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Solar Panels: Evacuated Vs InRoof flat plate

  • 12-11-2010 5:34am
    #1
    Munster_Munch
    Closed Accounts Posts: 10 ✭


    Hi

    Solar panels on new-build only place to install is on front of house.
    I think the InRoof flat panels looks far better then evacuated tubes, although the evacuated tubes seem to perform better.

    What are your views: Should I go with what looks better or decide purely on what systems is more efficient? Is there much of a performance difference between the two?

    Could you PM me the name of system\supplier you think are the best.

    Thanks
    Munster_Munch.


Comments

  • #2
    quentingargan
    Registered Users, Registered Users 2 Posts: 1,627 ✭✭✭quentingargan


    There are pros and cons for both. As you've pointed out, roof integrated flatplates are less visually obtrusive. They are also more durable. Vacuum systems will need to have their flasks / tubes replaced after about 20 years as they will ultimately lose their vacuum. Chinese flasks are much cheaper to replace than tubes that have the heatpipe integrated, but either way, it is a job to get up there to do the work. Flatplates should last about 40 to 50 years.

    Both will produce the same amount of total heat over a year, but flatplates will produce more heat during May to July - probably more than you need. Vacuum systems suffer less heat loss in cold or cloudy weather, so they run for a longer season, and that additional season is their main benefit.

    If your house is well insulated, with a very short heating season, that extra seasonal cover by vacuum tubes will mean more to you, because when the central heating is off, your hot water is a lot more expensive.


  • #3
    ecochris
    Closed Accounts Posts: 3 ✭ecochris


    You are really optymistic 20 years for vacum tubes ?
    ;)
    I dont think so, but some of companies will give you this guarantee i know.
    Maybe for flask tubes?

    "Both will produce the same amount of total heat over a year, but flatplates will produce more heat during May to July - probably more than you need. Vacuum systems suffer less heat loss in cold or cloudy weather, so they run for a longer season, and that additional season is their main benefit."

    I agree with you.


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