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Type: Posts; User: Zee

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  1. Replies
    16$$
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    365

    Yes, I agree: If two separate busbars are fed by...

    Yes, I agree:
    If two separate busbars are fed by a 4 pole breaker (which in essence is a pair of separate 2pole breakers with handles tied)....then it really is a split service, AKA a main with two...
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    6$$
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    Unless 2014 Rapid Shutdown requirements apply: ...

    Unless 2014 Rapid Shutdown requirements apply:

    DC
    If dc conduit is metal inside building, then dc disco adjacent or integrated with inverter is per code.
    AC
    AC disco within line of sight of...
  3. I have heard of termination issues for the finer...

    I have heard of termination issues for the finer stranded wires, not the 7 strand.
    (namely fine-stranded 2/0 and 4/0 cables for battery based PV)
  4. Thread: NABCEP preparation

    by Zee
    Replies
    13$$
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    474

    "NABCEP certification, the one that is hard to...

    "NABCEP certification, the one that is hard to get." :p
    If someone is giving you wrong answers.......No wonder!:jawdrop::happyno:

    I am a big fan of NABCEP by the way, it really is a meaningful...
  5. Can you switch inverters around so that you get...

    Can you switch inverters around so that you get down to 200A?

    I would think so, from 208.4 Amps.... you're getting mighty close.
    Usually you would find that you have extra capacity left over on...
  6. Thread: 110.21(B)

    by Zee
    Replies
    11$$
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    1,288

    Yes, my unstated point too: plenty of labels warn...

    Yes, my unstated point too: plenty of labels warn of high voltages already, ungr. circuits, line and load energized etc, . And on larger systems labelling well becomes worthwhile.
  7. Thread: 110.21(B)

    by Zee
    Replies
    11$$
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    1,288

    I stick a label on the outside to appease AHJ......

    I stick a label on the outside to appease AHJ...
    .....and one on the inside to appease my conscience and avoid all destructive UV.

    Sharpie will fade and burn out. So will my labels (when don't...
  8. Only experience was years ago...when solar was...

    Only experience was years ago...when solar was new...we just tapped into busbars with any lugs that fit.....but it won't past muster now.

    My experience is when i call a manufacturer of equipment...
  9. Thread: 110.21(B)

    by Zee
    Replies
    11$$
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    1,288

    Yup. Says outdoor. How do you label V and...

    Yup. Says outdoor.

    How do you label V and Amps?
  10. Replies
    15$$
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    578

    All this means is you have to run two dc circuits...

    All this means is you have to run two dc circuits as OP mentioned, instead of one. Say...12 and 18 KW each.
    Everything points in that direction..... there is a Connection Unit, as SMA calls it, a CB...
  11. Replies
    15$$
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    578

    From SMA Data Sheet: "Max. Input current / per...

    From SMA Data Sheet:
    "Max. Input current / per MPP tracker ........66A/33A"

    That indicates max 33 Adc per input. And 66 Adc only if you use both inputs.
    ---------------------------------------...
  12. Replies
    9$$
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    What they said. Also: Consider wire, sure....

    What they said.

    Also:
    Consider wire, sure. However, also consider conduit size in terms of extra work and cost. It' s been a while since I used larger than 1/2" EMT!:roll:

    Before, I used to...
  13. Replies
    11$$
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    455

    FYI: on DC systems use Vmp and Imp for...

    FYI:
    on DC systems use
    Vmp
    and
    Imp for Voltage Drop calcs!
    (not Max Sys. V, Voc or Isc)
  14. Replies
    11$$
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    455

    If Blake writes it, it is well though out.:D...

    If Blake writes it, it is well though out.:D
    ---------------------
    And remember: every time you up the Volts, you ALSO drop the Amps! Double benefit for V drop.

    On a recent ground mount I had...
  15. Thread: PV MODULE

    by Zee
    Replies
    5$$
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    388

    30 years.

    30 years.
  16. Thread: PV MODULE

    by Zee
    Replies
    5$$
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    388

    WHOA! I HEAR YOU! I would just add:...

    WHOA! I HEAR YOU!
    I would just add:
    Statistically: Panels "fade" about 0.5% a year. After 8 years, their output should be about 5% less.
    How many panels?
    What if any inverter?
    480V???
  17. Replies
    52$$
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    Right. Thank you. May i recommend any number...

    Right.
    Thank you.
    May i recommend any number of excellent forums for economics or pol.sci. debates. These are all valuable points and need to be made...elsewhere.
    This is an Electrical Code...
  18. Replies
    52$$
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    1,786

    I would never support taxes for solar. There is...

    I would never support taxes for solar.
    There is one government incentive: a tax credit of 30%.
    That is actually part of the taxes you pay being refunded back to you.
    And now i am guilty of...
  19. Replies
    52$$
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    1,786

    Thank you! I do pride myself on appealing to the...

    Thank you! I do pride myself on appealing to the self interest of my customers along with serving my own.:)
    Now, i need to stop spending countless unpaid hours on this forum!
  20. Replies
    52$$
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    1,786

    Some of us don't recommend ANYONE wash them. How...

    Some of us don't recommend ANYONE wash them. How is that trying to secure work for ourselves? And that in many cases we do show them if and when safe.
    But you know what i am sure you are right in...
  21. Replies
    52$$
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    1,786

    Well...i may make 100 bucks for a service call....

    Well...i may make 100 bucks for a service call. Say it's $200.
    Takes 2 hours of my day, door to door. ( drive out, set up ladder, get hose up there, clean and invoice). I can make almost $10,000...
  22. Congrats!

    Congrats!
  23. Replies
    31$$
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    1,399

    It is a superior solution. I agree. I think it' s...

    It is a superior solution. I agree. I think it' s admirable you go through the trouble of installing them, as they are not required, but help down the line.
    Me.....I am cheap, lazy, and fast....
  24. Replies
    31$$
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    1,399

    But our point is: there is no V at "cell level",...

    But our point is: there is no V at "cell level", until the panels are mounted.
    During installation we should
    1. have panels go on LAST and
    2. have GFDI fuse removed for installation safety (on...
  25. Replies
    31$$
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    1,399

    IF a CB is live and cannot be reasonably shut...

    IF a CB is live and cannot be reasonably shut down, a good idea is to remove the GFDI fuse!
    If you are lucky you are already working on an ungrounded system where that is unnecessary.

    Then V...
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