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  1. Thanks for the information. A

    Answered by elissared on 11/01/2012

    Thanks for the information. A professional roofer can make some suggestions about this matter.

    Answer

  2. Great article. I learned a

    Great article. I learned a

    Added by elissared on 11/01/2012

    Great article. I learned a lot from it. I'll be careful when I try to make it.

    Comment

  3. mg,Many installers will just

    Answered by SF_Solar on 11/01/2012

    mg, Many installers will just transition in junction boxes from the Engage cable to THWN wire for the run to the service panel.

    Answer

  4. The ground wire has to be #8

    Answered by SF_Solar on 11/01/2012

    The ground wire has to be #8 bare wire for the lay in lugs - the stranded wire just gets smashed in the set screws.

    Answer

  5. Yes there is a handy guide,

    Answered by AlexO on 11/01/2012

    Yes there is a handy guide, which you can find below. 

    Answer

  6. MG,As you saw in the article

    Answered by SF_Solar on 11/01/2012

    MG, As you saw in the article AC Coupling , there are three options besides the SMA Sunny Island / Sunny Boy combination: Outback, Xantrex and Magnum Energy.

    Answer

  7. I have two strings that each contain 11 230W panels in series. They are 36V, 8amp panels. Each string has its own DC+,DC-,GND

    Asked 11/01/2012

      I have two strings that each contain 11 230W panels in series. They are 36V, 8amp panels.

    Question – 1 comment

  8. Can you add battery back up without changing the inverter?

    Asked 11/01/2012

    I read your article on AC Coupling.  I have a customer with an 1800 watt grid tied system.  He has a Fronius IG 2000 inverter.

    Question – 2 comments

  9. There are a couple of reasons

    Answered by SF_Solar on 10/31/2012

    There are a couple of reasons not to extend a PV array above the ridge of a sloped roof.

    Answer

  10. What is the best way to combine Enphase circuits (240VAC) on the roof?

    Asked 10/31/2012

    I am trying to figure out the best way to combine Enphase microinverter branch circuits on a comp shingle roof?  

    Question – 1 comment

  11. Is it acceptable for solar panels to extend beyond the ridge of a sloped roof?

    Asked 10/31/2012

    Question – 2 comments

  12. I think there are a lot of

    Answered by ghacont@sbcglob... on 10/30/2012

    I think there are a lot of factors that go into what a pv system will actually produce.

    Answer

  13. Good article and I like the

    Good article and I like the

    Added by mhamon on 10/30/2012

    Good article and I like the inclusion of the fault signature FFT figure.  There is a point I have to correct and add some more detail.

    Comment

  14. Ghacont,Thanks for your

    Answered by SF_Solar on 10/30/2012

    Ghacont, Thanks for your observation - corrected for daily usage. I generally rounded up so the count I get is 82 modules, but now we have a ballpark estimate...

    Answer

  15. I disagree with the above

    Answered by ghacont@sbcglob... on 10/30/2012

    I disagree with the above comment. 33,313kw/365 days in a year = 91.27kw/per day(daily consumption). or 91270 watts/per day using the the assumptions above...

    Answer

  16. To be conservative, allow for

    Answered by SF_Solar on 10/29/2012

    To be conservative, allow for 77% of the module's STC rating (245W) for its hourly rate of production once it passes through an inverter, or 189W.

    Answer

  17. How many watts will a Suntech STP245-20/Wd produce?

    Asked 10/29/2012

    If I am using 33313 of kWhs a year, then how many panels are required?

    Question – 4 comments

  18. Thanks for the information. I

    Answered by floricecoln on 10/28/2012

    Thanks for the information. I think, I'll prefer the fastener.

    Answer

  19. This is a very nice tool for

    This is a very nice tool for

    Added by rjog on 10/25/2012

    This is a very nice tool for designing SolarEdge systems: http://www.solaredge.us/groups/us/installer-tools/site-designer

    Comment

  20. mg,Yes, the IEMU-03 can

    Answered by SF_Solar on 10/24/2012

    mg, Yes, the IEMU-03 can monitor up to 250 micro inverters.

    Answer

  21. Emmett,The fasteners have

    Answered by SF_Solar on 10/24/2012

    Emmett, The fasteners have about the same pull-out strength, but the stand-off is much more resistant to lateral loads.

    Answer

  22. How does the attachment strength of an Ejot Solar Fastener compare to that of a Unirac standoff?

    Asked 10/23/2012

    The Ejot Solar Fastener uses only one hanger bolt, whereas the Unirac Standoff uses two lag bolts.

    Question – 2 comments

  23. How many panels can you monitor with a single Enphase Envoy IEMU-03?

    Asked 10/22/2012

    I am working on a 50 kW solar project where I want to use Enphase micro-inverters.

    Question – 1 comment

  24. Here is the most recent

    Answered by SF_Solar on 10/18/2012

    Here is the most recent update on connecting the Fronius products for monitoring:  http://www.civicsolar.com/node/26156

    Answer

  25. Martha,You might want to

    Answered by SF_Solar on 10/17/2012

    Martha, You might want to consider using a Soladeck combiner.

    Answer