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Renewable Energy: Recommendations for PV for new build

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  1.  
    • CommentAuthormartin1974
    • CommentTimeOct 11th 2011
     
    I have been looking at the viability of installing photo-voltaic panels on our new build. I have quickly found that it is a mine field and wondered if there are any particular manufacturers/suppliers I should look at?

    The orientation of our roof is East South East and as it is being built from scratch I thought it more sensible to go for panels that sit directly onto the rafters rather than having the panels that sit above roof tiles. A couple of suppliers have told me that this type of panel is less efficient as they cant cool down as easily.

    Is this true or were these suppliers just used to doing retrofit jobs and therefore more likely to favour above tile panels?!

    any guidance/ personal experience would be greatly appreciated
    • CommentAuthorowlman
    • CommentTimeOct 11th 2011
     
    Intergrated, "in roof panels" look good, but I would hate to be faced with any maintainance issues, not necessarily the panels but also the roof itself, a few years down the line. Personally I'd go for an " on roof" system, I'm glad I did. After a few weeks you'll stop looking at them and it won't matter anyway.
    • CommentAuthormartin1974
    • CommentTimeOct 11th 2011
     
    I hadn't thought about maintenance and had focused on the idea of why put £500 of tiles on a roof and then cover them with PV panels, but I guess in the scheme of things £500 is soon earned back with more efficient panels?
  4.  
    in roof system , could allow use to small rafter sizes due to reduced load , so has benefits that way

    no sure what drop in efficiency would be caused , would be interested to find out ,
    certainly panels drop output as temperature increases , as an example the REC 240W panel Isc ( short circuit current) drops 0.074%/deg. C as it varies from STC ( standard test conditions) 25 deg. C

    Schuco do an inroof system and make there own range of panels which may be more suited to it, though I've not used it myself
  5.  
    i presume installer would cross batton to create air space above felt to aid cooling

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