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Chapter 3
Module Electrical Connection Guidelines
The electrical connection/grounding must meet related regulations/standards of the
installation site or country and must be installed by a qualified installer.
Use series or parallel connections for the design of connections between modules in
accordance with the user's requirements for system power, voltage, or current.
Each Module is equipped with a junction box and connector with a certain level of water/dust
resistance and the junction box is equipped with two cables, one positive and the other
negative. Two Modules can be connected in series by connecting the positive cable of a
connector to the negative cable of the other connector; similarly, two Modules can be
connected in parallel by connecting their positive (or negative) connectors.
Incorrect connection or loose connection may cause electric arcs or electric shocks, damage
equipment, or cause fires. Please inspect and make sure that all electrical connections are firm
and fixed (the connections of the connectors should be firmly locked in place).
The maximum voltage in series connection of modules is the total voltage of all modules.
Please note that the maximum voltage in series connection cannot exceed the Module's
maximum permissible voltage (the maximum permissible voltage of the AUO Photovoltaic
Module is 1,000 VDC, as specified on the back of the Module). Similarly, the maximum current
in parallel connection of modules is the total current of all modules.
The output and voltage of the Module will exceed the rated values when operating under low
temperatures (<25°C). Consider the lowest possible ambient temperature of the year at the
installation site and use the open-circuit voltage temperature coefficient to calculate the
maximum number of modules allowable for series connection. The reference calculation
formula is as follows:
Maximum system voltage/module open-circuit voltage * [1 + module open-circuit voltage
temperature coefficient * (lowest ambient temperature of the installation site -25)]
The electrical connection of the module/system must be conducted with a dedicated cable for
solar photovoltaic systems with minimum requirements as follows:
1.
PV1-F or PV Wire cable standards
2.
The cross section of the cable must be greater than 4 mm
2
(or 12AWG)
3.
The rated voltage of the cable must exceed 1,000 VDC
4.
The cable materials must be suitable for outdoor use, insulated, and sunlight and
ultra-violet resistant.
5.
The applicable temperature range of the cable must be at least -40°C to +90°C.
When connecting cables, the minimum bend radius of the cable must be greater than 5 times
the cable diameter, as illustrated in Figure 8.
