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no need for bypass diodes @12v

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  • no need for bypass diodes @12v

    I read here: "Bypass diodes are not needed on 12-volt systems (optional on 24-volt systems), and should always be used on 36 volt or higher systems.

    Is this true?

  • #2
    Read wrong, and it's a poor article. If you use a charge controller built in the last 20 years, it provides the blocking diode function automatically.

    I've not heard of any install in the last 20 years where any diodes needed to be installed. Sometimes, bypass diodes in the panel J-box will fail, and they need to be replaced.
    Powerfab top of pole PV mount (2) | 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