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  • FIRST POST
    • Kernel Sanders
    • By Kernel Sanders 15th Mar 12, 11:06 PM
    • 3,437Posts
    • 1,411Thanks
    Kernel Sanders
    Renewables: "talking 'bout my generation"
    • #1
    • 15th Mar 12, 11:06 PM
    Renewables: "talking 'bout my generation" 15th Mar 12 at 11:06 PM
    Please forgive the corny thread title inspired by The Who, but this post on the bloated 'how do I make the most of it' thread prompted me to initiate a new one...
    Hi Everyone,
    I haven't been here for a while, and am interested to see discussion of how much is being generated, rather than what to do with it.
    Originally posted by old grouser
    Well, there was yet another misty and bleak start in North Notts today (Thursday), but my SSW 3.92 kWp system was generating around 3kW for just a few minutes between 12.15 and 13.00, but enough to get the immersion heater hot enough for a shower. It seems to drop below that figure before it reaches 13.55 (optimum orientation). Final figure was just over 14kWh.

    BTW, there was an item about solar generation in Germany on the radio today; you can stream it here:
    http://www.bbc.co.uk/iplayer/episode/b01d2rvn/PM_15_03_2012/
    Just click on the speaker symbol on the left, then drag the time cursor at the bottom to 25mins 30 secs then release.
    Last edited by Kernel Sanders; 19-12-2012 at 6:01 PM.
Page 1116
    • Kernel Sanders
    • By Kernel Sanders 14th Mar 19, 9:28 PM
    • 3,437 Posts
    • 1,411 Thanks
    Kernel Sanders
    So, the readings at 6.30am this morning when it was the pre-dawn half light and my 5.2kWp system was generating 12 watts:

    Yesterday 23.2kWh
    Today 3.9 kWh

    (4.46 O and 0.75 O respectively)

    I think the internal clock (if it has one) or whatever defines where "today" starts and ends may need some attention, as there's no way it generated 3.9kWh from midnight to 0630 today. Time to read some more of the manual when I get home from work later ...
    Originally posted by onomatopoeia99
    Would it be roughly correct if the time had been set (by default) to midnight at the moment of its commissioning? That would be indicative of the electrician forgetting to set the clock - unless, of course, you misread it and it was really 39 Watt hours

    Don't you have the generation meter fitted as well i.e. the one the meter reader is going to look at? The reading at this time tomorrow minus the reading now will give tomorrow's total.
    Last edited by Kernel Sanders; 14-03-2019 at 9:35 PM.
    • Coastalwatch
    • By Coastalwatch 14th Mar 19, 10:11 PM
    • 530 Posts
    • 2,136 Thanks
    Coastalwatch
    Dismal wet morning, only 0.25 O's by 10 am. Then broken sunshine mixed with swift moving clouds finally clearing to return 3.48 O's.
    East coast, lat 51.97. 8.26kw SSE, 23 pitch + 0.59kw WSW vertical. Nissan Leaf plus one dirty diesel. Still waiting for V2H and home storage to become available at sensible cost.
    • Cottage Economy
    • By Cottage Economy 15th Mar 19, 8:43 AM
    • 1,042 Posts
    • 4,198 Thanks
    Cottage Economy
    Now I have my system in place I can start recording readings.

    Alternate sunshine and showers yesterday but reached 3.75 O's by the end of the day.
    'Save 12k in 2018' 1000/7,000 (14%)

    6kWp system, 20 x 300W Q Cells panels with a Solis 6.0 inverter and iBoost on south facing barns, South Lincs
    • mmmmikey
    • By mmmmikey 15th Mar 19, 9:28 AM
    • 215 Posts
    • 318 Thanks
    mmmmikey
    Morning all - quick favour to ask if I may as I don't have enough data of my own yet.....


    Could you let me know how your generation this February compared (in % terms or using whatever numbers you've got) with last February (& ideally the year before)?


    I don't want to make any false assumptions based on this years generation during an unseasonally warm (but not necessarily sunny????) February.


    Thanks, Mike
    • Martyn1981
    • By Martyn1981 15th Mar 19, 11:13 AM
    • 8,406 Posts
    • 13,275 Thanks
    Martyn1981
    Could you let me know how your generation this February compared (in % terms or using whatever numbers you've got) with last February (& ideally the year before)?

