Tech Help

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  1. What is a blocking diode?

    Asked 04/29/2011

    Can somebody explain me what a blocking diode is and how it is helpful in a solar module? Also, how is it different than bypass diode?

    Question – 3 comments

  2. What is a bypass diode?

    Asked 04/29/2011

    Can somebody explain me the function of bypass diodes and why they are helpful in a solar module? Thanks

    Question – 1 comment

  3. SMA Sunny Boy 3000 is highly recommended!

    Asked 04/29/2011

    Hi, I am working on an interconnection in Monterrey, Mexico, with a SMA Sunny Boy 3000 inverter us, (6) 195W monocrystalline solar panels.

    Question – 1 comment

  4. What is a good pass through box for a single string to connect the string to the conduit?

    Asked 04/29/2011

    What is a good pass through box for a single string to connect the string to the conduit?

    Question – 1 comment

  5. What battery material enclosure is recommended? Steel or plastic?

    Asked 04/28/2011

    I have a custom made stainless steel enclosure (like a deep tray with a topper).

    Question – 1 comment

  6. Can I vertically mount an AGM battery?

    Asked 04/28/2011

    Due to space limitations, I'd like to mount four batteries vertically in a custom made stainless steel battery enclosure.

    Question – 1 comment

  7. What grounding lugs do I need for the SolarWorld modules?

    Asked 04/27/2011

    What grounding lugs do I need for the SolarWorld modules?

    Question – 1 comment

  8. Can I use 250A DC disconnect with Xantrex XW6048?

    Asked 04/27/2011

    I have a trace 250 amp dc disconnect and i would like to use it with a xw6048 that you sell, is there any reason why i cant?

    Question – 1 comment

  9. Which charge controller should I choose?

    Asked 04/27/2011

    Would like some input regarding proper charge control selection for stand alone and grid tie systems.

    Question – 4 comments

  10. How does the Enphase D380 know the difference between going single- or three-phase?

    Asked 04/26/2011

    How does the Enphase D380 know the difference between going single- or three-phase?

    Question – 1 comment

  11. Should I wire my off-grid system for 24V or 48V?

    Asked 04/22/2011

    I am building a small (2kW) off-grid system with a  Outback FLEXPower One FP1-4 w/ GVFX3648 inverter and ET Solar panels.

    Question – 1 comment

  12. Can you wire dissimilar modules in the same string?

    Asked 04/21/2011

    I have a 10 Sharp NT-175U1 modules in my solar pv array and I am planning to expand the system by adding two more modules.

    Question – 1 comment

  13. What is the difference between mill finish and clear anodized rail?

    Asked 04/20/2011

    Is there any application difference? Do you recommend using mill finish flashing or rails in an application in California?

    Question – 1 comment

  14. What type of top clamps and grounding equipment shall I use with DPW top of pole mounts?

    Asked 04/20/2011

    I want to use DPW PowerFAB top of pole mount for my panels.

    Question – 1 comment

  15. What is the weight per square foot that the RapidRac?

    Asked 04/20/2011

    I'm looking for the Unirac RapidRac specification. What is the maximum load that Rapidrac will support?

    Question – 3 comments

  16. Is this a suitable junction box to use with my Enphase installation?

    Asked 04/20/2011

    I am hooking four 240W panels using an Enphase interconnect cable and then planning on this box then 10-3 running to service panel?

    Question – 3 comments

  17. Could you help me with wiring Enphase Interconnect cable?

    Asked 04/20/2011

    Okay, I need reassurance..

    Question – 4 comments

  18. Could you provide suppliers for Viscous Dampers for stabilizing solar trackers?

    Asked 04/19/2011

    Could someone provide suppliers for long travel viscous dampers for stabilizing tracking panels from wind gusts?

    Question – 1 comment

  19. What is included with the UniSolar PVL-136 Thin Film Panels?

    Asked 04/18/2011

    What is included with the UniSolar PVL-136 solar panels?

    Question – 1 comment

  20. Is an AC lightning arrestor essential for a PV system?

    Asked 04/17/2011

    I have an off grid system, I have DC lightning arrestors, but I read somewhere that I should have an AC surge arrestor and an AC surge cap

    Question – 1 comment

  21. Do I lose production from both modules if the D380 fails?

    Asked 04/15/2011

    If the Enphase Energy D380 inverter fails, am I losing the energy from both modules?

    Question – 1 comment

  22. Does Enphase Energy D380 inverter work with only one module?

    Asked 04/15/2011

    Can I connect only 1 panel to an Enphase D380 and not connect the 2nd panel without impacting the performance of the unit?

    Question – 1 comment

  23. Do the Trina Solar panels have MC4 or Tyco connectors?

    Asked 04/15/2011

    Can you please let me know what type of connectors come on the Trina solar panels ?  Does it vary depending on the panel size/model?

    Question – 1 comment

  24. Does higher Torque Value on installation damage PV module?

    Asked 04/15/2011

    I am installing ET Solar panels ( ET-P660230B ) on Unirac HD rails using top-mounted clamps.  The ET installation manual recommends the

    Question – 1 comment

  25. What is the difference between a standard and high frequency inverter?

    Asked 04/14/2011

    Specifically, the SMA Sunny Boy 3000US Inverter vs. SMA Sunny Boy 3000 HF US Inverter (the latter is slightly more expensive).

    Question – 1 comment