INSTALLATION AND OPERATION MANUAL SOLAR MODULES Q.PEAK DUO BLK ML-G10/t
INSTALLATION AND OPERATION MANUAL SOLAR MODULES Q.PEAK DUO BLK ML-G10/t
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11
MOIUNTING OPTIONS
REQUIREMENTS
All
The loads in the table are related to the mechanical stability of the solar modules. The me-
chanical stability of the mounting system including clamps has to be evaluated by the system
supplier. The listed test load values have been determined with the following clamp parameters:
clamp width = 1.57 in (40 mm) and clamp depth = 0.39 in (10 mm).
The system installer is responsible for the determination of location-specific load requirements.
Ensure that the connection cables of the junction box do not run between laminate and mount-
ing rails.
Modules bend under load. Therefore, sharp objects (e.g. screws, ballast stones, rail ends, rails
with burrs or sharp corners) must not be placed near the module backside so as not to touch
the laminate under load.
Ensure that the junction boxes do not touch the mounting structure (e.g. shorts rails, ballast, etc.)
or the rooftop under load.
Clamps or insertion profiles etc. must not touch the glass (even under load).
Unbalanced loads (e.g. snow overhangs, snowdrifts) which result in locally significantly in-
creased loads must be removed or avoided by technical measures.
CL1a, CL2a, CL3,
FB1, FB2
Ensure that module frame is fixed directly on the rail of the substructure (no spacer allowed be-
tween the module and substructure).
CL1a
With push test loads of 5400 Pa: The clamp position is variable in the given range but the dis-
tance between the clamps along the long side of the module (span) must not be larger than
55.1in (1400 mm).
CL1b
Using short mounting rails are permissible, if they overlap under the module less than
8.27 in(210 mm). Minimum clearance between frame bottom edge and roof top must be ≥ 1.38 in
(35 mm).
CL1b, CL2b, CL3,
FB2, CL6c, CL6d
A minimum support depth of 0.59 in (15mm) is required on the back side of the module.
CL5
The minimum required support depth on the module backside is 0.39 in (10 mm) on long frame
side and 0.59 in (15 mm) on short frame side.
IP1
Ensure minimum support depth of 0.59 in (15 mm) on the backside and 0.39 in (10 mm) on the
front side of the module.
FB1, FB2
Use M8 corrosion-proof screws and washers (diameter ≥ 0.62 in (15.8 mm)) for mounting slots
(Detail A, Fig.1). Mounting screws and washers should have the same material properties.
CL6c, CL6d
Using short mounting rails under the modules are permissible, if they do not touch the laminate
under load.
2 Planning
2.3 Mounting options
2 Planning
2.4 Electrical layout
Module Selection
For detailed key electrical data, please refer to the actual data
sheet referring to the relevant Module (available at www.qcells.
com).
For maximum energy yields, mismatches of specified electric
current (I
MPP
) of more than 5 % should be avoided for all mod-
ules connected in series.
Safety Factor
During normal operation, a module may generate a greater cur-
rent and / or higher voltage than that determined under standard-
ized test conditions. Accordingly, the values of I
SC
and V
OC
marked
on the module should be multiplied by a facot of 1.25 when de-
termining:
■
the component voltage ratings,
■
conductor ampacities,
■
fuse sizes,
■
size of controls connected to the PV output.
Refer to Section 690-8 of the National Electrical Code for an
additional multiplying factor of 125 percent (80 percent derating)
which might be applicable.
Please follow the valid national guidelines for the installation of
electrical systems (refer to section 690-8 of the NEC for an ad-
ditional multiplying factor of 125 percent [80 percent derating]
which may be applicable).
Series Connection
Connection of modules in series is only permitted up to the maxi-
mum system voltage as listed in the applicable data sheet.
Take into account all possible operating situations and all rel-
evant technical norms and regulations when designing the
system. It has to be ensured that the maximum system voltage,
including all necessary safety margins, is not exceeded.
Take the voltage limit of the inverter into account when deter-
mining the maximum number of modules in the string.
Parallel Connection
Modules may be damaged by the occurrence of reverse currents
(caused by module defects, ground leaks, or defective insulation).
Ensure that the maximum reverse current load capacity indicat-
ed in the data sheet is met.
In order to limit reverse currents that may occur, we recommend
using the following safety options:
1) Layout with a limited number of parallel connected strings :
Without undertaking further current blocking measures, a maxi-
mum of two module strings may be operated in parallel on a sin-
gle inverter or MPP tracker.
2) Layout with string fuses :
Use overcurrent devices (e.g. fuses) according to the relevant
standards in each string. Use gPV-fuses according to IEC 60269-
6. Observe the maximum permitted number of strings as indicat-
ed in the specifications provided by the respective string fuse
manufacturer and the technical guidelines.
NOTE!
When installing different product versions, the lowest minimum
permitted reverse current load capacity applies.
Inverters
Inverters with or without transformers may be used.
