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  • FIRST POST
    • Kernel Sanders
    • By Kernel Sanders 16th Mar 12, 12:06 AM
    • 3,055Posts
    • 1,271Thanks
    Kernel Sanders
    Renewables: "talking 'bout my generation"
    • #1
    • 16th Mar 12, 12:06 AM
    Renewables: "talking 'bout my generation" 16th Mar 12 at 12:06 AM
    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 7:01 PM.
Page 890
    • old grouser
    • By old grouser 19th Apr 17, 2:06 PM
    • 174 Posts
    • 900 Thanks
    old grouser
    4.25 ish O's today.......still waiting for a/an Hawaii
    Originally posted by legoman62
    Poor Legoman! It must be terrible living north of Watford!

    5.9 Os yesterday, though only 2 Os on Monday - but it rained! (overnight!)
    Today is looking promising - nearly four Os before lunch
    "and all the clouds that lour'd upon our house
    In the deep bosom of the ocean buried."

    More seriously,a bit more data analysis, relating to Maiden Days (i.e. those Hawaiis that went to 6 Os or beyond). If the Hawaii season is Feb-Oct, and there is roughly equal distribution before and after 30th June (see my last post), the distribution is much less equal for Maidens. In my case, since July 2011, the distribution is 102 in the first half of the year, but only 62 in the second half. (I realise that the figures are possibly slightly distorted because the figures run from August 2011 to March 2017, so four months of one year (this one!) are missing). The 'Maiden' scores (for quite a bit south of Watford) are March 13; April 28; May 37; June 24; July 35; August 16; September 11. I think that this is where I got my impression that the first half of the year is quite a bit sunnier than the second half. Our most productive day so far was in mid-May (just under the elusive 7 Os, which no doubt has a name).
    Last edited by old grouser; 19-04-2017 at 3:24 PM. Reason: reference added for clarity
    O G Somewhere on the South Downs
    3.29kWp S by E
    Greetings to Druids everywhere
    • countryman
    • By countryman 19th Apr 17, 8:17 PM
    • 363 Posts
    • 2,348 Thanks
    countryman
    3.95 O's today ...
    4kw PV fitted 4th July 2014 (Green Energy NW £5600). WSW facing, 30 deg Pitch, Unshaded, Samil Solar River inverter, 16 Solar World Mono panels, Iboost on Immersion Heater. located in mid Lincolnshire.
    • Oscargrouch
    • By Oscargrouch 19th Apr 17, 8:38 PM
    • 2,682 Posts
    • 12,696 Thanks
    Oscargrouch
    Party Time.. A/an Hawaii + 04 O's......
    2.5 kWp PV system, SSW facing, 45 Deg Roof. ABB Inverter, Monitor: 'Wattson'.
    Reg. for FIT Nov 2011. Northants. "It's not what you generate; it's how you use it that matters".

    Definition of 'O's = kWh/kWp (kWh = your daily & accurate Generation figure) (kWp = the rated output of your PV Panels).
    • Crowmann
    • By Crowmann 19th Apr 17, 9:05 PM
    • 64 Posts
    • 291 Thanks
    Crowmann
    Poor Legoman! It must be terrible living north of Watford!

    5.9 Os yesterday, though only 2 Os on Monday - but it rained! (overnight!)
    Today is looking promising - nearly four Os before lunch
    "and all the clouds that lour'd upon our house
    In the deep bosom of the ocean buried."

    More seriously,a bit more data analysis, relating to Maiden Days (i.e. those Hawaiis that went to 6 Os or beyond). If the Hawaii season is Feb-Oct, and there is roughly equal distribution before and after 30th June (see my last post), the distribution is much less equal for Maidens. In my case, since July 2011, the distribution is 102 in the first half of the year, but only 62 in the second half. (I realise that the figures are possibly slightly distorted because the figures run from August 2011 to March 2017, so four months of one year (this one!) are missing). The 'Maiden' scores (for quite a bit south of Watford) are March 13; April 28; May 37; June 24; July 35; August 16; September 11. I think that this is where I got my impression that the first half of the year is quite a bit sunnier than the second half. Our most productive day so far was in mid-May (just under the elusive 7 Os, which no doubt has a name).
    Originally posted by old grouser
    Cooler panels is the reason - more sunshine but warmer panels in the later part of the summer.

    Mu peak month is from PVGIS May although last year July and August smashed their targets so in reality they achieved more.

    Still to get a Maiden the is year - today 5.85 O's
    4.2 kw - 16 265w panels South facing, 45 degrees, West Norfolk.
    • legoman62
    • By legoman62 19th Apr 17, 9:24 PM
    • 2,052 Posts
    • 10,398 Thanks
    legoman62
    3.4 O's on the cold E. coast.....where I'm not, at the minute
    E Coast. 16 Sanyo Hit 250s.4kWp SMA 3.8kWp inverter. SW roof. 28° pitch.
    Minimal shade. Nov 2011 install. N.E Lincs Coast. Hybrid car
    • defaultdriver
    • By defaultdriver 19th Apr 17, 10:13 PM
    • 139 Posts
    • 712 Thanks
    defaultdriver
    5.04 O's today. On target for this Month.
    3.99KW SunEdison (14 * 285W), Solis inverter, iBoost, Herts, roughly SW facing
    • Martyn1981
    • By Martyn1981 20th Apr 17, 6:56 AM
    • 5,573 Posts
    • 9,581 Thanks
    Martyn1981
    No Hawaii's in sight yet for me, but did get a 4.5 O's day yesterday, and on course for 107% this month.
    Just 'call me 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.
    • ASavvyBuyer
    • By ASavvyBuyer 20th Apr 17, 7:41 AM
    • 418 Posts
    • 1,081 Thanks
    ASavvyBuyer
    Just 2.89 O's up in the valleys yesterday.

