• Slowness of feed-in-tariff payments

    From Clive Page@21:1/5 to All on Sun Jan 26 12:40:13 2025
    We've had solar panels on our roof for about a decade and signed up with
    EDF energy, our energy supplier at the time, to get the FIT payments.
    Until last year it all went smoothly, I read the meter every quarter,
    send in the reading via their website, and a payment came by bank
    transfer with a week or so. It was, in the long term, a reasonable
    return on our investment.

    About a year ago EDF changed to a new computer system which simply
    didn't work. They told us they couldn't make bank transfers any more
    and actually sent us a cheque for one quarter. They have now resumed
    bank transfers but instead of arriving right away, payments take nearly
    3 months and even the notification of payment takes weeks. When I
    complained they pointed out that this is permitted under their terms and conditions, which it is, but it's a big change from their past practice.

    I assume that as I had a free choice of which company to sell our solar electricity to in the first place, I could now switch to another one,
    somehow. But that would only be useful if I could find one that made
    payments more promptly. Are other energy companies just as slow?

    --
    Clive Page

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  • From The Other John@21:1/5 to Clive Page on Sun Jan 26 17:18:41 2025
    On 26/01/2025 12:40, Clive Page wrote:
    I assume that as I had a free choice of which company to sell our solar electricity to in the first place, I could now switch to another one, somehow.   But that would only be useful if I could find one that made payments more promptly.  Are other energy companies just as slow?

    I'm with Scottish Power and enter my solar readings every 90 days. They
    then pay into my bank in the last week of the month in which I enter it.
    No problems in the 12 years we've had the panels.

    --
    TOJ

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  • From wasbit@21:1/5 to Clive Page on Mon Jan 27 10:16:24 2025
    On 26/01/2025 12:40, Clive Page wrote:
    We've had solar panels on our roof for about a decade and signed up with
    EDF energy, our energy supplier at the time, to get the FIT payments.
    Until last year it all went smoothly, I read the meter every quarter,
    send in the reading via their website, and a payment came by bank
    transfer with a week or so.  It was, in the long term, a reasonable
    return on our investment.

    About a year ago EDF changed to a new computer system which simply
    didn't work.  They told us they couldn't make bank transfers any more
    and actually sent us a cheque for one quarter.  They have now resumed
    bank transfers but instead of arriving right away, payments take nearly
    3 months and even the notification of payment takes weeks.  When I complained they pointed out that this is permitted under their terms and conditions, which it is, but it's a big change from their past practice.

    I assume that as I had a free choice of which company to sell our solar electricity to in the first place, I could now switch to another one, somehow.   But that would only be useful if I could find one that made payments more promptly.  Are other energy companies just as slow?

    My payments (by cheque) have always been 3 months behind. First with SSE
    who then moved us to Ovo Energy.


    --
    Regards
    wasbit

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  • From Max Demian@21:1/5 to wasbit on Mon Jan 27 18:01:13 2025
    On 27/01/2025 10:16, wasbit wrote:
    On 26/01/2025 12:40, Clive Page wrote:
    We've had solar panels on our roof for about a decade and signed up
    with EDF energy, our energy supplier at the time, to get the FIT
    payments. Until last year it all went smoothly, I read the meter every
    quarter, send in the reading via their website, and a payment came by
    bank transfer with a week or so.  It was, in the long term, a
    reasonable return on our investment.

    About a year ago EDF changed to a new computer system which simply
    didn't work.  They told us they couldn't make bank transfers any more
    and actually sent us a cheque for one quarter.  They have now resumed
    bank transfers but instead of arriving right away, payments take
    nearly 3 months and even the notification of payment takes weeks.
    When I complained they pointed out that this is permitted under their
    terms and conditions, which it is, but it's a big change from their
    past practice.

    I assume that as I had a free choice of which company to sell our
    solar electricity to in the first place, I could now switch to another
    one, somehow.   But that would only be useful if I could find one that
    made payments more promptly.  Are other energy companies just as slow?

