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  1. Replies
    2$$
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    213

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

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

    (and that WAS a lifetime rated roof)
  2. 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...
  3. Replies
    11$$
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    693

    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?
  4. Replies
    11$$
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    693

    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"...
  5. 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...
  6. Thread: tap conductors

    by Zee
    Replies
    5$$
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    381

    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...
  7. Replies
    16$$
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    725

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

    Always good to share the pain:cry:

    Wait..what? Is it 250 VAC in Germany?
  8. Replies
    46$$
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    1,745

    what does WAG mean?

    what does WAG mean?
  9. Replies
    16$$
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    725

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

    check the latest spec sheet. SMA usually corrects these mistakes eventually......it may now be 32A??
  10. Replies
    16$$
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    725

    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 ...
  11. Replies
    46$$
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    1,745

    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...
  12. Replies
    46$$
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    1,745

    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...
  13. Replies
    16$$
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    963

    Yes to your original Q's. One caveat: 40 amps...

    Yes to your original Q's.

    One caveat: 40 amps PV max IF you do not reduce main breaker rating.
    (I am currently reducing main breaker from 200A to 175A. That gives me 25 plus amps = 65 A.)
    ...
  14. Thread: Should I?

    by Zee
    Replies
    9$$
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    630

    I assume you are an electrician? If so, I've...

    I assume you are an electrician?
    If so, I've always thought that - of all trades - they are best suited to do quality solar installs.
    The roofing and structural aspects are negligible.... and if...
  15. Replies
    3$$
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    375

    yup. Your logic is good. Only EGC in rack on...

    yup.
    Your logic is good.
    Only EGC in rack on dc systems.

    However, If it is a MICRO inverter system with the older micro-inverters.... then a GEC is needed on roof!
    "Maybe that is what you...
  16. Replies
    28$$
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    1,405

    Great response Jben. It helped me too. Are we...

    Great response Jben. It helped me too.
    Are we striking a ground rod also for every "line side tie" ? (AKA supply side connection)?
    I am told I should.
  17. Replies
    5$$
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    465

    AC disconnect within sight of inverter.

    AC disconnect within sight of inverter.
  18. Replies
    8$$
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    961

    You just need adequate space in the DC Disco. to...

    You just need adequate space in the DC Disco. to transition. The typical Square D HU361 dc disco (30A, 3 pole, unfused) has adequate space.

    I take it this is a grounded system?

    (SIDENOTE: I...
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    7$$
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    664

    What are your inverters?

    What are your inverters?
  20. Replies
    7$$
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    664

    done it myself before. cost 400 bucks for cutler...

    done it myself before. cost 400 bucks for cutler hammer..... i believe, in my case.
    not cheap for a breaker.
    BUT, beats a service change.
  21. Replies
    6$$
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    745

    Thanks kwired Golddigger and jaggedben, Kwired:...

    Thanks kwired Golddigger and jaggedben,
    Kwired:
    that was what i was wondering, is a disco switch before meters even allowed? Sounds like, then,
    1. yes, per NEC
    2. maybe per POCO.

    Golddigger:...
  22. Replies
    6$$
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    745

    Main Disconnect before meters

    I have a situation i do not understand.

    I would like to tie in a (N) 2p50A PV breaker.
    However the 100 AMP fused and rated, main switch is on the UTILITY side of all the meters.
    The...
  23. 1. yes 2. don't know. (I land combined AC...

    1. yes
    2. don't know.
    (I land combined AC EGC/DC GEC in "associated equipment".
    I interpret that term widely: wherever I land PV breaker.)
    3. don't know
    4. yes.
    (Given 2. i must rely on (E)...
  24. Replies
    13$$
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    946

    Yes, I agree. Hopefully he can tap the wire...

    Yes, I agree. Hopefully he can tap the wire itself and not land in the terminals.
  25. Thread: 110.21(B)

    by Zee
    Replies
    3$$
    Views
    384

    1. I use Hellerman Tyton, pre-printed labels...

    1. I use Hellerman Tyton, pre-printed labels for the 90% of my labels that are worded the same on every install.
    I trust their quality a bit more than mine, below.

    2. For the custom made...
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