    Thanks, Mike
    Originally posted by mmmmikey
    Hi Mike. My target for Feb is off PVGIS, and although I have some shading, I use the 'whole' number as my reference point, I don't use a lower target.

    Year - Feb - whole year %

    2015 - 107% - 106%
    2016 - 117% - 102%
    2017 - 74% - 99%
    2018 - 142% - 104%
    2019 - 129%
    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.
    • KevinG
    • By KevinG 15th Mar 19, 1:35 PM
    • 1,473 Posts
    • 4,132 Thanks
    KevinG
    Could you let me know how your generation this February compared (in % terms or using whatever numbers you've got) with last February (& ideally the year before)?
    Originally posted by mmmmikey
    Taking this year as 100% I get:

    2018: 104%
    2017: 55%
    2016: 71%
    2015: 65%
    2014: 74%
    2013: 63%
    2012: 85%

    So 2019 was the second best February.
    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.
    • onomatopoeia99
    • By onomatopoeia99 15th Mar 19, 3:03 PM
    • 5,535 Posts
    • 12,690 Thanks
    onomatopoeia99
    Would it be roughly correct if the time had been set (by default) to midnight at the moment of its commissioning? That would be indicative of the electrician forgetting to set the clock - unless, of course, you misread it and it was really 39 Watt hours

    Don't you have the generation meter fitted as well i.e. the one the meter reader is going to look at? The reading at this time tomorrow minus the reading now will give tomorrow's total.
    Originally posted by Kernel Sanders

    I found the clock setting and it's correct. I don't think I misread the generation figures, but I'll put it down to being too early in the morning for the brain to be working.


    2.6 O yesterday. Only 0.22 so far today, but it has been thick cloud all day.
    INTP, nerd, libertarian and scifi geek. Home is where my books are.

    5.2kWp system, SE facing, >1% shading, installed March 2019.
    • Zarch
    • By Zarch 15th Mar 19, 5:00 PM
    • 254 Posts
    • 600 Thanks
    Zarch
    Best day of the year so far with 3.89 O for 152% of daily PVGIS.
    5.1kWp system, 17 x 300w JA panels, full 3680 SolarEdge in Sunny Sheffield.
    3 x NE, 14 x SW at various pitches on multiple aspects on PVOutput. (Sept 2018)
    Join Octopus Energy via my referral link. We both get 50 credit.
    Check out my Octopus Energy Agile Tariff analysis website.
    • Coastalwatch
    • By Coastalwatch 15th Mar 19, 7:20 PM
    • 530 Posts
    • 2,136 Thanks
    Coastalwatch
    Best day of the year so far with 3.89 O for 152% of daily PVGIS.
    Originally posted by Zarch
    That's obscene! 1.13 O's here today.
    East coast, lat 51.97. 8.26kw SSE, 23 pitch + 0.59kw WSW vertical. Nissan Leaf plus one dirty diesel. Still waiting for V2H and home storage to become available at sensible cost.
    • legoman62
    • By legoman62 15th Mar 19, 7:39 PM
    • 2,748 Posts
    • 14,302 Thanks
    legoman62
    Not up to yesterdays total but still 2.175 O's here today
    16 Sanyo Hit 250s.4kWp SMA 3.8kWp inverter. SW roof. 28 pitch.
    Minimal shade. Nov 2011 install. N.E Lincs Coast. Hybrid car
    • Oscargrouch
    • By Oscargrouch 15th Mar 19, 9:47 PM
    • 3,324 Posts
    • 16,306 Thanks
    Oscargrouch
    I found the clock setting and it's correct. I don't think I misread the generation figures, but I'll put it down to being too early in the morning for the brain to be working.
    2.6 O yesterday. Only 0.22 so far today, but it has been thick cloud all day.
    Originally posted by onomatopoeia99
    Suggest that you speak with your installer with regards to the anomaly your experiencing with night time generation.
    That's obscene! 1.13 O's here today.
    Originally posted by Coastalwatch
    Another, but not quite the obscene result for me..3.48 O's.....
    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

