The result of connecting two capacitors in parallel is a new capacitor whose capacitance is the sum of the values of the two you connected up. Note. the safe working voltage is equal to the lower of the two working voltages on the two capacitors.
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In order to connect four 2 microfarad capacitors such that the total capacitance is still 2 microfarads, connect two pairs of capacitors in series, and then connect the pairs in parallel. It does not matter, since all four capacitors are equal in value, if the center point is connected together or not.
Any answer "why" will depend on the rest of the circuit, which may an electric motor, a filter, or any number of other applications.If you're asking about 2 or capacitors in parallel, it is to provide a higher capacitance, since the total C will be the sum of each device's individual capacitances.Ctotal = C1 + C2 + C3 ...+ CnConversely capacitors in series obey the reciprocal law:1/Ctotal = 1/C1 + 1/C2 + 1/C3 ...+ 1/Cn
2 ohms. It is like connecting two 3 ohm resistors in series and then these two series resistors are connected in parallel with third 3 ohm resistor in parallel
(r+(c/2))
The best would be parallel as these panels normally have > 30V output voltage, which would be sufficient for a 24V inverter/load.There is also a risk of overvoltage on your charge controller connecting them in series, check if your charge contrroller can accommodate the sum of the max output voltage of the 2 panels before attemptins series on this configuration.There are additional efficiency advantages of connecting your panels parallel.