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So now I have a solar PV system how do I make the most of it???

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  • orrery
    orrery Posts: 833 Forumite
    Part of the Furniture 500 Posts Name Dropper Photogenic
    zeupater wrote: »
    Mine's quite accurate, displays down to 50W and seems to be pretty good at that level too as individual low power devices such as a CFL have the expected effect on the display.

    I've been in contact with Owl. Their response is as follows:

    The device needs a background load of at least 40W to function properly. Accuracy is completely unspecified below 1A (essentially below 240W). Once up into a usable band, it can discriminate down to 14W changes.
    4kWp, Panels: 16 Hyundai HIS250MG, Inverter: SMA Sunny Boy 4000TLLocation: Bedford, Roof: South East facing, 20 degree pitch20kWh Pylontech US5000 batteries, Lux AC inverter,Skoda Enyaq iV80, TADO Central Heating control
  • Otis_VR
    Otis_VR Posts: 8 Forumite
    orrery wrote: »
    I've been in contact with Owl. Their response is as follows:

    The device needs a background load of at least 40W to function properly. Accuracy is completely unspecified below 1A (essentially below 240W). Once up into a usable band, it can discriminate down to 14W changes.

    Thanks for sharing. That's good to know.

    I had pretty well disgarded all my night-time readings of 0.084kW after which I found I was within 5% of the generation meter readings, so this makes sense.
  • zeupater
    zeupater Posts: 5,390 Forumite
    Part of the Furniture 1,000 Posts Name Dropper Combo Breaker
    edited 30 November 2011 at 5:02PM
    orrery wrote: »
    What is the normal spread on specific annual yield? This isn't a measure that I've got my head round yet.

    My Sunny Delight is telling me that I've achieved about 300 kWh/kWp which is strangely different to the figure you quote, and we've only been up and running for a few weeks. I've just checked and I've got the kWp set correctly.
    Hi

    Have you used PVGIS to estimate your monthly targets ? .... (http://re.jrc.ec.europa.eu/pvgis/apps4/pvest.php) ... use the Climate SAF PVGIS dataset ...

    The calculation of the output looks a little high .... if you have a 4kWp system then 300kWh/kWp would mean that you've produced 1200kWh in the couple of weeks you've had it .... can we all move to your back garden and bring our panels with us please ? :D ..... depending on your particular setup you would normally expect somewhere around 1kWh/kWp per day for the last couple of weeks and less than that with the cloud cover we've had recently, therefore a 4kWp would likely have recently been averaging ~3kWh/day.

    HTH
    Z
    "We are what we repeatedly do, excellence then is not an act, but a habit. " ...... Aristotle
    B)
  • Cardew
    Cardew Posts: 29,061 Forumite
    Part of the Furniture 10,000 Posts Name Dropper Rampant Recycler
    Otis_VR wrote: »
    Postscript:

    the OWL unit is reading well over 2300 kW production, which is nearly double the previous recorded peak of 1300kW.

    WOW!

    Drop the 'k' please;)
  • Otis_VR
    Otis_VR Posts: 8 Forumite
    Cardew wrote: »
    WOW!

    Drop the 'k' please;)

    Good spot, duly noted.

    I know what I meant - my brain and fingers had other ideas :-)
  • jackieblack
    jackieblack Posts: 10,501 Forumite
    Part of the Furniture 10,000 Posts Name Dropper Photogenic
    November generation, big drop from October (as to be expected)

    75.7 kWh projected, 86 kWh generated (up 11% on Nov 2010 generation)

    Total generation (since installation) still running at just over 122% of predicted figures.
    2.22kWp Solar PV system installed Oct 2010, Fronius IG20 Inverter, south facing (-5 deg), 30 degree pitch, no shading
    Everything will be alright in the end so, if it’s not yet alright, it means it’s not yet the end
    MFW #4 OPs: 2018 £866.89, 2019 £1322.33, 2020 £1337.07
    2021 £1250.00, 2022 £1500.00, 2023 £1500, 2024 £1350
    2025 target = £1200, YTD £9190
    Quidquid Latine dictum sit altum videtur
  • orrery
    orrery Posts: 833 Forumite
    Part of the Furniture 500 Posts Name Dropper Photogenic
    zeupater wrote: »
    .... can we all move to your back garden and bring our panels with us please ? :D .....

    Are you bringing the beer?
    4kWp, Panels: 16 Hyundai HIS250MG, Inverter: SMA Sunny Boy 4000TLLocation: Bedford, Roof: South East facing, 20 degree pitch20kWh Pylontech US5000 batteries, Lux AC inverter,Skoda Enyaq iV80, TADO Central Heating control
  • orrery
    orrery Posts: 833 Forumite
    Part of the Furniture 500 Posts Name Dropper Photogenic
    jackieblack wrote: »
    75.7 kWh projected, 86 kWh generated (up 11% on Nov 2010 generation)

    What are using as your projected figures?
    4kWp, Panels: 16 Hyundai HIS250MG, Inverter: SMA Sunny Boy 4000TLLocation: Bedford, Roof: South East facing, 20 degree pitch20kWh Pylontech US5000 batteries, Lux AC inverter,Skoda Enyaq iV80, TADO Central Heating control
  • jackieblack
    jackieblack Posts: 10,501 Forumite
    Part of the Furniture 10,000 Posts Name Dropper Photogenic
    orrery wrote: »
    What are using as your projected figures?
    IIRC I got them from a website that Zeupater (I think) recommended, but it was so long ago now I can't remember exactly... I remember having to input various info and then I just copy & pasted the results into my spreadsheet (:o)
    2.22kWp Solar PV system installed Oct 2010, Fronius IG20 Inverter, south facing (-5 deg), 30 degree pitch, no shading
    Everything will be alright in the end so, if it’s not yet alright, it means it’s not yet the end
    MFW #4 OPs: 2018 £866.89, 2019 £1322.33, 2020 £1337.07
    2021 £1250.00, 2022 £1500.00, 2023 £1500, 2024 £1350
    2025 target = £1200, YTD £9190
    Quidquid Latine dictum sit altum videtur
  • Yut_Man
    Yut_Man Posts: 139 Forumite
    This is what I used to get a predicted monthly forcast. Ive only been running 1 month so very early to say how accurate it is. But im 20% above there forcast. http://www.solarguide.co.uk/solar-pv-calculator#bestresult
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