help needed

wesley
wesley Registered Users Posts: 1
in Solar Beginners Corner #1
hi there , i got a question ,do you have to earth your pv panel structure witch is mounted on my roof ?
second question, can one mix different wattage panels eg. 145w and 250w pv's connected in series to a GTI
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  • ggunn
    ggunn Solar Expert Posts: 1,973 ✭✭✭
    #2
    Re: help needed
    wesley wrote: »
    hi there , i got a question ,do you have to earth your pv panel structure witch is mounted on my roof ?
    second question, can one mix different wattage panels eg. 145w and 250w pv's connected in series to a GTI
    Yes, absolutely you need to ground all metal structures on your roof - modules and racking. In some cases you can mix different modules on an inverter, but you have to pay attention to voltages and currents and do the math; you cannot just mix them randomly.
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