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marked on Modules should be multiplied by a factor of 1.25 when determining component voltage ratings,
conductor capacities, fusing sizes, and size of controls connected to the Modules output.
Voltages are additive when Modules are connected directly in series, and Modules currents are additive
when Modules are connected directly in parallel, as illustrated in Figure 5.
Modules with different electrical characteristics must not be connected directly in series.
Figure5 : Electrical diagrams of series and parallel wiring
The maximum number of Modules that can be connected in a series suing must be calculated in accordance
with applicable regulations in such a way that the specified maximum system voltage (The maximum system
voltage of Xtremesolar Modules Is
DC 1500V according to the safety appraisal of the IEC61730) of the
Modules and all other electrical DC components will not be exceeded in open-circuit operation at the
temperature expected at the PV system location.
Correction factor for the open-circuit voltage can be calculated based on the following formula: Cvoc-..= 1-
βvoc
X(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).