Renewables: "talking 'bout my generation"

edited 19 December 2019 at 11:25PM in Green & ethical MoneySaving
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  • Martyn1981Martyn1981 Forumite
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    OK end of March. Shall I go first to make everyone else feel better?

    System: 3.58kWp

    Total generation: 264kWh

    Generation per kWp: 73.74kWh

    Go on then wheel out the big guns!

    Mart.
    Mart. Cardiff. 5.58 kWp PV systems (3.58 ESE & 2.0 WNW)

    For general PV advice please see the PV FAQ thread on the Green & Ethical Board.
  • edited 1 April 2012 at 2:52PM
    GaryMo_2GaryMo_2 Forumite
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    edited 1 April 2012 at 2:52PM
    Hardly a big gun but a great month for generation, especially the latter end.
    PVGIS estimated figures for March were 262kWh, my generation figures ended up at 385kWh so much higher than anticipated at 147%

    My system on PVOutput

    Record day was 26th March with 23.47kWh
    Worst day was 9th March with 1.8kWh
    Average for March is 12.423kWh
    Generation per kWp - 96.25kWh

    26_03_12.jpg
    16 x 250W JA Solar Panels (JAM6-60-250) : Fronius IG TL 3.6 Inverter : South Facing : 28 Degree Pitch : No Shading : Manchester M46
  • seagull09 wrote: »
    Indeed it does:

    (light green is Today, dark green was Thursday - MSE auto-resize makes the image a bit small)

    What happened at 11:00am on Thursday? The steep rise? Cloud/mist burning off? Or is that when some physical shading ends?
    Cider Country Solar PV generator: 3.7kWp Enfinity system on unshaded SE (-36deg azimuth) & 45deg roof
  • edited 31 March 2012 at 9:28PM
    EricMearsEricMears Forumite
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    edited 31 March 2012 at 9:28PM
    Well I haven't been able to report the bumper individual days others have - my best was 20.77kwh on the 27th - but monthly total is fairly respectable :-
    From SB logs
    01/03/2012 00:00 1248.575
    31/03/2012 19:25 1617.29
    March Gen 368.7kwh
    (92kwh per installed kwp)
    I don't actually remember seeing the sun at all today but still managed 5.28kwh.
    Roll on April May, June & July - every one of them ought to be better than March and of course my shallow slope gets less of a handicap.

    Cashwise, my £12k left in the ISA would have earned £420 in a full year or around £35 per month. March (containing an equinox day) should be an average month but I seem to have earned over £160 (getting on for 5 times as much).
    NE Derbyshire.
    4kWp S Facing 17.5deg slope (dormer roof).
    BEV : Nissan Leaf e+
  • KevinGKevinG Forumite
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    Martyn1981 wrote: »
    OK end of March. Shall I go first to make everyone else feel better?

    System: 3.58kWp

    Total generation: 264kWh

    Generation per kWp: 73.74kWh

    Go on then wheel out the big guns!

    Mart.
    Mine works out as 101.52 kWh/kWP for March.

    Here I am on pvoutput.
    Baxi Ecogen 24/1.0 Micro-CHP boiler installed Oct-2010; 2kWp Solar PV - 10*200W Kioto, SMA Sunny Boy 2000HF, SSE facing, some shading in winter, 37° pitch, installed Jun-2011, inverter replaced Sep-2017 AND Feb-2022.
  • I see a very similar kink in our graph in the afternoon when the whole pv array is shaded by the sun moving westward.

    How did your output compare to PVGIS? I guess PVGIS can't account for shading, so it would be interesting to see how it compares?

    I'll be uploading my stats tomorrow evening, but I know we'd beaten PVGIS by 25% as of Wednesday lunchtime.:j
    Cider Country Solar PV generator: 3.7kWp Enfinity system on unshaded SE (-36deg azimuth) & 45deg roof
  • edited 1 April 2012 at 8:27PM
    EricMearsEricMears Forumite
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    edited 1 April 2012 at 8:27PM
    Certainly has been for us !

    I've just looked at all my (7.5) months outputs. To break even with leaving our £12k in an ISA, we need to earn £35 per month which was (until this morning) 78kwh / month.

    The only month so far in which we didn't do that was December - and even that was 77.8 so we weren't really much out of pocket even then (9 pence ! )

    Actual monthly results were :-
    . . . . . . . . . . . . . . . . . . . . . . . . pvgis
    Aug (15 days) 184 . . . . . . . . . . .390 (full month)
    Sep 347 . . . . . . . . . . .. . . . . . . .296
    Oct 262 . . . . . . . . . . . . . . . . . . . 195
    Nov 100 . . . . . . . . . . . . . . . . . . . 100
    Dec 77 . . . . . . . . . . . . . . . . . . . . 63.5
    Jan 107 . . . . . . . . . . . . . . . . . . . 91.5
    Feb 170 . . . . . . . . . . . . . . . . . . 149
    Mar 363 . . . . . . .. . . . . . . . . . . . 250



    excluding Aug :-

    Month . Act . . Pred . %inc rel to pred
    Sep . . 347 . . 296 . . 17.23
    Oct . . 262 . . 195 . . 34.36
    Nov . . 100 . . 100 . . 0.00
    Dec . . 77 . . 63.5 . . 21.26
    Jan . . 107 . . 91.5 . . 16.94
    Feb . . 170 . . 149 . . 14.09
    Mar . . 363 . . 250 . . 45.20

    Year . . 1426 . .1145 . . 24.54
    NE Derbyshire.
    4kWp S Facing 17.5deg slope (dormer roof).
    BEV : Nissan Leaf e+
  • KenSKenS Forumite
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    System: 3.50kWp

    Total generation for March: 347kWh

    Generation per kWp: 99.20kWh
    3.50 kWp : 14 x 250W Sanyo NU-R250-J5 : Diehl Ako 3800S Inverter : South Facing : No Shading : Hertfordshire WD3
  • March was a corker here in cider country. PVGIS estimate was 244kWh and we generated 365.1kWh, so 50% above estimate. That equates to 98.7kWh/kWp.

    This was despite a rubbish week in the middle where we barely saw the sun for 5 days and only made 17kWh in that period. The last 2 weeks more than made up for it, we only had 2 days in the that period when we didn't break into double figures (and one of those was a 9.9kWh). We set 4 new records during the course of the month.

    Until March we were running about 25% ahead of PVGIS. I need to crunch the numbers tomorrow to see how we're doing taking March into account.

    April started off today with a new record at 22.155kWh which at the old FIT rates would have been just under £10, but with the uprating it was our first £10+ day at £10.39 (rounding down to 22.1kWh).
    Cider Country Solar PV generator: 3.7kWp Enfinity system on unshaded SE (-36deg azimuth) & 45deg roof
  • edited 2 April 2012 at 4:15PM
    Kernel_SandersKernel_Sanders Forumite
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    edited 2 April 2012 at 4:15PM
    seagull09 wrote: »
    I expect if it was possible to get a nice cold breeze and a cloudless sky at this time of year, records would be broken.
    This would be more likely in late June, although it depends on your proximity to due south and your pitch. Cold days are not unheard of at that time; remember that day in early August? (Max 12°C in Mansfield!)
    KevinG wrote: »
    completely smashed any period in the whole of last summer and now exceeded March PVGIS by 53%. :j
    This demonstrates just what an incredibly unusual March fortnight we have just enjoyed.



    Saturday's dismal performance was actually quadrupled on Sunday, giving me an unexpected record of 22.08 kWh.
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