How the voltage will change when the solar panels are being connected in series?

When setting up a photovoltaic power station，how do you match and connect voltage in series？Today we’re testing how the
photovoltaic panels changes voltage of when they’re connected in series.
We have 11 photovoltaic panels here,each panel has an open circuit voltage of 41.47 volts.
First, let’s check the voltage when six photovoltaic panels are connected in series,it’s 284.3 volts. Now let’s connect all 11 panels in series.and measure the total voltage.
That comes out to 521.7 volts.So when setting up a photovoltaic power station,you need to measure the voltage and current of each string to make
sure the inverter runs properly and efficiently.

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