using panels with differing voltages?

vsheetz
vsheetz Registered Users Posts: 18 ✭✭
in Off Grid Solar & Battery Systems #1
Sanyo 60 volt panels in parallel with 30 volt panels. Using a MPPT Morningstar TriStar 45/60 or similar.

Ok to do? Pros and cons?

Thanks!
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  • BB.
    BB. Super Moderators, Administrators Posts: 33,613 admin
    #2
    Re: using panels with differing voltages?

    Are those really Vmp=60 volts and Vmp=30 volt panels?

    What is the battery bank voltage? 24 volt or less? If you go with 60 volt Vmp panels, you cannot use them on most controllers with a 48 volt battery bank. Vmp=60 volts is too low of voltage for charging a 48 volt bank and Vmp-array=120 volts is too high for most MPPT charge controllers (including the typical MorningStar TS family).

    -Bill
    Near San Francisco California: 3.5kWatt Grid Tied Solar power system+small backup genset
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  • vsheetz
    vsheetz Registered Users Posts: 18 ✭✭
    #3
    Re: using panels with differing voltages?
    BB. wrote: »
    Are those really Vmp=60 volts and Vmp=30 volt panels?

    What is the battery bank voltage? 24 volt or less? If you go with 60 volt Vmp panels, you cannot use them on most controllers with a 48 volt battery bank. Vmp=60 volts is too low of voltage for charging a 48 volt bank and Vmp-array=120 volts is too high for most MPPT charge controllers (including the typical MorningStar TS family).

    -Bill

    12v battery bank.
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