Search:

Type: Posts; User: Zee

Page 1 of 8 1 2 3 4

Search: Search took 0.03 seconds.

  1. Replies
    28$$
    Views
    2,730

    Where is the 200 amp breaker panel? Roof? ...

    Where is the 200 amp breaker panel?
    Roof?
    Exposed to Sun?
    Indoors?
  2. Replies
    29$$
    Views
    3,154

    Based on random measurements in field I figure in...

    Based on random measurements in field I figure in real world (heat) Vmp goes down about 25% from rated Vmp.
    Rate Vmp is 418.2 Vmp.
    So my array might run around 300 VDC.
  3. Replies
    29$$
    Views
    3,154

    SYMO 24.0-3 480: Operating voltage range:...

    SYMO 24.0-3 480:

    Operating voltage range: 200-1000V
    DC startup voltage: 200V
    MPP-voltage range: 500-800V

    Array rated Vmp: 418.2 V (17 @ Mitsubishi 170W (24.6 Vmp rated each) per string)
    ...
  4. If you cannot place breaker opposite the...

    If you cannot place breaker opposite the feed.....120% allowance will not apply.
    The AHJ really has been lenient prior.

    BTW - downsizing the main breaker is my favorite strategy. I use it all...
  5. Replies
    29$$
    Views
    3,154

    Thank you, both. Yes, I am told I need a...

    Thank you, both.

    Yes, I am told I need a neutral.

    The building does have a 208Y/120 3PH 4W system.

    Curious in general with transformer terminology:
    I noticed you specified a "step up...
  6. Replies
    29$$
    Views
    3,154

    Never mind above questions. Fronius SYMO inverter...

    Never mind above questions. Fronius SYMO inverter it is.

    Is there a commonly used 24 kW, 480 to 208 VAC transformer in the solar biz?
    Any particular features or any xformer with above rating will...
  7. Replies
    7$$
    Views
    965

    I use the chat window on the Solaredge Support...

    I use the chat window on the Solaredge Support page, but I only have residential questions. might work for you.
    NO msgs, immediate feedback, more or less
  8. Replies
    29$$
    Views
    3,154

    So after weeks of delay and digging, it looks...

    So after weeks of delay and digging, it looks like i cannot easily un-combine the 11 DC strings.
    So i need an inverter with a single DC input.

    The Fronius SYMO fits the bill, due to what it...
  9. Replies
    14$$
    Views
    1,324

    FWIW - I prefer the "crusty" grounding bushings....

    FWIW - I prefer the "crusty" grounding bushings. These are hot dipped galvanized and look like they can handle weather.
    As opposed to the zinc plated ones.

    The steel is different too!
    I think...
  10. Replies
    14$$
    Views
    1,324

    "should be a ready to use product" yeah i...

    "should be a ready to use product"
    yeah i agree. but there isn't.

    sounds like you could make money on this.
  11. Replies
    14$$
    Views
    1,324

    what JBEN said. A standard aluminum lug that...

    what JBEN said.

    A standard aluminum lug that comes standard on a gr. bshng. will corrode terribly in a couple of years with a copper wire in it on roof top (presence of moisture).

    ILSCO and...
  12. Thread: PV design software

    by Zee
    Replies
    21$$
    Views
    3,008

    Oh, I am not talking about engineering or stamps....

    Oh, I am not talking about engineering or stamps.

    $300 for a DRAWING. By a drafter.....an Autocad jockey or architect is sufficient.

    Their job isn't to know what the contractor or engineer...
  13. Replies
    29$$
    Views
    3,154

    Thank you gentlemen for the excellent and diverse...

    Thank you gentlemen for the excellent and diverse info!

    Looks like I have to "uncombine" the DC input AND add a 480 to 208 VAC transformer.

    Although,
    I can skip transformer by getting 2 @ 15...
  14. Replies
    18$$
    Views
    2,021

    :thumbsup: or just leave it up to my guys. they...

    :thumbsup:
    or just leave it up to my guys. they will lose the LB cover. drainage solved.....
  15. Replies
    18$$
    Views
    2,021

    I often think there should be "uphill" and...

    I often think there should be "uphill" and "downhill" LB's. The latter with leetle weep holes.
    Recently, I have started removing gasket from bottom ones. Frankly, it will probably still hold water...
  16. Replies
    18$$
    Views
    2,021

    ya noticed:thumbsup:

    ya noticed:thumbsup:
  17. Replies
    6$$
    Views
    1,000

    Haven't run #6 EGC in 15 years. Just #10...

    Haven't run #6 EGC in 15 years.

    Just #10 under panels. (AWG equivalent to DC wire AWG required for DC)

    If exposed to mechanical/physical damage then yeah #6.

    So it is unclear if you are...
  18. Replies
    6$$
    Views
    1,000

    That is a good point, Jben. OP, do you mean...

    That is a good point, Jben.

    OP, do you mean separate racks or rails? A rack is more of a complete structure vs a rail is just, well, a length of rail.
  19. Replies
    18$$
    Views
    2,021

    yeah sure a jumper conduit. that is what i do...

    yeah sure a jumper conduit.
    that is what i do all the time,
    as long as it is PV Wire or Engage Cable (Enphase)
    AND you use GROUNDING bushings on the ends of the EMT......that you have replaced...
  20. Replies
    4$$
    Views
    782

    Shame 20A fuse not allowed. Even the appropriate...

    Shame 20A fuse not allowed. Even the appropriate fuse may burn out if CB exposed to full sun on roof.

    In other words, definitely do not use a 20A fuse...but rather ensure fuse location (combiner...
  21. Replies
    29$$
    Views
    3,154

    480V vs 208V inverters

    Some info needed on commercial systems. I do mainly resi.

    IN GENERAL
    For commercial, what is the most common AC Voltage in the USA?
    How common is 208 Vac Wye?
    If, as I read, 208 is the most...
  22. "full ARRAY current"? Like several strings worth?...

    "full ARRAY current"? Like several strings worth? That seems huge.
  23. Thread: Romex for DC run

    by Zee
    Replies
    35$$
    Views
    4,640

    yes, should have been clear: no Romex outdoors...

    yes, should have been clear: no Romex outdoors ever.
    UV tears everything apart. Except PV wire.
  24. Thread: Romex for DC run

    by Zee
    Replies
    35$$
    Views
    4,640

    Depending on specific eaves windows...

    Depending on specific eaves windows etc......Consider running down other side of house and across crawlspace....., sometimes an option....., sometimes too much work.
  25. Thread: Romex for DC run

    by Zee
    Replies
    35$$
    Views
    4,640

    For anyone wanting to run Romex or where conduit...

    For anyone wanting to run Romex or where conduit is difficult or ugly: I recommend a micro-inverter system.
    No DC. All AC. You can run all the Romex you want.

    E.g. new construction: rough-in...
Results 1 to 25 of 200
Page 1 of 8 1 2 3 4