    My payments (by cheque) have always been 3 months behind. First with SSE
    who then moved us to Ovo Energy.

    Why doesn't the meter just go backwards?

    --
    Max Demian

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  • From Tim+@21:1/5 to Max Demian on Mon Jan 27 18:33:38 2025
    Max Demian <max_demian@bigfoot.com> wrote:
    On 27/01/2025 10:16, wasbit wrote:
    On 26/01/2025 12:40, Clive Page wrote:
    We've had solar panels on our roof for about a decade and signed up
    with EDF energy, our energy supplier at the time, to get the FIT
    payments. Until last year it all went smoothly, I read the meter every
    quarter, send in the reading via their website, and a payment came by
    bank transfer with a week or so.  It was, in the long term, a
    reasonable return on our investment.

    About a year ago EDF changed to a new computer system which simply
    didn't work.  They told us they couldn't make bank transfers any more
    and actually sent us a cheque for one quarter.  They have now resumed
    bank transfers but instead of arriving right away, payments take
    nearly 3 months and even the notification of payment takes weeks.
    When I complained they pointed out that this is permitted under their
    terms and conditions, which it is, but it's a big change from their
    past practice.

    I assume that as I had a free choice of which company to sell our
    solar electricity to in the first place, I could now switch to another
    one, somehow.   But that would only be useful if I could find one that >>> made payments more promptly.  Are other energy companies just as slow?

    My payments (by cheque) have always been 3 months behind. First with SSE
    who then moved us to Ovo Energy.

    Why doesn't the meter just go backwards?


    Some old spinny disc ones would but later models had a ratchet or freewheel
    to stop this. As to why, no electricity company wants to pay you as much
    as they charge!

    Tim

    --
    Please don't feed the trolls

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  • From Theo@21:1/5 to timdownieuk@yahoo.co.youkay on Mon Jan 27 18:41:12 2025
    Tim+ <timdownieuk@yahoo.co.youkay> wrote:
    Some old spinny disc ones would but later models had a ratchet or freewheel to stop this. As to why, no electricity company wants to pay you as much
    as they charge!

    Any ideas how old they need to be to spin backwards?

    If you end up with negative consumption during a billing period, do they pay you? At what rate?

    Theo

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  • From Tim+@21:1/5 to Theo on Mon Jan 27 19:21:13 2025
    Theo <theom+news@chiark.greenend.org.uk> wrote:
    Tim+ <timdownieuk@yahoo.co.youkay> wrote:
    Some old spinny disc ones would but later models had a ratchet or freewheel >> to stop this. As to why, no electricity company wants to pay you as much
    as they charge!

    Any ideas how old they need to be to spin backwards?

    Sorry, dunno. If it has a ratchet there is a symbol printed on the dial to indicate this. Take a picture and share it if you’re not sure.


    If you end up with negative consumption during a billing period, do they pay you? At what rate?

    I doubt there is a mechanism for the power company to pay you in these circumstances if you don’t have an official export tariff set up. As long
    as you don’t go negative you’re effectively cancelling out your consumption at the same rate you’re paying.

    A solar panel fitter is supposed to check that your meter *doesn’t* go backwards, and if it does should inform the power company so that they can upgrade the meter.

    Sometimes it gets forgotten and in these circumstances it pays to keep
    shtoom and plead ignorance. ;-)

    Tim

    --
    Please don't feed the trolls

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  • From Tim+@21:1/5 to timdownieuk@yahoo.co.youkay on Tue Jan 28 07:56:57 2025
    Tim+ <timdownieuk@yahoo.co.youkay> wrote:
    Theo <theom+news@chiark.greenend.org.uk> wrote:
    Tim+ <timdownieuk@yahoo.co.youkay> wrote:
    Some old spinny disc ones would but later models had a ratchet or freewheel >>> to stop this. As to why, no electricity company wants to pay you as much >>> as they charge!

    Any ideas how old they need to be to spin backwards?