    But currently forecast to achieve 108% of PVGIS estimate for the month, because of the good start to the month.
    Rhondda Cynon Taf, 4kWp, W roof, 30° pitch, 16 x 8.33 Eternity 250w E+10 panels, Solar Edge SE4000-16A Inverter + P300 Optimisers & REUK Diverter
    + Toshiba RAS-10G2KVP-E Ultra High Efficiency Air Conditioner/Heat Pump
    • theboylard
    • By theboylard 20th Apr 17, 7:45 AM
    • 1,097 Posts
    • 2,699 Thanks
    theboylard
    Just shy of a maiden yesterday, so close!

    Also bought a pressure washer from Aldi, lived here for 17 years and we never knew we had coloured patio slabs!!
    4kWp, SSE, 16 x 250w EcoFuture BoB with retro-fitted SolarEdge P300 optimisers & SE3500 Inverter, in occasionally sunny Corby, Northants.
    • Markj1110
    • By Markj1110 20th Apr 17, 8:53 AM
    • 731 Posts
    • 4,798 Thanks
    Markj1110
    4.94 O's yesterday.
    3.96 kWp System, SSE Facing, 30 Degree Pitch, 12 x 330W BenQ Panels, Solar Edge Inverter, Lincoln, Lincolnshire. Installed 26th May 2015.
    • countryman
    • By countryman 20th Apr 17, 9:24 PM
    • 363 Posts
    • 2,348 Thanks
    countryman
    ... 2.2 O's today ...
    4kw PV fitted 4th July 2014 (Green Energy NW £5600). WSW facing, 30 deg Pitch, Unshaded, Samil Solar River inverter, 16 Solar World Mono panels, Iboost on Immersion Heater. located in mid Lincolnshire.
    • Oscargrouch
    • By Oscargrouch 20th Apr 17, 9:30 PM
    • 2,682 Posts
    • 12,696 Thanks
    Oscargrouch
    Less than 1/2 a/an Hawaii today; sat at 2.04 O's...
    2.5 kWp PV system, SSW facing, 45 Deg Roof. ABB Inverter, Monitor: 'Wattson'.
    Reg. for FIT Nov 2011. Northants. "It's not what you generate; it's how you use it that matters".

    Definition of 'O's = kWh/kWp (kWh = your daily & accurate Generation figure) (kWp = the rated output of your PV Panels).
    • old grouser
    • By old grouser 20th Apr 17, 9:43 PM
    • 174 Posts
    • 900 Thanks
    old grouser
    5.1 Os today, and the wind was extremely cold at ground level. I take the point about the panels being cooler in the first half of the year! But is it the whole story?
    O G Somewhere on the South Downs
    3.29kWp S by E
    Greetings to Druids everywhere
    • legoman62
    • By legoman62 20th Apr 17, 10:04 PM
    • 2,052 Posts
    • 10,398 Thanks
    legoman62
    2.65 O's there today....still no Hawaii
    E Coast. 16 Sanyo Hit 250s.4kWp SMA 3.8kWp inverter. SW roof. 28° pitch.
    Minimal shade. Nov 2011 install. N.E Lincs Coast. Hybrid car
    • Merlin139
    • By Merlin139 20th Apr 17, 10:19 PM
    • 4,170 Posts
    • 17,447 Thanks
    Merlin139
    3.14 O's

    2/3's in to the month now at 79% of Estimate.

    Long may it continue.
    • ASavvyBuyer
    • By ASavvyBuyer 21st Apr 17, 6:54 AM
    • 418 Posts
    • 1,081 Thanks
    ASavvyBuyer
    2.83 O's for yesterday.
    Rhondda Cynon Taf, 4kWp, W roof, 30° pitch, 16 x 8.33 Eternity 250w E+10 panels, Solar Edge SE4000-16A Inverter + P300 Optimisers & REUK Diverter
    + Toshiba RAS-10G2KVP-E Ultra High Efficiency Air Conditioner/Heat Pump
    • Martyn1981
    • By Martyn1981 21st Apr 17, 7:38 AM
    • 5,573 Posts
    • 9,581 Thanks
    Martyn1981
    5.1 Os today, and the wind was extremely cold at ground level. I take the point about the panels being cooler in the first half of the year! But is it the whole story?
    Originally posted by old grouser
    Hiya, it's probably the largest part of the story as temps here have been very low the last few days. The other boosts are that April can have very clear skies, and depending on your roof pitch might be about the best angle as winter sun is too low, and summer sun too high, but April (and October) ... Goldilocks!
    Just 'call me 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.
    • Markj1110
    • By Markj1110 21st Apr 17, 10:35 AM
    • 731 Posts
    • 4,798 Thanks
    Markj1110
    2.11 O's yesterday.
    3.96 kWp System, SSE Facing, 30 Degree Pitch, 12 x 330W BenQ Panels, Solar Edge Inverter, Lincoln, Lincolnshire. Installed 26th May 2015.
    • defaultdriver
    • By defaultdriver 21st Apr 17, 12:04 PM
    • 139 Posts
    • 712 Thanks
    defaultdriver
    3.07 O's yesterday and at 72%
    3.99KW SunEdison (14 * 285W), Solis inverter, iBoost, Herts, roughly SW facing
    • Merlin139
    • By Merlin139 21st Apr 17, 7:31 PM
    • 4,170 Posts
    • 17,447 Thanks
    Merlin139
    3.78 O's today.

    What could it have been?

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