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07 Electrical installation
7.1 Electrical performance
The electrical performance parameters of AlKO modules are detailed in the product specification. Standard test
conditions (STC) for PV modules: irradiance 1,000 W/m²; cell temperature 25 ℃; AM1.5. The maximum system
voltage of AIKO modules is 1,500 V.
When modules are in series connection, the string voltage is sum of every individual module in one string. When
modules are in parallel connection, the current is sum of the individual modules as shown below. Modules
connected in the same string shall have the same product code and nominal power.
If the module is passed through by a reverse current greater than the maximum fuse current of the module, the
module shall be protected with an over current protector of the same specification. If more than two strings
are connected in parallel, each module string shall be protected with an over current protector as shown above.
The string voltage must not exceed the maximum voltage that the system can withstand or the maximum input
power of the inverter or other electrical devices installed in the system. To ensure this, the open circuit voltage
of the array shall be calculated at the minimum expected ambient temperature at that location. The following
formula may be used:
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