    Sorry, dunno. If it has a ratchet there is a symbol printed on the dial to indicate this. Take a picture and share it if you’re not sure.




    Found an example. (You’ll have to scroll down a bit).

    https://powerforum.co.za/topic/2552-does-my-meter-go-backwards-test/

    Tim



    --
    Please don't feed the trolls

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  • From www.GymRatZ.co.uk@21:1/5 to Theo on Wed Jan 29 12:06:48 2025
    On 27/01/2025 18:41, Theo wrote:
    Tim+ <timdownieuk@yahoo.co.youkay> wrote:
    Some old spinny disc ones would but later models had a ratchet or freewheel >> to stop this. As to why, no electricity company wants to pay you as much
    as they charge!

    Any ideas how old they need to be to spin backwards?

    If you end up with negative consumption during a billing period, do they pay you? At what rate?

    I know of a 1984 one goes backwards.

    Hypothetically:

    If it were me; through the late Spring to early Autumn I'd probably
    submit the previous months readings with one or more units added on so
    it accounts correctly on the suppliers records.

    By end of September or October readings I would expect all "credit"
    units to have been used up and then I'd start submitting correct readings.

    All hypothetical of course.
    <VBG>

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  • From Theo@21:1/5 to timdownieuk@yahoo.co.youkay on Wed Jan 29 17:16:18 2025
    Tim+ <timdownieuk@yahoo.co.youkay> wrote:
    Tim+ <timdownieuk@yahoo.co.youkay> wrote:
    Theo <theom+news@chiark.greenend.org.uk> wrote:
    Tim+ <timdownieuk@yahoo.co.youkay> wrote:
    Some old spinny disc ones would but later models had a ratchet or freewheel
    to stop this. As to why, no electricity company wants to pay you as much >>> as they charge!

    Any ideas how old they need to be to spin backwards?

    Sorry, dunno. If it has a ratchet there is a symbol printed on the dial to indicate this. Take a picture and share it if you’re not sure.




    Found an example. (You’ll have to scroll down a bit).

    https://powerforum.co.za/topic/2552-does-my-meter-go-backwards-test/

    Thanks. The meter number says it was installed 1990 and it's a Landis & Gyr something but I don't know the details - I'll have to take a look.

    Theo

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  • From Kay@21:1/5 to All on Mon Jun 16 20:00:08 2025
    Not only are they now paying more slowly but in their wisdom they have decided to not make payments into building society bank accounts.

    --
    For full context, visit https://www.homeownershub.com/uk-diy/slowness-of-feed-in-tariff-payments-3483045-.htm

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  • From alan_m@21:1/5 to Kay on Mon Jun 16 22:54:25 2025
    On 16/06/2025 21:00, Kay wrote:
    Not only are they now paying more slowly but in their wisdom they have decided to not make payments into building society bank accounts.


    Who are "they"?

    --
    mailto : news {at} admac {dot} myzen {dot} co {dot} uk

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  • From RJH@21:1/5 to The Other John on Tue Jun 17 03:39:47 2025
    On 26 Jan 2025 at 18:18:41 GMT, The Other John wrote:

    On 26/01/2025 12:40, Clive Page wrote:
    I assume that as I had a free choice of which company to sell our solar
    electricity to in the first place, I could now switch to another one,
    somehow. But that would only be useful if I could find one that made
    payments more promptly. Are other energy companies just as slow?

    I'm with Scottish Power and enter my solar readings every 90 days. They
    then pay into my bank in the last week of the month in which I enter it.
    No problems in the 12 years we've had the panels.

    Eon - yearly in arrears, annual payment received about 3 weeks after the 1st year anniversary.
    --
    Cheers, Rob, Sheffield UK

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  • From RJH@21:1/5 to Max Demian on Tue Jun 17 03:55:18 2025
    On 27 Jan 2025 at 19:01:13 GMT, Max Demian wrote:

    I assume that as I had a free choice of which company to sell our
    solar electricity to in the first place, I could now switch to another
    one, somehow. But that would only be useful if I could find one that
    made payments more promptly. Are other energy companies just as slow?

