Effect of 2 panels in series

aparker
aparker Registered Users Posts: 2
in Solar Beginners Corner #1
I'm still trying to understand the TLIs and FLIs (Two/Three and Four/Five Letter Initialisms) associated with solar equipment.

I have a panel with the following specs:
Voc = 45 V
Isc = 5.5 A
Pmax = 190 W
Vmp = 36 V
Imp = 5.0 A

If I connect two of them in series, assuming I'm operating at the standard conditions and dealing theoretically rather than real world, in theory should the two panels just follow Ohm's law?

i.e. For 2 in series the array would have these specs?
Voc = 90 V
Isc = 5.5 A
Pmax = 380 W
Vmp = 72 V
Imp = 5.0 A

i.e. the voltages and pmax double but the currents remain the same?
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  • waynefromnscanada
    waynefromnscanada Solar Expert Posts: 3,009 ✭✭✭✭
    #2
    Re: Effect of 2 panels in series
    aparker wrote: »
    I'm still trying to understand the TLIs and FLIs (Two/Three and Four/Five Letter Initialisms) associated with solar equipment.

    I have a panel with the following specs:
    Voc = 45 V
    Isc = 5.5 A
    Pmax = 190 W
    Vmp = 36 V
    Imp = 5.0 A

    If I connect two of them in series, assuming I'm operating at the standard conditions and dealing theoretically rather than real world, in theory should the two panels just follow Ohm's law?

    i.e. For 2 in series the array would have these specs?
    Voc = 90 V
    Isc = 5.5 A
    Pmax = 380 W
    Vmp = 72 V
    Imp = 5.0 A

    i.e. the voltages and pmax double but the currents remain the same?

    Welcome to the forum! And to answer your question - - YES! You have it right!
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  • aparker
    aparker Registered Users Posts: 2
    #3
    Re: Effect of 2 panels in series

    Many thanks for confirming that and for your kind welcome :)
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  • Cariboocoot
    Cariboocoot Banned Posts: 17,615 ✭✭✭
    #4
    Re: Effect of 2 panels in series

    That's why we have the glossary of terms: http://forum.solar-electric.com/showthread.php?6136-Glossary

    :D
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  • ggunn
    ggunn Solar Expert Posts: 1,973 ✭✭✭
    #5
    Re: Effect of 2 panels in series
    aparker wrote: »
    I'm still trying to understand the TLIs and FLIs (Two/Three and Four/Five Letter Initialisms) associated with solar equipment.

    I have a panel with the following specs:
    Voc = 45 V
    Isc = 5.5 A
    Pmax = 190 W
    Vmp = 36 V
    Imp = 5.0 A

    If I connect two of them in series, assuming I'm operating at the standard conditions and dealing theoretically rather than real world, in theory should the two panels just follow Ohm's law?

    i.e. For 2 in series the array would have these specs?
    Voc = 90 V
    Isc = 5.5 A
    Pmax = 380 W
    Vmp = 72 V
    Imp = 5.0 A

    i.e. the voltages and pmax double but the currents remain the same?
    Correct. Question #2:What happens when you put the same two modules (panels) in parallel?
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  • Cariboocoot
    Cariboocoot Banned Posts: 17,615 ✭✭✭
    #6
    Re: Effect of 2 panels in series

    And why we have this thread on panel configuration: http://forum.solar-electric.com/showthread.php?16241-Different-Panel-Configurations-on-an-MPPT-Controller

    And this thread on battery configuration: http://forum.solar-electric.com/showthread.php?15989-Battery-System-Voltages-and-equivalent-power

    And why I have Ohm's law and the power formula in my signature.

    :D
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