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  1. Despite what the salesman may

    Answered by on 08/25/2013

    Despite what the salesman may tell you when they are going for a sale - yes, you do need to clean the panels - but once a year is usually all that is needed.


  2. So far, Potential Induced

    Answered by on 08/23/2013

    So far, Potential Induced Degradation is a characteristic of Silicon semiconductor and crystalline silicon PV cells - it is pretty well managed and understood and not a p


  3. Why are Stion CIGS modules free of Performance Induced Degradation?

    Asked 08/23/2013

    Traditional Crystalline Silicon solar modules suffer from Performance Induced Degradation (PID), but Stion CIGS modules are free of PID.

    Question – 2 comments

  4. FERC Chair Jon Wellinghoff: Solar ‘Is Going to Overtake Everything’

    Added by Missing (not verified) on 08/22/2013

    By  Herman K.


  5. I do not know of a 5kW 3

    Answered by on 08/22/2013

    I do not know of a 5kW 3 phase inverters. If you wanted to go with microinverters Enphase has 3phase units. 


  6. Usually it's the AHJ

    Answered by on 08/21/2013

    Usually it's the AHJ (Authority Having Jurisdiction) which requires seismic anchors, not the racking manufacturer.


  7. Where can I find the seismic zone for my building in order to determine the best ballasted racking solution?

    Asked 08/21/2013

    I have a 120kW project in Northern California.

    Question – 1 comment

  8. 8/20. Word of the Week.

    Added by Alex O'Sullivan on 08/20/2013

    The thermal coefficient for PV modules (all types) is a negative coefficient that is used to describe how module voltage changes with te


  9. How does Depth of Discharge factor into Grid Connected battery systems?

    Added by Stuart Fox on 08/20/2013

    In order to design a battery that will last and provide reliable service for its full rated life, there are several criteria to consider,


  10. Trailers are probably not

    Answered by on 08/19/2013

    Trailers are probably not designed to carry an additional 5 or 6 pounds per square foot on the roof, so I would say no.


  11. It will give you the combined

    Answered by on 08/15/2013

    It will give you the combined capacity of 7.2 at either voltage. (110 or 240).


  12. Will an Outback FlexPower Two Output 240VAC at the combined inverter capacity?

    Asked 08/15/2013

    I'm interested in an Outback Flexpower Two FP2-10 prewired with a pair of VFX3648's.

    Question – 2 comments

  13. What about heat, is there a

    Answered by on 08/14/2013

    What about heat, is there a difference.  For example we are Bay Area installers, if we are installing in the Delta or Sacramento Valley, is there any practical difference


  14. Is my Trace 4024 inverter compatible to stack and connect to a new Xantrex 4024 inverter?

    Asked 08/13/2013


  15. I have a 43' trailer with a flat roof; can I put solar panels on top with a ballast system? And will this meet code anywhere?

    Asked 08/13/2013

    Do you think this would meet code anywhere to get a permit? I want to put 14 Helios 300 watt panels up. They are 78.11in x 66.5.

    Question – 1 comment

  16. 8/13. Word of the Week.

    Added by Stuart Fox on 08/13/2013

    LCOE is used for solar projects to describe the comparative cost between different systems.


  17. Here's an update to my

    Answered by on 08/08/2013

    Here's an update to my previous post: Now you can just add a Midnite solar E-Panel to the system .


  18. How to get the most life out of Flooded and Sealed Lead Acid Batteries

    Added by Natalie Maslow on 08/07/2013

    General Overview of Lead Acid Batteries Lead Acid batteries are still the most common form of energy storage for photovoltaic syste


  19. I'm guessing that if you have

    Answered by on 08/06/2013

    I'm guessing that if you have a reasonably efficient AC unit, it will draw about 9.5A at 240Vac.


  20. What size of the solar panel do I need for an air conditioned system (24,000 BTU)?

    Asked 08/03/2013

    Question – 1 comment

  21. Can I get protective covers for my battery terminals?

    Asked 07/31/2013

    I have 16 Rolls Surrette S530 6V batteries and would like to know if I can get protective covers for the terminals.


  22. Would You Rather Fight a Horse-Sized Duck or a Hundred Duck-Sized Horses?

    Added by Stuart Fox on 07/29/2013

    In December last year, CivicSolar published an article on the emergence of tier 1 UL listed AC modules and their applicability for pro


  23. It is probably possible if

    Answered by on 07/29/2013

    It is probably possible if the attachment hardware is the same size. Ironridge uses very high quality Quickmount standoffs in their kits.


  24. We have used this engineer

    Answered by on 07/29/2013

    We have used this engineer for many geotech and structural jobs. Highly  recommended. Liiban A. Affi, P.E.


  25. It will be hard to find a

    Answered by on 07/29/2013

    It will be hard to find a single phase 240 Vac inverter over 10kW because the amperage starts to exceed 50A and it becomes impractical to tie it to most 240Vac services.