    My payments (by cheque) have always been 3 months behind. First with SSE
    who then moved us to Ovo Energy.

    Why doesn't the meter just go backwards?

    I generate more than I consume - I'd guess most people do? So even if you have a meter that works that way, they're going to owe you . . .

    Tangentially, I realise we're getting some exceptional weather, but I hadn't expected such an increase from last year in solar generation. May was 30% up, and April beat last year's peak generation month (June) by 20%.

    --
    Cheers, Rob, Sheffield UK

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  • From alan_m@21:1/5 to RJH on Tue Jun 17 13:44:22 2025
    On 17/06/2025 04:55, RJH wrote:
    On 27 Jan 2025 at 19:01:13 GMT, Max Demian wrote:

    I assume that as I had a free choice of which company to sell our
    solar electricity to in the first place, I could now switch to another >>>> one, somehow. But that would only be useful if I could find one that >>>> made payments more promptly. Are other energy companies just as slow? >>>>
    My payments (by cheque) have always been 3 months behind. First with SSE >>> who then moved us to Ovo Energy.

    Why doesn't the meter just go backwards?

    I generate more than I consume - I'd guess most people do? So even if you have
    a meter that works that way, they're going to owe you . . .

    Not if the electricity you use when your panels are not working cost
    more than that what you get for exporting. The days of large FIT are
    possibly gone with newer installations.


    Tangentially, I realise we're getting some exceptional weather, but I hadn't expected such an increase from last year in solar generation. May was 30% up, and April beat last year's peak generation month (June) by 20%.



    Doesn't this highlight the problem with the country relying on variable
    output solar and wind. How much do you install? Enough capacity or the
    worst case, for the average case or the best case.

    --
    mailto : news {at} admac {dot} myzen {dot} co {dot} uk

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  • From Peter Johnson@21:1/5 to All on Tue Jun 17 15:04:47 2025
    On Tue, 17 Jun 2025 13:44:22 +0100, alan_m <junk@admac.myzen.co.uk>
    wrote:

    On 17/06/2025 04:55, RJH wrote:
    On 27 Jan 2025 at 19:01:13 GMT, Max Demian wrote:

    I assume that as I had a free choice of which company to sell our
    solar electricity to in the first place, I could now switch to another >>>>> one, somehow. But that would only be useful if I could find one that >>>>> made payments more promptly. Are other energy companies just as slow? >>>>>
    My payments (by cheque) have always been 3 months behind. First with SSE >>>> who then moved us to Ovo Energy.

    Why doesn't the meter just go backwards?

    I generate more than I consume - I'd guess most people do? So even if you have
    a meter that works that way, they're going to owe you . . .

    Not if the electricity you use when your panels are not working cost
    more than that what you get for exporting. The days of large FIT are
    possibly gone with newer installations.

    It was 42p/unit when the FIT scheme started but that only lasted for a
    couple of years. It's been reducing ever since. Don't know the current
    rate.


    Tangentially, I realise we're getting some exceptional weather, but I hadn't >> expected such an increase from last year in solar generation. May was 30% up,
    and April beat last year's peak generation month (June) by 20%.



    Doesn't this highlight the problem with the country relying on variable >output solar and wind. How much do you install? Enough capacity or the
    worst case, for the average case or the best case.

    There is no intention of reying on renewables. That's why Hickley C,
    and possibly Sizewell B, power stations are being built, to provide at
    base. And Rolls Royce has just been contracted to provide modular
    nuclear stations as well.

