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Type: Posts; User: BandGap1.1eV

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  1. Replies
    20$$
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    1,736

    Confirmed. Like this.

    Confirmed. Like this.
  2. Replies
    20$$
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    1,736

    Best practices dictate a N-G bond only at one...

    Best practices dictate a N-G bond only at one location, the main service disconnect. While we design and treat the solar disconnect as a service disconnect, it's not considered a "service".

    Bond...
  3. I've seen this on occasion. For the instances...

    I've seen this on occasion. For the instances where you are seeing full string current, this is likely a case of swapped polarity. The installer goofed during install and you now have a high...
  4. Replies
    21$$
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    2,520

    See whats available from your local supply house...

    See whats available from your local supply house that specializes in PV. CED Greentech is a popular option. See whats in stock then do some homework based on those options. SunPower, LG, Qcells,...
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    5$$
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    892

    It would be very difficult to list manufacturers...

    It would be very difficult to list manufacturers to avoid. New names/manufacturers pop up on a monthly basis. In general look for the UL mark on their data sheet, modules with MC4 or amphenol...
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    3$$
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    834

    For the OCPD's use the traditional 1.25...

    For the OCPD's use the traditional 1.25 multiplier on the nominal current at each voltage.

    200,000/480/sqrt(3) * 1.25 = 300A OCPD
    200,000/208/sqrt(3) * 1.25 = 700A OCPD

    Obligatory caveats...
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    3$$
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    834

    No need to complicate it. Base the transformer...

    No need to complicate it. Base the transformer KVA on the cumulative inverter kW value. 200 kW worth of inverters = 200 kVA transformer. One caveat is that some commercial inverter manufacturers...
  8. Replies
    23$$
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    2,283

    Um. What? You're going to need to outline the...

    Um. What?

    You're going to need to outline the situation a bit (much) better than this.
  9. Easiest way to is to screw hardware cloth to the...

    Easiest way to is to screw hardware cloth to the underside of the racking purlins.

    20041
  10. This is the frustrating part. Based on what I...

    This is the frustrating part. Based on what I found there are multiple "editions" of 1699B.

    1699B-1 was released in 2011 and covered 1000V systems.
    1699B-2 was released in 2013 and clarified...
  11. Replies
    4$$
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    923

    Show him the video where M. Holt describes how...

    Show him the video where M. Holt describes how this aux. electrode is actually dangerous.

    https://www.youtube.com/watch?v=WlnFNTay-9Q

    It's an "auxiliary" item which by definition is not...
  12. I did some exhaustive research on this recently...

    I did some exhaustive research on this recently and found very few answers. All 1500V inverter manufacturers I found will claim AFCI compliance, but when you dig deeper the UL 1699 standard (there...
  13. When you combine a PV module and a roof tile you...

    When you combine a PV module and a roof tile you get the worst of both worlds; an inefficient and costly PV array (temperature, connectors, logistics, licensing, etc) and a roof with a 50 year price...
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    15$$
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    2,104

    I chuckle every time someone mentions "Fire...

    I chuckle every time someone mentions "Fire fighter safety" as the reason for driving the rapid shutdown conversation. No one ever seems to mention the safety of the installer or the O&M technician...
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    15$$
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    2,104

    About 90% of our systems get SolarEdge. We've...

    About 90% of our systems get SolarEdge. We've had bad experiences in the past with Enphase products and we've heard rumors about the financial stability of Enphase from residential installers we're...
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    7$$
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    1,282

    "No evidence those large systems are single...

    "No evidence those large systems are single phase. (Although it's unclear why the OP would feel that single phase is necessary.)" Because its a single phase grid on the island. I know of no way to...
  17. Replies
    7$$
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    1,282

    Single Phase Micro Grid

    Long story short, I'm developing a single phase micro grid and have brain damage from all the brick walls I've run into trying to find a solution. I've tried finding a multiport PV/battery inverter...
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