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Junction box for solar panel

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  • Junction box for solar panel

    I've seen some cheap J boxes that handle up to 30 watt panels ($2.50) on Ebay. Mine is 60 watts, however. I sure wish the cheap one boxes would work. I would love to avoid paying over $19.00 for each J box. I will need 4.

    Does anyone know an alternative for me? What is really required?

    I need something less than 1-1/4" deep.

    Thanks.

  • #2
    Please define what you are calling a J-box
    Is that the box over the contacts on the back of your PV panel ?
    Is it the combiner box, where severa panels tie together ?

    J-boxes are usually rated as 2", 3", 4" deep. Do these need weathertight covers ?
    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

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

    Comment


    • #3
      Yep. The one behind the panel where the leds come from the cells. I thought about finding a polyurethene box from Allied Electronics and placing a 2 position terminal block inside it. I'm not sure what plugs to use or wire size to run to the connector box (box where all panel tie to).

      By the way, I tried the straw trick between my glass. I will let the silicone dry for a few days and even blow some canned cpu air into them to push fumes out before sealing.

      Comment


      • #4
        Originally posted by scheek View Post
        By the way, I tried the straw trick between my glass. I will let the silicone dry for a few days and even blow some canned cpu air into them to push fumes out before sealing.
        Lots of surface area, don't let the pressure build, or you will crack the glass or blow your seals out
        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

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

        Comment


        • #5
          Originally posted by scheek View Post
          Yep. The one behind the panel where the leds come from the cells. I thought about finding a polyurethene box from Allied Electronics and placing a 2 position terminal block inside it. I'm not sure what plugs to use or wire size to run to the connector box (box where all panel tie to)..
          Check some of the "big Box" home centers, they may have weather proof boxes too
          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

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

          Comment


          • #6
            I have about six straws around the perimeter. I will just airate the area and hope to blow some fumes out. Might try to use a vacumn pump in my last straw.

            Comment


            • #7
              Originally posted by scheek View Post
              I have about six straws around the perimeter. I will just airate the area and hope to blow some fumes out. Might try to use a vacumn pump in my last straw.
              FUMES ? Fumes from what ? That Vinegar (acetic acid) smell from cured silicone sealer ?

              that's not good. let it bake a couple days in the sun, and bring inside at night, to dry the thing out before you seal it.
              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

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

              Comment

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