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  • From RJH@21:1/5 to Peter Johnson on Tue Jun 17 14:27:26 2025
    On 17 Jun 2025 at 15:04:47 BST, Peter Johnson wrote:

    On Tue, 17 Jun 2025 13:44:22 +0100, alan_m <junk@admac.myzen.co.uk>
    wrote:

    On 17/06/2025 04:55, RJH wrote:
    On 27 Jan 2025 at 19:01:13 GMT, Max Demian wrote:

    I assume that as I had a free choice of which company to sell our
    solar electricity to in the first place, I could now switch to another >>>>>> one, somehow. But that would only be useful if I could find one that >>>>>> made payments more promptly. Are other energy companies just as slow? >>>>>>
    My payments (by cheque) have always been 3 months behind. First with SSE >>>>> who then moved us to Ovo Energy.

    Why doesn't the meter just go backwards?

    I generate more than I consume - I'd guess most people do? So even if you have
    a meter that works that way, they're going to owe you . . .

    Not if the electricity you use when your panels are not working cost
    more than that what you get for exporting. The days of large FIT are
    possibly gone with newer installations.


    Not quite sure how to express it, then. There are times when I use electricity from the grid. But that's more than offset by the surplus generated at other times. The surplus either goes to the battery, or exported to Eon.

    I haven't paid anything for electricity over the past 12 months. Better?

    It was 42p/unit when the FIT scheme started but that only lasted for a
    couple of years. It's been reducing ever since. Don't know the current
    rate.


    Eon pay 16.5p. I pay 22p. Plus about 55p/day standing charge.


    Tangentially, I realise we're getting some exceptional weather, but I hadn't
    expected such an increase from last year in solar generation. May was 30% up,
    and April beat last year's peak generation month (June) by 20%.



    Doesn't this highlight the problem with the country relying on variable
    output solar and wind.

    The country doesn't rely on wind and solar alone. Many other sources exist.

    How much do you install? Enough capacity or the
    worst case, for the average case or the best case.


    Generally, as much as you can - that'll get you the best return. Helps a lot
    if you have a battery.

    There is no intention of reying on renewables. That's why Hickley C,
    and possibly Sizewell B, power stations are being built, to provide at
    base. And Rolls Royce has just been contracted to provide modular
    nuclear stations as well.

    Yep.

    --
    Cheers, Rob, Sheffield UK

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  • From The Other John@21:1/5 to RJH on Tue Jun 17 15:33:32 2025
    On 17/06/2025 04:39, RJH wrote:
    Eon - yearly in arrears, annual payment received about 3 weeks after the 1st year anniversary.

    Scottish Power were very good this month. I entered the reading on the
    6th and they paid me on the 12th.

    --
    TOJ

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  • From SteveW@21:1/5 to All on Tue Jun 17 17:44:12 2025
    On 17/06/2025 13:44, alan_m wrote:
    On 17/06/2025 04:55, RJH wrote:
    On 27 Jan 2025 at 19:01:13 GMT, Max Demian wrote:

    I assume that as I had a free choice of which company to sell our
    solar electricity to in the first place, I could now switch to another >>>>> one, somehow.   But that would only be useful if I could find one that >>>>> made payments more promptly.  Are other energy companies just as slow? >>>>>
    My payments (by cheque) have always been 3 months behind. First with
    SSE
    who then moved us to Ovo Energy.

    Why doesn't the meter just go backwards?

    I generate more than I consume - I'd guess most people do? So even if
    you have
    a meter that works that way, they're going to owe you . . .

    Not if the electricity you use when your panels are not working cost
    more than that what you get for exporting. The days of large FIT are
    possibly gone with newer installations.


    Tangentially, I realise we're getting some exceptional weather, but I
    hadn't
    expected such an increase from last year in solar generation. May was
    30% up,
    and April beat last year's peak generation month (June) by 20%.



    Doesn't this highlight the problem with the country relying on variable output solar and wind.  How much do you install? Enough capacity or the worst case, for the average case or the best case.

    The problem with intermittency is simply storage. I read this morning
    (I've not checked into the figures), that all the storage in the world
    is only sufficient for 10 minutes of world demand.

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  • From The Natural Philosopher@21:1/5 to SteveW on Tue Jun 17 19:24:57 2025
    On 17/06/2025 17:44, SteveW wrote:
    The problem with intermittency is simply storage. I read this morning
    (I've not checked into the figures), that all the storage in the world
    is only sufficient for 10 minutes of world demand.

