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Solar Panel Orientation

  • 31-08-2009 5:09pm
    #1
    Mazotasan
    Registered Users Posts: 72 ✭✭


    Will be getting floors in shortly to trying to tie down solar system layout. I have attached a picture in plan view of our site. Originally I was thinking of putting all the panels on the garage and running back into the house, as its a decent run it is not really efficient.

    The other plan is to put them on the house in a SE / NW configuration the run is much shorter but approx. what impact does the configuration have on the overall efficiency?

    Another question Is there an actual calculation that can be carried out to see if you require a 'Heat dump'...or should all systems have a heat dump as std?

    300L SS tank
    Pressurized system
    Water supply from well and is hard
    3-4 Occupants
    Roof pitch 45 degrees

    SolarLayout.jpg


Comments

  • #2
    PeteHeat
    Registered Users, Registered Users 2 Posts: 648 ✭✭✭PeteHeat


    Hi,

    I would be inclined to mount the panels S.E. the loss in efficiency approx 15% can be compensated for by adding an extra panel or larger array of tubes.

    The heat dump will allow you to over compensate a little more extending the amount of time in spring / autumn you have hot water without having to use your immersion or boiler, it also means you don't have to be concerned about any excess heat generated in mid summer or when on holidays.

    .


  • #3
    Mazotasan
    Registered Users Posts: 72 ✭✭Mazotasan


    Cheers Pete, I need to check to see exactly how much I can fit on the SE Roof...the shape is not really lending itself to more than two but will check with CAD.


  • #4
    gears
    Registered Users Posts: 758 ✭✭✭gears


    Another alternative would be to put one on the S.W. facing roof and one on the S.E. facing roof. You should have enough space on the roof for this to work also any north facing solar panel will not produce very much heat.


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