Yingli Solar PV Modules, Installation and User Manual
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YLxxxP-23b
Superstrate: 3.2~4.0 mm thick;
EVA: 0.43~0.5mm thick;
Substrate: 0.285 mm ~ 0.295 mm thick;
Frame: Type” Q239”, ” Q241”, ” Q243”, ”
Q267”, ” Q268”, ” Q270”
Module Fire
Performance:
Type 2
B.The fire rating of the module is valid only when mounted in the manner
specified in the mechanical mounting instructions.
C.The module is considered to be in compliance with UL 1703 only when the
module is mounted in the manner specified by the mounting instructions.
D.A module with exposed conductive parts is considered to be in compliance
with UL 1703 only when it is electrically grounded in accordance with the
instructions and the requirements of the National Electrical Code.
E.Any module without a frame (laminate) shall not be considered to comply
with the requirements of UL 1703 unless the module is mounted with hardware
that has been tested and evaluated with the module under this standard or
by a field Inspection certifying that the installed module complies with the
requirements of UL 1703.
A P P L I C AT I O N I N F O R M AT I O N
Application Restrictions
Yingli Solar PV modules must be mounted on appropriate mounting structures
positioned on suitable buildings, the ground, or other structures suitable for PV
modules (e.g. carports, building facades or PV trackers). PV modules must not
be mounted on moving vehicles of any kind. Yingli Solar PV modules must not
be installed in locations where they could be submerged in water.
Yingli Solar PV modules must not be sited in locations where aggressive
substances such as salt or salt-water, or any other type of corrosive agent,
could affect the safety and/or performance of the PV modules. Although Yingli
Solar PV modules have passed the IEC 61701 salt-mist corrosion test with a
salt concentration of 5% by weight, galvanic corrosion can occur between the
aluminum frame of the PV module and mounting or grounding hardware if such
hardware is comprised of dissimilar metals. Yingli Solar recommends that only
stainless steel and aluminum metal directly contact PV modules in seaside
installations to limit corrosion.
Artificially concentrated light must not be directed on Yingli Solar PV modules.
Design Recommendations
Yingli Solar recommends that PV modules be mounted at a minimum tilt angle
of 10 degrees to allow for proper self-cleaning from normal rain showers.
Partial or complete shading of a PV module or modules can significantly reduce
system performance. Yingli Solar recommends minimizing the amount of shade
throughout the year to increase the amount of energy produced by the PV
modules.
Lightning protection is recommended for PV systems that are to be installed in
locations with high probability of lightning strikes.
E L E C T R I C A L I N S TA L L AT I O N
Electrical Configuration
Under normal conditions, a photovoltaic module is likely to experience
conditions that produce more current and/or voltage than reported at Standard
Test Conditions (STC: 1000 W/m
2
, AM 1.5, and 25°C cell temperature). As
required by the US National Electric Code (NEC), the short-circuit current (Isc)
should be multiplied by a factor of 1.25 and the open-circuit voltage (Voc) should
be multiplied by a factor of up to 1.25 based on the lowest ambient temperature
recorded for the installation location when determining component voltage
ratings, conductor current ratings, fuse sizes, and size of controls connected to
the PV output. Follow Section 690.7 in the (NEC) to determine the adjusted
system voltage value.
Refer to Section 690.8 of the NEC for an additional multiplying factor of 125
percent (80 percent de-rating) which may be applicable for sizing fuses and
conductors.
Voltages are additive when PV modules are connected directly in series,
and module currents are additive when PV modules are connected directly
in parallel, as illustrated in Figure 4. PV modules with different electrical
characteristics must not be connected directly in series. The use of suitable
third-party electronic devices connected to PV modules may enable different
electrical connections and must be installed according to the manufacturer’s
specified instructions.
Figure 4: Electrical diagrams of series and parallel wiring
The maximum number of PV modules that can be connected in a series string
must be calculated in accordance with applicable regulations in such a way
that the specified maximum system voltage of the PV module and all other
electrical DC components will not be exceeded in open-circuit operation at the
lowest temperature expected at the PV system location. In one and two-family
dwellings, PV source circuits and PV output circuits are permitted to have a
maximum system voltage up to 600 volts according to the NEC.
An appropriately rated overcurrent protection device must be used when the
reverse current could exceed the value of the maximum fuse rating of the
module. An overcurrent protection device is required for each series string if
more than two series strings are connected in parallel.
Cables and Wiring
Yingli PV modules are provided with two (2) stranded, sunlight resistant output
cables that are terminated with PV connectors ready for most installations. The
positive (+) terminal has a female connector while the negative (-) terminal
has a male connector. The module wiring is intended for series connections (i.e.
female (+) to male (-) interconnections), but can also be used to connect suitable
third-party electrical devices that may have alternative wiring configurations so
long as the manufacturer’s instructions are followed.
Use field wiring with suitable cross-sectional areas that are approved for use at
the maximum short-circuit current of the PV module. Yingli Solar recommends
installers use only sunlight resistant cables qualified for direct current (DC)
wiring in PV systems. The minimum wire size should be 12 AWG.
Type
Wire size
Temperature rating
Required Minimum Field Wiring
USE-2 or PV Wire
12 AWG
-40ºC to +90ºC
Table 1: Required minimum field wiring specifications
Cables should be fixed to the mounting structure in such a way that mechanical
Series Wiring (Voltage Additive)
Parallel Wiring (Current Additive)