    Not just storage.

    Unless the storage is co located with the intermittent source, you have
    an overspecified cable that mostly gets underused connecting the source
    to the store = more waste and environmental impact

    --
    Climate is what you expect but weather is what you get.
    Mark Twain

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  • From RJH@21:1/5 to The Natural Philosopher on Tue Jun 17 18:35:17 2025
    On 17 Jun 2025 at 19:24:57 BST, The Natural Philosopher wrote:

    On 17/06/2025 17:44, SteveW wrote:
    The problem with intermittency is simply storage. I read this morning
    (I've not checked into the figures), that all the storage in the world
    is only sufficient for 10 minutes of world demand.

    Not just storage.

    Unless the storage is co located with the intermittent source,

    Trying to drag this back OT - that is exactly what a typical residential solar/battery installation is.

    you have
    an overspecified cable that mostly gets underused connecting the source
    to the store = more waste and environmental impact

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  • From alan_m@21:1/5 to RJH on Tue Jun 17 20:20:52 2025
    On 17/06/2025 19:35, RJH wrote:
    On 17 Jun 2025 at 19:24:57 BST, The Natural Philosopher wrote:

    On 17/06/2025 17:44, SteveW wrote:
    The problem with intermittency is simply storage. I read this morning
    (I've not checked into the figures), that all the storage in the world
    is only sufficient for 10 minutes of world demand.

    Not just storage.

    Unless the storage is co located with the intermittent source,

    Trying to drag this back OT - that is exactly what a typical residential solar/battery installation is.


    For an individual domestic dwelling if the householder can afford solar
    and a battery (now and after subsidies end) this is probably the best
    way of using everything the solar on the roof can generate.

    The battery cannot however store all the excess generated in the summer
    for use in the winter. In X years time after the installation costs are
    paid for the income from the export may exceed the cost of the import
    from the grid but it doesn't negate the need for national backup to meet
    the shortfall when all the solar is producing virtually nothing mid winter.

    As for more is better. Is this true for domestic solar? If domestic
    solar becomes more popular can the wires in the street cope with all the
    excess generation being fed back into the grid on a nice long bright
    day? Possibly more importantly can it cope with an imbalance between
    phases when some properties at random will be charging local batteries
    while others in the same street will be exporting to the grid.

    --
    mailto : news {at} admac {dot} myzen {dot} co {dot} uk

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  • From Davey@21:1/5 to Peter Johnson on Tue Jun 17 23:44:51 2025
    On Tue, 17 Jun 2025 15:04:47 +0100
    Peter Johnson <peter@parksidewood.nospam> wrote:

    On Tue, 17 Jun 2025 13:44:22 +0100, alan_m <junk@admac.myzen.co.uk>
    wrote:

    On 17/06/2025 04:55, RJH wrote:
    On 27 Jan 2025 at 19:01:13 GMT, Max Demian wrote:

    I assume that as I had a free choice of which company to sell
    our solar electricity to in the first place, I could now switch
    to another one, somehow. But that would only be useful if I
    could find one that made payments more promptly. Are other
    energy companies just as slow?
    My payments (by cheque) have always been 3 months behind. First
    with SSE who then moved us to Ovo Energy.

    Why doesn't the meter just go backwards?

    I generate more than I consume - I'd guess most people do? So even
    if you have a meter that works that way, they're going to owe you
    . . .

    Not if the electricity you use when your panels are not working cost
    more than that what you get for exporting. The days of large FIT are >possibly gone with newer installations.

    It was 42p/unit when the FIT scheme started but that only lasted for a
    couple of years. It's been reducing ever since. Don't know the current
    rate.


    Tangentially, I realise we're getting some exceptional weather,
    but I hadn't expected such an increase from last year in solar
    generation. May was 30% up, and April beat last year's peak
    generation month (June) by 20%.


