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Batteries and saving sessions

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  • 94JDH
    94JDH Posts: 146 Forumite
    Fourth Anniversary 100 Posts Name Dropper
    Thursday's one just over £25
    PV total 19.8 kW system:
    23 x 420W East/West split over two flat roof areas at 10 degrees inclination.
    13 x 390W South spit over two flat roof areas at 5 to 20 degrees inclination.
    6 x 390W south wall mounted at 90 degrees inclination.
    7 x 390W West wall mounted at 90 degrees inclination.
    2 x 5 kW hybrid inverters
    4 x 9.5 kWh batteries (38 kWh total)
  • EricMears
    EricMears Posts: 3,309 Forumite
    Part of the Furniture 1,000 Posts Name Dropper
    So your savings were about 1/3rd of what you used during that period, do you know what your average usage was during that period on previous days?
    No 'average' but FWIW it was 0.3kWh between 9&10 this morning but only 0.1 last Friday.  It's usually a pretty low demand hour or if sun is shining can even be zero.
    NE Derbyshire.4kWp S Facing 17.5deg slope (dormer roof).24kWh of Pylontech batteries with Lux controller BEV : Hyundai Ioniq5
  • Oscarmax
    Oscarmax Posts: 183 Forumite
    100 Posts Second Anniversary Name Dropper Photogenic
    To date with Octopus I have now accumulated 8 point value 1 pence
    12 x 370 Watt J A panels Solis 3.6 invertor. Solax AC invertor and 5.8 triple battery
  • I'm waiting for octopus to calculate for the 24th, i got about 18 quid for the 23rd, still waiting for actual figures of what I saved but I can work it out from the octopoints...
  • Oscarmax said:
    To date with Octopus I have now accumulated 8 point value 1 pence
    On the saving session on 23/01 I used 0.0000 kWh and still got a red thumbs down octopus  :*
    3.995kWP SSW facing. Commissioned 7 July 2011. 24 degree pitch (£3.36 /W).
    17 Yingli 235 panels
    Sunnyboy 4000TL inverter
    Sunny Webox
    Solar Immersion installed May 2013, after two Solar Immersion lasting just over the guarantee period replaced with Solic 200... no problems since.

    13 Feb 2020 LUX AC 3600 and 3 X Pylon Tech 3.5 kW batteries added...

    20 January 2024 Daikin ASHP installed
  • michaels
    michaels Posts: 29,122 Forumite
    Part of the Furniture 10,000 Posts Photogenic Name Dropper
    Are Octopus capping the per session or total payout?
    I think....
  • michaels said:
    Are Octopus capping the per session or total payout?
    I hope not! My savings were less than i expected so i guess the IDA does not carry as much weight as expected, ive checked my figures for the 2 weeks previous...
  • EricMears
    EricMears Posts: 3,309 Forumite
    Part of the Furniture 1,000 Posts Name Dropper
    There are a number of comments above from people who clearly don't understand the algorithm and have made little attempt to do so !

    It's NOT 'cheating' to use the 'In Day Adjustment' to maximise benefits ! Without doing that, few would receive any worthwhile payments so many would just ignore the scheme as not being worth the effort of taking part ; I certainly wouldn't bother rearranging meal times and rushing around the house to switch larger consuming items on and off for the sake of a few pence 'reward'. The grid stands to incur huge charges for starting up coal & gas plants without help from the public so paying a few pounds to cooperative consumers is well worthwhile.
    NE Derbyshire.4kWp S Facing 17.5deg slope (dormer roof).24kWh of Pylontech batteries with Lux controller BEV : Hyundai Ioniq5
  • The octopus FAQ page actually says people should use more in the period before:

    What should you do to avoid this?

    Try to shift more of your peak energy to before the Session – e.g. try to run the washing and cook earlier rather than later – and avoid switching everything off hours ahead of time.


    They also have this ...

    Couldn’t I just game the system by using much more power before the Session?

    We can’t blame you for wondering! But the cost of using much more energy every day over Winter just so you can earn more during a few hours of Saving Sessions just wouldn’t add up favourably in the end.


    I dont understand how they work out my savings though, for example my average usage in the 2 weeks before the 23rd 5-6pm was 1.059kwh... in the 3 hour IDA period on the 23rd i used 16.7kwh... my saving equated to 5.44kwh (i think), as i was running on battery during the saving session time so usage should have been zero.

    Can anyone work it out??

  • EricMears
    EricMears Posts: 3,309 Forumite
    Part of the Furniture 1,000 Posts Name Dropper

    They also have this ...

    Couldn’t I just game the system by using much more power before the Session?

    We can’t blame you for wondering! But the cost of using much more energy every day over Winter just so you can earn more during a few hours of Saving Sessions just wouldn’t add up favourably in the end.

    Their 'reply' doesn't really answer the question !

    Of course it would cost a lot to "use much more energy every day over Winter" but that isn't what was asked.  Using much more energy during the 3 hour 'adjustment period" would cost far less than the 'reward' that probably results.
    NE Derbyshire.4kWp S Facing 17.5deg slope (dormer roof).24kWh of Pylontech batteries with Lux controller BEV : Hyundai Ioniq5
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