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  1. Replies
    3$$
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    275

    Right, to sense voltage on each individual hot...

    Right, to sense voltage on each individual hot wire to neutral. For example: you may have 240 Vac across the two hot wires...but that could mean the individual conductor voltages are balanced at 120...
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    4$$
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    338

    Given my experiences with these inverters, i am...

    Given my experiences with these inverters, i am 90% sure you need a replacement.
    (although i never work inside teh electronics on an inverter...... i do not know enough about teh electronics, and...
  3. Replies
    10$$
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    520

    I've seen the white stripe factory-painted onto...

    I've seen the white stripe factory-painted onto "PV Wire" before. Good idea.

    Red will fade to snow white on use-2.... i have seen it too... Will new PV wire behave similarly???? who knows....
  4. Replies
    18$$
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    930

    ...or just get a 175 Amp main breaker = up to 25...

    ...or just get a 175 Amp main breaker = up to 25 A of PV.
    ...or just get a 150 Amp main breaker = up to 50 A of PV.

    I tie in to centerfed panels and usually the inspector has no issue.
    I am...
  5. Replies
    16$$
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    677

    JaggedBEn, I agree with your excellent points. ...

    JaggedBEn, I agree with your excellent points.

    One little hair I'd like to split:
    I, also, used to say "well it isn't ever gonna be sunny (=high V) and be record cold simultaneously".

    In fact,...
  6. Thread: fire on pv systems

    by Zee
    Replies
    20$$
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    820

    On a solaredge system with dc optimizers strung...

    On a solaredge system with dc optimizers strung together in a string as opposed to the modules......
    where is the AFCI: optimizer or Inverter?

    If in the optimizer, couldn't that be a great way...
  7. Thread: fire on pv systems

    by Zee
    Replies
    20$$
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    820

    "thermal event" :p I don't think those companies...

    "thermal event" :p
    I don't think those companies got burnt..... they were, ummmm, "thermally event"-ed...:dunce:
  8. Thread: fire on pv systems

    by Zee
    Replies
    20$$
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    820

    Yes, good to know. I have seen the module j...

    Yes, good to know.
    I have seen the module j boxes burnt, and the problem is in that area. I am first to admit i was a big fan of BP solar for a while.....i have a couple systems being replaced.
    ...
  9. Thread: fire on pv systems

    by Zee
    Replies
    20$$
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    820

    fire on pv systems

    Thought this may spark (ahem!) discussion.

    http://www.ktvu.com/story/27350083/customers-complain-of-dangerous-problems-from-bp-solar-panels

    Wouldn't the AFCI .....now standard...prevent this?
  10. Thread: downsize neutral

    by Zee
    Replies
    6$$
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    453

    thanks guys, I will go with a number 10 egc and...

    thanks guys,
    I will go with a number 10 egc and match that size in the neutral.

    Inv. Is transformer less and ungrounded so I'll forgo a GEC.
    Ggunn, thanks for the original reply.
    jaggedben,
    I...
  11. Thread: downsize neutral

    by Zee
    Replies
    6$$
    Views
    453

    downsize neutral

    Does the Code permit me to downsize the neutral on an inverter output circuit? What section? To what size?

    Specifically: 11.4 kw inverter @ 240 VAC = 47.5 A @ 125% = 59 Amps ===> 6 AWG wires.
    ...
  12. Thread: 150 mph equipment

    by Zee
    Replies
    6$$
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    483

    From prosolar.com: "ProSolar works with ...

    From prosolar.com:
    "ProSolar works with all major solar manufacturers to ensure systems are fully engineered and tested. This has resulted in zero...
  13. Thread: Bare Copper

    by Zee
    Replies
    8$$
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    885

    I agree with Jaggedben: use insulated wire in...

    I agree with Jaggedben:
    use insulated wire in conduit and bare wire under array.

    Details:
    1. If the lay in lug on your bonding (grounding) bushing is rated for double lugging then transition...
  14. Replies
    2$$
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    505

    Just don't do it like this......:? (and that...

    Just don't do it like this......:?

    (and that WAS a lifetime rated roof)
  15. Three points briefly: A 100 kw system would need...

    Three points briefly:
    A 100 kw system would need about a 400 Amp breaker or fuses......why do you say 110 Amp?

    Are the lugs located opposite feed? (at the opposite end of the panel busbar from...
  16. Replies
    11$$
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    902

    Excellent point. You mentioned dealing with...

    Excellent point.

    You mentioned dealing with such terror twice. :weeping: How'd you do it? Hanger bolts and caulk?
  17. Replies
    11$$
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    902

    Interesting topic. In as much as..... I hate...

    Interesting topic. In as much as..... I hate those roofs...to install on, that is , they crush almost like aluminum foil. That being the case, the installer may very well want to put down a "cheap"...
  18. That looks good. It may be just late in the...

    That looks good.

    It may be just late in the evening here....or am i seeing that you applied the derate factor of 0.76 to increase the amperage of the Isc (by dividing), and also to downsize the...
  19. Thread: tap conductors

    by Zee
    Replies
    5$$
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    510

    Load side taps with fused discos for PV are...

    Load side taps with fused discos for PV are permitted by the NEC. Under certain conditions that apply to all load side connections (breakers in panels)

    HOWEVER, many local authorities will not...
  20. Replies
    16$$
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    904

    Always good to share the pain:cry: Wait..what?...

    Always good to share the pain:cry:

    Wait..what? Is it 250 VAC in Germany?
  21. Replies
    46$$
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    2,231

    what does WAG mean?

    what does WAG mean?
  22. Replies
    16$$
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    904

    check the latest spec sheet. SMA usually corrects...

    check the latest spec sheet. SMA usually corrects these mistakes eventually......it may now be 32A??
  23. Replies
    16$$
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    904

    OP: Don't get me started on the SMA offering of...

    OP:
    Don't get me started on the SMA offering of perfectly round, 1,000 Watt, German-engineered, inverter increments:rant:
    Except for the 3800, (which is nice) every single one of their 3, 4, 5, 6 ...
  24. Replies
    46$$
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    2,231

    OP: Why the absolute, unbending need for that...

    OP:
    Why the absolute, unbending need for that magical, 33rd panel (an additional 3% power)?

    If power is reason why not get a higher W panel? Even a 5 W increment is 33 @ 5 = an extra 165 W, kinda...
  25. Replies
    46$$
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    2,231

    Hold on. Panel Wattage may in fact be relevant...

    Hold on.
    Panel Wattage may in fact be relevant to inverter choice:
    if panels are in the 250 W range---> use Enphase M215's---->max allowable is 17 per string.
    Now you can do 33 panels. Even...
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