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Thread: solar panel wiring

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    Default solar panel wiring

    Hi 5kw solar system do they wire panel s series or parallel?
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    You can connect them in series, parallel or a combination of both.
    Generally a 5Kw system is 20 x 250W Solar Panels
    They are mostly connected in Series for the above
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    if they are all in series , then what would the DC voltage at the inverter input be ? around 300?

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    is it DC system with the big ugly inverter or is it the micro inverters which look after only 2 panels and AC to the switchboard??

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    Quote Originally Posted by VroomVroom View Post
    if they are all in series , then what would the DC voltage at the inverter input be ? around 300?
    The voltage would be around 900volts a bit high for most inverters I expect. So 2 strings would be the go I think, or 3 in which case you would need 21 panels or 18

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    You just can't stack panels in series. It becomes very dangerous.
    5kW of panels assuming 200W panels @ 80V OC all in series would be 2000V. With 2.5 amps behind it and breakdown or accidental contact is going to be fatal.

    How you wire your panels depends on how you want to run your system and what voltage all the other components are.
    Ideally higher voltages have slightly better efficiency, but they also become more hazardous. But often you're restricted to what's practical or what you can afford.

    I run (4x12V panels in series) x 6 strings in parallel
    also with (2 x 24V panels in series) x 3 strings in parallel

    Charges banks of 48V batteries running 24V inverters and 12V lights.
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    With what I have seen most of the local ones are Split in 2 into the inverter that is 1 x 10 panels into 1 Input and 1 x 10 into Second input into Inverter.

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    Mine are in series.
    10 x 35v o/c = 350vDC.

    I have 2 system and 2 inverters.(Early install)

    Grid connected @230vAC




    Good source for solar info
    Have a nice day

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