Tech Help

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  1. Have a customer asking us to see if mfg. of panels has a certificate stating they are qualified to receive the fed. tax credit?

    Asked 04/03/2014

    Used ET panels, did a 9600 W grid tie installation, and now my customer wants all the info on how to apply for the federal tax credit.

    Question – 1 comment

  2. what is the main design difference between a grid tied inverter and off grid inverter?

    Asked 03/31/2014

    1- What is the main difference between a grid tied inverter and an off grid inverter in respect of their internal design characteristic?

    Question – 1 comment

  3. Hi, can i have micro-inverter configuration used for an off-grid with an string inverter backup solution?

    Asked 03/31/2014

    I will like to use a string of micro-inverters on a PV-array to deliver AC through a string inverter so that the battery bank attached to th

    Question

  4. Can AC power from a micro-inverter into a string inverters AC input to charge batteries while excess powers home? How feasible?

    Asked 03/29/2014

    I will like to use 26 micro-inverters with 26 300W-PVs in an array to deliver AC to a string inverters AC input.

    Question

  5. Hi, Can the Enphase trunk cable be split to two 120V circuits? Thank you - Les

    Asked 03/27/2014

    Hi, Can the Enphase trunk cable be split to two 120V circuits?

    Question – 1 comment

  6. Will clouds effect performance of my inverter?

    Asked 03/18/2014

    I have two solar inverters one a (Ever inverter 3 kv), with 16x185 watt panels and the other a (SMA solar inverter 4 kw), with 16x250 wa

    Question – 1 comment

  7. With outdoor temperatures reaching 128F in Havasu are panel mounted inverters a good idea?

    Asked 03/15/2014

    My local installer has told me he does not install AC panels for that reason.

    Question – 2 comments

  8. Is the SMA Sunny Boy 2500 U inverter compatible with SMA Sunny Boy 2500HF-US inverter?

    Asked 03/13/2014

    1

    Question – 1 comment

  9. Many thanks for your support. Again how do i calculate battery power into watts. ei 9000 watts of DC would be how many 12 dcv a

    Asked 03/13/2014

    Many thanks for your support.  Again, how do i calculate battery power into watts.

    Question – 1 comment

  10. How many PV 250 watts needed for 8KVA sOLAR iNVERTER

    Asked 03/12/2014

    How many PV 250 watts are needed for 8KVA Solar Inverter?

    Question – 1 comment

  11. Would you recommend wall mounting solar panels?

    Asked 03/04/2014

    The project in question is a stucco over wood construction wall facing at 225 degrees at 32.7150° N longitude (San Diego, CA).  Space wou

    Question – 1 comment

  12. I am a structural engineer. Is it possible to purchase the software that does the structural presentation?

    Asked 02/24/2014

    I am a structural engineer.  Is it possible to purchase the software that does the structural presentation?

    Question – 1 comment

  13. Why is my JA panel not listed or recognized by my utility?

    Asked 02/24/2014

    What if my utility does not recognize my panels?

    Question – 1 comment

  14. What is the required fire rating in California for all PV Solar modules?

    Asked 02/17/2014

    I understand that there has been a change in the requirements for California regarding the fire ratings PV panels (Modules are required to

    Question – 1 comment

  15. For 70kW DC grid tie on a TPO 5 degree slanted roof

    Asked 02/16/2014

    Hi There, I need your help for: For 70kW DC grid tie on a TPO 5 degree slanted roof what racking do you recommend?

    Question – 1 comment

  16. Proper product for strain relief of the PowerOne trunk cable directly into the Soladeck box?

    Asked 02/01/2014

    The outer diameter of the cable is 15mm or about 9/16".

    Question – 1 comment

  17. What are the drawbacks of connecting a single phase inverter to 3 phase service voltage?

    Asked 01/24/2014

    If I use a single 5kw inverter set up to output 208VAC single phase on a building with 3 phase 208V service voltage, what are the drawback

    Question

  18. How do i hook up a 6x6 cell with 3 bars on it?

    Asked 01/17/2014

    Question

  19. What is the difference between Hanwha SolarOne and Hanwha Q Cells?

    Asked 01/15/2014

    Question – 1 comment

  20. Can you use 1000v rated modules in a 600v system?

    Asked 12/17/2013

    Question – 1 comment

  21. Does a solar panel have to be CEC listed to be eligible for the 30% Federal Tax Credit?

    Asked 12/16/2013

    Question – 2 comments

  22. Where can I find a general single line diagram for grid connected small PV-systems?

    Asked 12/12/2013

    Where can I find a general single line diagram for grid connected small PV-systems?

    Question – 3 comments

  23. How can I replace the elevation motor in a Sonnensystem tracker?

    Asked 12/10/2013

    How can I replace the elevation motor in a Sonnensystem tracker? Is there a manual for that?

    Question

  24. What is the shunt for?

    Asked 12/04/2013

    Question – 1 comment

  25. What nuts and bolts do I need for the Prosolar channel nuts?

    Asked 12/03/2013

    Hi, We are changing out solar panels and need some replacement parts - 5/16" sliding inserts (channel nuts) which I can find onlin

    Question – 1 comment