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5
with dimention of 1650mm long and 8~10mm wide, 4
columns adhesive should be applied for each module. Laying
the modules on the treated surface (see the above picture) and
pressing gently against the tile. In order to achieve the best
bonding performance, it is required to install the modules
within 5 minutes once the adhesive is applied on the tile.
5.2.3 screw mounting
Drilling 5 mounting holes on the module as shown above (the
holes’ position could be customized as per customer required).
Fixing the modules to the mounting bracket by screws and
bolts, as shown above. Screwing up the module at all 5
positions.
5.3 Electrical installation
The deviations always exist between the nominal value and
test value in standard test condition of Rated electrical
characteristics of module such as Isc, Voc and Pmax, Standard
Test Conditions: 1000 W/m
2
Irradiance, 25°C Cell
Temperature and 1.5 Air Mass, normally, the value of current
and voltage generated from Modules will be probably higher
than values under standard test condition. When determining
module voltage ratings, conductor current ratings, fuse sizes,
and size of controls connected to the PV output, on the basis
of highest local temperature, combine with temperature
coefficient of current in manual, ISC can be calculated by
multiplying by the coefficient of 1.25; On the basis of lowest
local temperature, combine with temperature coefficient of
voltage in manual, Voc. can be calculated. When modules are
in series, voltage to be added up; when modules are in parallel,
current to be added up. PV modules with different electrical
properties can’t be connected in series, different electrical
components of modules may cause mismatch of electrical
connection, make sure to install them in accordance with
manual provided by manufacturer.
5.3.1 Connection type
The maximum number of modules that can be connected in a
series string must be calculated in according with applicable
regulations in such a way that the specified maximum system
voltage (According to IEC61730 tests and appraisal, the
maximum system voltage is 1000Vdc or 1500Vdc depending
on the series and model.) of the modules and all other
electrical DC components will not be exceeded in open circuit
operation at the lowest temperature expected at the PV system
location. Correction factor for the open-circuit voltage can be
calculated
based
on
the
following
formula:
Voc=1-βVoc×(25-T). T is the lowest expected ambient
temperature at the system location. β(%/
℃
) is the temperature
coefficient of the selected module Voc (Refer to
corresponding datasheet).
An appropriately rated over-current protection device must be
used when the reverse current could exceed the value of the
maximum fuse rating of the modules. An over-current
protection device is required for each series string if more
than two series strings are connected in parallel.
