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Renewables: "talking 'bout my generation"

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Comments

  • EricMears
    EricMears Posts: 3,313 Forumite
    Part of the Furniture 1,000 Posts Name Dropper
    shavy65 wrote: »
    On another note, has anyone seen any substantial decrease in efficiency as their system ages?
    Here's a chart of every month's generation on our system with the PVGIS prediction shown on same axis (Aug 2011 is a 'silly' result for only two weeks).

    I can't see any particular trend other than random weather effects.





    4_years_results_as_graph.jpg
    NE Derbyshire.4kWp S Facing 17.5deg slope (dormer roof).24kWh of Pylontech batteries with Lux controller BEV : Hyundai Ioniq5
  • shavy65
    shavy65 Posts: 562 Forumite
    Tenth Anniversary 500 Posts
    Very interesting, many thanks for alleviating my worries!
    3.975 kWp System, South facing, 21 degree pitch, 15 x Canadian Solar Elps, Samil Inverter, location NE Scotland (Fraserburgh) Bring on the Sun :beer:
  • zeupater
    zeupater Posts: 5,390 Forumite
    Part of the Furniture 1,000 Posts Name Dropper Combo Breaker
    edited 4 January 2016 at 4:45PM
    shavy65 wrote: »
    On another note, has anyone seen any substantial decrease in efficiency as their system ages?
    Maybe I`m just paranoid (or maybe just less observant) but I didn`t think my system`s generation peaks were as high this summer past as the first year, although the difference in overall generation for the previous 2 years is negligible.
    For example this first summer I seemed to have quite a few days of high 20`s and even a few into the 30`s, this year I had nothing like that.....could always just be down to the NE Scotland weather mined you!
    Hi

    As per other replies, we've seen no noticeable efficiency decrease.

    Our annual generation figures have increased year by year (calendar) until last year (2015), which, despite being well on target to continue the trend until the miserable performance from mid October onwards pulled the performance down. Despite this 2015 only ended up ~1kWh (rounded up) lower than 2014 which is pretty interesting, but that's the thing with averages - they average out over time ....

    HTH
    Z
    "We are what we repeatedly do, excellence then is not an act, but a habit. " ...... Aristotle
    B)
  • EricMears
    EricMears Posts: 3,313 Forumite
    Part of the Furniture 1,000 Posts Name Dropper
    zeupater wrote: »
    that's the thing with averages - they average out over time ....
    Given that the PVGIS estimates (I do wish people would stop calling them 'Targets' !) are the average of the last 30 years, we'd really need to wait until we've got 30 years worth of results to compare with them before drawing any conclusions about our figures. MY four and a bit years is a start - but hardly significant.
    NE Derbyshire.4kWp S Facing 17.5deg slope (dormer roof).24kWh of Pylontech batteries with Lux controller BEV : Hyundai Ioniq5
  • Merlin139
    Merlin139 Posts: 7,281 Forumite
    Part of the Furniture 1,000 Posts Name Dropper Photogenic
    0.18826 O's

    Rain!!!!
    3.795 kWp Solar PV System. Capital of the Wolds

  • Oscargrouch
    Oscargrouch Posts: 4,393 Forumite
    Part of the Furniture 1,000 Posts Name Dropper Photogenic
    Merlin139 wrote: »
    0.18826 O's

    Rain!!!!
    Rain, Rain and more rain....0.48 O's...m1205.gif..s0423.gif..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).
  • legoman62
    legoman62 Posts: 5,033 Forumite
    Part of the Furniture 1,000 Posts Name Dropper
    Merlin139 wrote: »
    0.18826 O's

    Rain!!!!

    Same here = 0.225 O's today...and there's more:eek::eek:
    16 Sanyo Hit 250s.4kWp SMA 3.8kWp inverter. SW roof. 28° pitch. Minimal shade. Nov 2011 install. Hybrid car. Ripple Kirk Hill. N.E Lincs Coast.
  • ajbell
    ajbell Posts: 1,151 Forumite
    0.5 Os today.
    4kWp, South facing, 16 x phono solar panels, Solis inverter, Lincolnshire.
  • Rheumatoid
    Rheumatoid Posts: 1,024 Forumite
    Part of the Furniture 500 Posts Photogenic Name Dropper
    Sunnier than forecast yesterday and a surprising 1.7775 O's. Today looking grim though. Be lucky to break 0.1 O's I reckon.
    16 Panel (250W JASolar) 4kWp, facing 170 degrees, 40 degree slope, Solis Inverter. Installed 29/9/2015 - £4700 (Norfolk Solar Together Scheme); 9.6kWh US2000C Pylontech batteries + Solis Inverter installed 12/4/2022 Year target (PVGIS-CMSAF) = 3880kWh - Installer estimate 3452 kWh:Average over 6 years = 4400 :j
  • Markj1110
    Markj1110 Posts: 912 Forumite
    0.14 O's yesterday, Oh dear!!! :(
    3.96 kWp System, SSE Facing, 30 Degree Pitch, 12 x 330W BenQ Panels, Solar Edge Inverter, Lincoln, Lincolnshire. Installed 26th May 2015.
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