· Modules can be wired in series to increase voltage or in parallel to increase current. To connect modules in
series, connect the cables from the positive terminal of one module to the negative terminal of the next
module. To connect in parallel, connect the cables from the positive terminal of one module to the positive
terminal on the next module.
· The quantity of bypass diodes in the module's junction box may vary depending on the model series.
· Only connect the quantity of modules that corresponds to the voltage specifications of the inverters used in
the system. Modules must not be connected together to create a voltage higher than the maximum permitted
system voltage, even under the worst local temperature conditions (see Table 1 for the correction coefficients
that apply to open-circuit voltage).
· A maximum of two strings can be connected in parallel without the need to incorporate an over-current
protection device (fuses, etc.) in series within each string. Three or more strings can be connected in parallel if
an appropriate, certified over-current protection device is installed in series within each string.
Only modules with similar electrical outputs should be connected in the same string to avoid
or minimize mismatch effects in arrays.
· To minimize risk in the event of an indirect lightning strike, avoid forming loops when designing the system.
· The recommended maximum series fuse rating is stated in a table in the Annex.
· Modules should be safely fixed to bear all expected loads, including wind and snow loads. A minimum
clearance of 6.5 mm (0.25 in) between modules is required to allow for thermal expansion of the frame.
The small drainage holes on the underside of the module must not be blocked.
OPTIMUM ORIENTATION AND TILT
· To maximize your annual yield, find out the optimum orientation and tilt for PV modules in your region. The
highest yields are achieved when sunlight shines perpendicularly onto the PV modules.
AVOID SHADING
· Even minor partial shading (e.g. from dirt deposits) reduces yields. A module can be considered to be
unshaded if its entire surface is free from shading all year round. Sunlight should be able to reach the module
even on the shortest day of the year.
RELIABLE VENTILATION
· Sufficient clearance (at least 10 cm (3.94 in)) between the module frame and the mounting surface is required
to allow cooling air to circulate around the back of the module. This also enables condensation or moisture to
dissipate.
5.1
MODULE WIRING
CORRECT WIRING SCHEME
· Ensure that the wiring is correct before starting up the system. If the measured open circuit voltage (Voc) and
short-circuit current (Isc) differ substantially from the specifications, this indicates that there is a wiring fault.
CORRECT CONNECTION OF PLUG CONNECTORS
· Make sure that connections are safe and tight. Plug connector should not be subjected to stress from the
exterior. Connectors should only be used to connect the circuit. They should never be used to turn the circuit on
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