MODULE SELECTION
Please refer to the detailed electrical characteristics from the product data sheet.
Only wire modules of the same type and performance class. This is the only way to ensure maximum
yields and system operation that is secure and free from disruptions.
GUIDELINES
Modules cannot be operated for more than 90 consecutive days under open-circuit or short-circuit
conditions. Consult with Calyxo if you are unable to uphold this time frame.
All of the components attached to the system need to have an operating window that matches the
‘Maximum Power Point’ (MPP). The components need to be capable of operating at the MPP at all
times.
SAFETY FACTORS
Under normal conditions, a photovoltaic module is likely to experience conditions that produce more
current and/or voltage than reported at standard test conditions. Accordingly, the values of ISC and
VOC marked on this module should be multiplied by a factor of 1.25 when determining component
voltage ratings, conductor ampacities, fuse sizes, and 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 may be applicable.
For a module the multiplying factor at conditions of an irradiance of 125 mW/cm2, AM 1.5 spectrum,
and a cell temperature of minus 10°C (plus 14°F) for VOC and plus 75°C (167°F) for ISC is to be
determined and this factor is to be indicated in the instructions. Thus, it is advised to take a security
factor of 1.25 for the parameters listed below into account, in accordance with IEC 61730-1 Paragraph
12.7:
•
Determining the voltage measurement values (V
) of components
•
Determining the current measurement values (I
•
Determining fuse sizes
OC
SC
) of conductors
•
Measuring control systems to the outputs of the solar modules.
At any rate, the applicable national regulations for installing electrical systems need to be observed.
6.5.1
Series connection
Only wire modules of the same type and performance class. Please take special note of the positive
sorting and the tolerance ranges for V
oc
and V
MPP
indicated in the data sheet of the respective CX series
module.
Series connection of the modules is only permitted up to the maximum system voltage provided in the
respective currently applicable data sheet.
When installing the modules, take into account all working conditions and relevant technical regulations
and standards. Doing so ensures that the maximum system voltage, including the required safety
margins, are not exceeded.
When determining the string length, also take the voltage limit of the inverter into account.
