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Renewables: "talking 'bout my generation"

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Comments

  • tunnel
    tunnel Posts: 2,601 Forumite
    Part of the Furniture 1,000 Posts Combo Breaker
    ajbell wrote: »
    Tomorrows weather forecast says i will get around 4 hours of solid sunshine midday as well as a bright morning.
    smiley-laughing025.gif And you believe that?
    2 kWp SEbE , 2kWp SSW & 2.5kWp NWbW.....in sunny North Derbyshire17.7kWh Givenergy battery added(for the power hungry kids)
  • EricMears
    EricMears Posts: 3,313 Forumite
    Part of the Furniture 1,000 Posts Name Dropper
    edited 20 December 2015 at 10:18AM
    ajbell wrote: »
    Tomorrows weather forecast says i will get around 4 hours of solid sunshine midday as well as a bright morning.
    I really hope you (and they) are right but not holding my breath.


    10am Sunday : Sun shining, clear sky almost a kW being generated. Maybe ajbell's forecasters got it right for once ?
    NE Derbyshire.4kWp S Facing 17.5deg slope (dormer roof).24kWh of Pylontech batteries with Lux controller BEV : Hyundai Ioniq5
  • MarkBargain
    MarkBargain Posts: 1,641 Forumite
    I haven't posted on here before, why are kWh called Os?

    I have a 12 panel system with 8 panels facing south east and 4 panels south west. They generated 1.17 kWh today and have made over 1 the last four days so not as low as some on here despite not really seeing the sun.
  • edwink
    edwink Posts: 3,007 Forumite
    Part of the Furniture 1,000 Posts Homepage Hero Photogenic
    edited 19 December 2015 at 10:38PM
    MarkBargain wrote: »
    I haven't posted on here before, why are kWh called Os?

    I have a 12 panel system with 8 panels facing south east and 4 panels south west. They generated 1.17 kWh today and have made over 1 the last four days so not as low as some on here despite not really seeing the sun.

    Hi

    Welcome aboard the nut house

    Take a look at Oscargrouch's signature for the definition of O's.

    Edwink ;)
    *3.36 kWp solar panel system,10 x Ultima & 4 x Panasonic solar panels, Solaredge Inverter *Biomass boiler stove for cooking, hot water & heating *2000ltr Rainwater harvesting system for loo flushing *Hybrid Toyota Auris car *RIP Pingu, Hoppy, Ginger & Biscuit *Hens & Ducks* chat thread. http://forums.moneysavingexpert.com/showthread.php?t=5282209
  • ajbell
    ajbell Posts: 1,151 Forumite
    He didnt ask for the definition he asked why.
    I dont know but i would guess that it represents a way of directly comparing the output of different sized systems.
    4kWp, South facing, 16 x phono solar panels, Solis inverter, Lincolnshire.
  • Oscargrouch
    Oscargrouch Posts: 4,393 Forumite
    Part of the Furniture 1,000 Posts Name Dropper Photogenic
    edited 20 December 2015 at 9:04AM
    MarkBargain wrote: »
    I haven't posted on here before, why are kWh called Os?

    I have a 12 panel system with 8 panels facing south east and 4 panels south west. They generated 1.17 kWh today and have made over 1 the last four days so not as low as some on here despite not really seeing the sun.
    Welcome Mark, Long History, don't go there, but it is the best way of making a reasonable comparison between large and small systems. Check out the O's of the massive field panel systems and you may find that you do better than they do...coffee.gif
    2.5 kWp PV system, SSW facing, 45 Deg Roof. ABB Inverter, Monitor: 'Wattson'.
    Reg. for FIT Nov 2011. "It's not what you generate; it's how you use it that matters". One very clean Vauxhall Diesel Sri, £30.00 Road Tax: B)

    Definition of 'O's = kWh/kWp (kWh = your daily & accurate Generation figure) (kWp = the rated output of your PV Panels).
  • MarkBargain
    MarkBargain Posts: 1,641 Forumite
    Oscargrouch wrote: »
    Welcome Mark, Long History, don't go there, but it is the best way of making a reasonable comparison between large and small systems. Check out the O's of the massive field panel systems and you may find that you do better than they do...coffee.gif

    But a kWh is a kWh, regardless of the size of system, so I just wondered why we call them Os on here. O for 'Output'?
  • tunnel
    tunnel Posts: 2,601 Forumite
    Part of the Furniture 1,000 Posts Combo Breaker
    edited 20 December 2015 at 11:49AM
    MarkBargain wrote: »
    But a kWh is a kWh, regardless of the size of system, so I just wondered why we call them Os on here. O for 'Output'?
    It's a long story as to what an O is but It's not a kWh, an O is your daily generation divided by your system size.


    An example would be 2kWh(daily production)/4kWp(usual system size) would give 0.5 O's
    Or 20kWh/4kWp is 5 O's(or an/a Hawaii as we like to call them)
    2 kWp SEbE , 2kWp SSW & 2.5kWp NWbW.....in sunny North Derbyshire17.7kWh Givenergy battery added(for the power hungry kids)
  • Sterlingtimes
    Sterlingtimes Posts: 2,548 Forumite
    Part of the Furniture 1,000 Posts Name Dropper
    Our Os at pvoutput.org are called "Efficiency" and are mapped. Efficiency is shown on the graph y axis as kWh/kW.

    http://www.pvoutput.org/list.jsp?id=41615&sid=38020
    I have osteoarthritis in my hands so I speak my messages into a microphone using Dragon. Some people make "typos" but I often make "speakos".
  • EricMears
    EricMears Posts: 3,313 Forumite
    Part of the Furniture 1,000 Posts Name Dropper
    Sterlingtimes wrote: »
    Our Os at pvoutput.org are called "Efficiency" and are mapped. Efficiency is shown on the graph y axis as kWh/kW.

    http://www.pvoutput.org/list.jsp?id=41615&sid=38020
    However, the term 'efficiency' is also (and I suggest more justifiably) used to describe the amount generated as a percentage of total insolation. Having two different properties with the same name seems somewhat confusing !
    NE Derbyshire.4kWp S Facing 17.5deg slope (dormer roof).24kWh of Pylontech batteries with Lux controller BEV : Hyundai Ioniq5
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