mixing strings of panels??

Wbuffetjr1
Wbuffetjr1 Registered Users Posts: 92 ✭✭
in Off Grid Solar & Battery Systems #1
I HAD 3 strings of Solar Word 345 watt panels.  One string is demolished.  I can longer buy the 345 watt panels , but can buy the Solar World 350s.  If I have 2 strings of 345s and 1 string of 350s will that be a problem? Classic 200 charge controller. 

Thanks for the input 
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  • Horsefly
    Horsefly Registered Users Posts: 476 ✭✭✭✭
    #2
    Shouldn't be a problem at all. Looks like it is actually the identical panel, but has tested out to a slightly higher efficiency. Vmp on a string of two would be 0.6V higher, which is less than 1%. Go for it.
    Off-grid cabin: 6 x Canadian Solar CSK-280M PV panels, Schneider XW-MPPT60-150 Charge Controller, Schneider CSW4024 Inverter/Charger, Schneider SCP, 8S (25.6V), 230Ah Eve LiFePO4 battery in a custom insulated and heated case.
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  • Estragon
    Estragon Registered Users Posts: 4,496 ✭✭✭✭✭
    #3
    Even identical panels can vary a bit (eg part of an array gets a cooling breeze). If the frame still physically fits, it should be fine.
    Off-grid.  
    Main daytime system ~4kw panels into 2xMNClassic150 370ah 48v bank 2xOutback 3548 inverter 120v + 240v autotransformer
    Night system ~1kw panels into 1xMNClassic150 700ah 12v bank morningstar 300w inverter
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  • Wbuffetjr1
    Wbuffetjr1 Registered Users Posts: 92 ✭✭
    #4
    great! Thanks fellas!
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  • mike95490
    mike95490 Solar Expert Posts: 9,583 ✭✭✭✭✭
    #5
    Tough luck with that tree fault detector circuit.  Hope the fix is not too much of a pain.
    Powerfab top of pole PV mount | Listeroid 6/1 w/st5 gen head | XW6048 inverter/chgr | Iota 48V/15A charger | Morningstar 60A MPPT | 48V, 800A NiFe Battery (in series)| 15, Evergreen 205w "12V" PV array on pole | Midnight ePanel | Grundfos 10 SO5-9 with 3 wire Franklin Electric motor (1/2hp 240V 1ph ) on a timer for 3 hr noontime run - Runs off PV ||
    || Midnight Classic 200 | 10, Evergreen 200w in a 160VOC array ||
    || VEC1093 12V Charger | Maha C401 aa/aaa Charger | SureSine | Sunsaver MPPT 15A

    solar: http://tinyurl.com/LMR-Solar
    gen: http://tinyurl.com/LMR-Lister ,

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