    Definition of 'O's = kWh/kWp (kWh = your daily & accurate Generation figure) (kWp = the rated output of your PV Panels).
    • mmmmikey
    • By mmmmikey 16th Mar 19, 8:49 AM
    • 215 Posts
    • 318 Thanks
    mmmmikey
    Thanks for responses to earlier post re: Feb generation - helps me plan water heating / battery charging
    • onomatopoeia99
    • By onomatopoeia99 16th Mar 19, 10:53 AM
    • 5,535 Posts
    • 12,690 Thanks
    onomatopoeia99
    0.42 O yesterday in the end, don't think today will be much better, nothing but thick cloud around from horizon to horizon.
    INTP, nerd, libertarian and scifi geek. Home is where my books are.

    5.2kWp system, SE facing, >1% shading, installed March 2019.
    • legoman62
    • By legoman62 16th Mar 19, 5:22 PM
    • 2,748 Posts
    • 14,302 Thanks
    legoman62
    1.8 O's here today. Generator said goodnight at 16.45
    16 Sanyo Hit 250s.4kWp SMA 3.8kWp inverter. SW roof. 28 pitch.
    Minimal shade. Nov 2011 install. N.E Lincs Coast. Hybrid car
    • Cottage Economy
    • By Cottage Economy 16th Mar 19, 5:51 PM
    • 1,042 Posts
    • 4,198 Thanks
    Cottage Economy
    Ended up with 3.11 O's yesterday and a rather measly 0.92 today.

    But the scaffolding came down so I could admire the whole array in all of its glory. Even in the persisting rain 'tis a thing of beauty.
    'Save 12k in 2018' 1000/7,000 (14%)

    6kWp system, 20 x 300W Q Cells panels with a Solis 6.0 inverter and iBoost on south facing barns, South Lincs
    • Coastalwatch
    • By Coastalwatch 16th Mar 19, 7:30 PM
    • 530 Posts
    • 2,136 Thanks
    Coastalwatch
    A mainly overcast day with thin cloud cover at times enabling generation to reach 1.3 O's, so sufficient to keep the ASHP's running without fear of troubling the grid. Until dusk that is!
    East coast, lat 51.97. 8.26kw SSE, 23 pitch + 0.59kw WSW vertical. Nissan Leaf plus one dirty diesel. Still waiting for V2H and home storage to become available at sensible cost.
    • Oscargrouch
    • By Oscargrouch 16th Mar 19, 9:01 PM
    • 3,324 Posts
    • 16,306 Thanks
    Oscargrouch
    Ended up with 3.11 O's yesterday and a rather measly 0.92 today. But the scaffolding came down so I could admire the whole array in all of its glory. Even in the persisting rain 'tis a thing of beauty.
    Originally posted by Cottage Economy
    Unlike todays generation for me......0.64 O's..
    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

    Definition of 'O's = kWh/kWp (kWh = your daily & accurate Generation figure) (kWp = the rated output of your PV Panels).
    • Martyn1981
    • By Martyn1981 17th Mar 19, 7:23 AM
    • 8,406 Posts
    • 13,275 Thanks
    Martyn1981
    Poor week and month end predictions down to 94%, but the weather has now turned, good week ahead (fingers crossed) and just before 8am today I switched the ASHP on, the 1kW kettle on, and the computer, and was still exporting ....... getting there, getting there.
    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.
    • onomatopoeia99
    • By onomatopoeia99 17th Mar 19, 12:41 PM
    • 5,535 Posts
    • 12,690 Thanks
    onomatopoeia99
    Ended up with 0.78 O yesterday. Today should be better, was mostly sunny until noon, which is the side of the roof the panels are on (I have an L shaped bungalow, one side SE facing, one SW)
    INTP, nerd, libertarian and scifi geek. Home is where my books are.

    5.2kWp system, SE facing, >1% shading, installed March 2019.
    • onomatopoeia99
    • By onomatopoeia99 17th Mar 19, 4:51 PM
    • 5,535 Posts
    • 12,690 Thanks
    onomatopoeia99
    And today 3.9 O, the sun being out in the morning seems to make quite a difference, even if it's jolly cold outside today.
    INTP, nerd, libertarian and scifi geek. Home is where my books are.

    5.2kWp system, SE facing, >1% shading, installed March 2019.
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