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Bifacial panels on a slate roof

  • 25-09-2023 12:32PM
    #1
    randombar
    Registered Users, Registered Users 2 Posts: 3,479 ✭✭✭


    So I understand the reflective idea but how reflective are grey slates to help reflect solar onto the back of these panels?

    Anyone any experience?



Comments

  • #2
    slave1
    Moderators, Sports Moderators Posts: 19,738 Mod ✭✭✭✭slave1


    Total waste of money IMHO without any hard data



  • #3
    randombar
    Registered Users, Registered Users 2 Posts: 3,479 ✭✭✭randombar


    https://www.boards.ie/discussion/comment/121154887#Comment_121154887

    An installer I know has seen some good results from them and I'm just wondering has anyone else.



  • #4
    DC999
    Registered Users, Registered Users 2 Posts: 1,566 ✭✭✭DC999


    Afaik they are really for ground mounts. We only have maybe 2 or 3 inches between the roof and panels on the roof. So the back of them won't get light.



  • #5
    con747
    Registered Users, Registered Users 2 Posts: 8,890 ✭✭✭con747


    https://www.boards.ie/discussion/comment/121157068#Comment_121157068

    Ask him to show you the data showing the extra generation, I would think if you put 1 extra normal panel up you would get better results. As @DC999 said they are a few inches away from the slates which are a dark colour so how much sunlight will be reflected to the underside? Very little I would imagine.

    Don't expect anything from life, just be grateful to be alive.



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