and round
down to determine the number of panels
that can be connected in series to the PV
Link without exceeding the open-circuit
voltage limit.
3. Divide the PV Link VMP (Voltage at Maxi -
mum Power) by the panel VMP and round
down to determine the number of panels
that can be connected in series to the PV
Link without exceeding maximum power
voltage.
4. Compare the results from step 2 and step
3 and choose the smaller number. Round
down to the nearest integer and record it
below. This is the maximum number of
modules of this type that can be con -
nected to the PV Link given the specified
NEC cold factor.
Panel
VOC
X
NEC Cold
Factor
=
Adjusted
VOC
PV Link
Max VOC
÷
Adjusted
VOC
=
VOC Limit
Result
420 V
PV Link
Max VMP
÷
Panel
VMP
=
VMP
Limit
360 V
Maximum Panels per Substring
Table 1 - NEC Cold Factor
Minimum Temperature (°F) NEC Cold
Factor
Minimum Temperature (°C)
49 to 41 1.08 9 to 5
40 to 32 1.10 4 to 0
31 to 23 1.12 -1 to -5
22 to 14 1.14 -6 to -10
13 to 5 1.16 -11 to -15
4 to -4 1.18 -16 to -20
-5 to -13 1.20 -21 to -25
-14 to -22 1.21 -26 to -30
-23 to -31 1.23 -31 to -35
-32 and below 1.25 -36 and below