PHOTOWATT PW60HT-C-XF, Installation Manual

Page: 30 / 68

D81-P06-01 GB R5 28/07/2020 www.photowatt.com
4
3.0
MECHANICAL / ELECTRICAL SPECIFICATIONS
Module electrical ratings are measured under
Standard Test Conditions (STC) of 1000 W/m2 irra-
diance, with an AM1.5 spectrum, and a cell tempe-
rature of 25°C. Main electrical characteristics under
STC are also stated on each module label. Please
refer to the datasheet or the product nameplate for
the maximum system voltage.
Under certain conditions, a module may produce
more current or voltage than its STC rated power.
As a result, a module open-circuit voltage and short-
circuit current under STC should be multiplied by
1.25 when determining component voltage ratings,
conductor ampacities, overcurrent device ratings,
and the size of controls connected to the PV output.
An additional 1.25 multiplier for the short-circuit cur-
rent (giving a total multiplier of 1.56), may be appli-
cable when sizing conductors and fuses.
Alternatively, a more accurate correction factor for
the open-circuit voltage can be calculated using
the following formula :
C
voc
= 1-
α
Voc
x (25 - T)
T (°C) is the lowest expected ambient temperature
at the system installation site.
α
Voc
(%/ºC) is the voltage temperature coefficient
of the selected module (refer to corresponding da-
tasheet)
Electrical calculations and design must be perfor-
med by competent engineer or consultant.
TABLE 1. LOW TEMPERATURE CORRECTION
FACTORS FOR OPEN-CIRCUIT VOLTAGE
Lowest Expected Ambient
Temperature (°C/°F)
Correction factor
24 to 20 / 76 to 68 1.02
19 to 15 / 67 to 59 1.04
14 to 10 / 58 to 50 1.06
9 to 5 / 49 to 41 1.08
4 to 0 / 40 to 32
-1 to -5 / 31 to 23
1.10
1.12
-6 to -10 / 22 to 14 1.14
-11 to -15 / 13 to 5 1.16
-16 to -20 / 4 to -4 1.18
-21 to -25 / -5 to -13 1.20
-26 to -30 / -14 to -22 1.21
-31 to -35 / -23 to -31 1.23
-36 to -40 / -32 to -40 1.25
4.0
UNPACKING AND STORAGE
PRÉCAUTIONS
•
Module should be stored in a dry and ventilated
environment to avoid direct sunlight and mois-
ture. If modules are stored in an uncontrolled
environment, the storage time should be less
than 3 months and extra precautions should
be taken to prevent connectors from being ex-
posed to moisture or sunlight.
•
Unpack module pallets carefully, following the
steps shown on the pallet. Unpack, transport
and store the modules with care.
•
Modules must always be unpacked and ins-
talled by two people. Always use both hands
when handling modules.
•
Do not lift modules by their wires or junction box;
lift them by the frame.
•
Stacks of modules should contain no more than
12 modules, and the frames should be aligned.
•
Do not place excessive loads on the module or
twist the module frame.
•
Do not stand, step, walk and/or jump on mo-
dules under any circumstances. Localized
heavy loads may cause severe micro-cracks at
cell level, which in turn may compromise mo-
dule reliability and void EDF ENR PWT’s war-
ranty.
•
Do not carry modules on your head.
•
Do not drop or place objects (such as tools) on
the modules.
•
Do not use sharp instruments on the modules.
Particular care should be taken to avoid mo-
dule glass being damaged by sharp objects, as
scratches may directly affect product safety.
•
Do not leave modules unsupported or unsecured.
•
Do not change the wiring of bypass diodes
•
Keep all connectors clean and dry at all times.