    Doesn't this highlight the problem with the country relying on
    variable output solar and wind. How much do you install? Enough
    capacity or the worst case, for the average case or the best case.

    There is no intention of reying on renewables. That's why Hickley C,
    and possibly Sizewell B, power stations are being built, to provide at
    base. And Rolls Royce has just been contracted to provide modular
    nuclear stations as well.

    I think you mean Sizewell C. B has been operating for years. Also
    'Hickley' is missing an 'n'.
    Typos rule!

    --
    Davey.

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  • From The Natural Philosopher@21:1/5 to RJH on Wed Jun 18 10:53:05 2025
    On 17/06/2025 19:35, RJH wrote:
    On 17 Jun 2025 at 19:24:57 BST, The Natural Philosopher wrote:

    Unless the storage is co located with the intermittent source,

    Trying to drag this back OT - that is exactly what a typical residential solar/battery installation is.

    Yes, but its not justifiable cost wise on any scale, including domestic.

    It's only the subsidies that make it seem so..



    --
    “It is dangerous to be right in matters on which the established
    authorities are wrong.”

    ― Voltaire, The Age of Louis XIV

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  • From The Natural Philosopher@21:1/5 to All on Wed Jun 18 10:57:11 2025
    On 17/06/2025 20:20, alan_m wrote:
    As for more is better. Is this true for domestic solar? If domestic
    solar becomes more popular can the wires in the street cope with all the excess generation being fed back into the grid on a nice long bright
    day? Possibly more importantly can it cope with an imbalance between
    phases when some properties at random will be charging local batteries
    while others in the same street will be exporting to the grid.

    I think given the amount of electricity forecast to be used the grid
    will have to be upscaled anyway.

    As far as phase imbalance goes, its no different from one bloke charging
    his EV or growing his cannabis all night on one phase.

    The key is 'at random'

    Statistically it averages out.

    I have no technical objections to domestic solar with batteries. My
    objection is to paying for it.

    --
    “It is dangerous to be right in matters on which the established
    authorities are wrong.”

    ― Voltaire, The Age of Louis XIV

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  • From RJH@21:1/5 to All on Wed Jun 18 11:46:35 2025
    On 17 Jun 2025 at 20:20:52 BST, alan_m wrote:

    On 17/06/2025 19:35, RJH wrote:
    On 17 Jun 2025 at 19:24:57 BST, The Natural Philosopher wrote:

    On 17/06/2025 17:44, SteveW wrote:
    The problem with intermittency is simply storage. I read this morning
    (I've not checked into the figures), that all the storage in the world >>>> is only sufficient for 10 minutes of world demand.

    Not just storage.

    Unless the storage is co located with the intermittent source,

    Trying to drag this back OT - that is exactly what a typical residential
    solar/battery installation is.


    For an individual domestic dwelling if the householder can afford solar
    and a battery (now and after subsidies end) this is probably the best
    way of using everything the solar on the roof can generate.

    The battery cannot however store all the excess generated in the summer
    for use in the winter. In X years time after the installation costs are
    paid for the income from the export may exceed the cost of the import
    from the grid but it doesn't negate the need for national backup to meet
    the shortfall when all the solar is producing virtually nothing mid winter.


    Yes, of course. I did mention upthread that I have to import from the grid
    over 3 or 4 winter months.

    As for more is better. Is this true for domestic solar? If domestic
    solar becomes more popular can the wires in the street cope with all the excess generation being fed back into the grid on a nice long bright
    day? Possibly more importantly can it cope with an imbalance between
    phases when some properties at random will be charging local batteries
    while others in the same street will be exporting to the grid.

    At the moment, given the low cost of panels and the low marginal cost of fitting extra, more is better.

    But yes, in the future, somebody somewhere is going to have to get their head around it all.

    I think EVs have the potential to soak up a fair amount, especially if electricity can be expanded to mass transit and goods transport.

    But at worst any excess capacity will just have to be lost.

    --
    Cheers, Rob, Sheffield UK

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