Government power blackouts and solar PV

www.theguardian.com/environment/2022/aug/23/energy-use-is-a-decision-for-individuals-insist-no-10-and-truss-allies

If the government have intentional blackouts, will our solar pv work? Grid-tied solar is designed not to function during power cuts. Are 'planned' blackouts the same as power cuts?
London. 6.4kwh system, South facing. 16 Hyundai 400kw all black panels w/ optimisers, 6kw Solaredge HD Wave inverter, Solar Iboost with two immersion heaters on one 240l hw tank. Octopus Flux. Ivar 5 Wood Burning Stove. Leaf 62kwh plus Zappi. Two chickens: 1 Light Sussex, 1 Speckled Rock. Omlet walk-in run. Approx 1.5 eggs per day egg generation rate using Marriage's organic layers pellets.
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Comments

  • EricMears
    EricMears Posts: 3,231 Forumite
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    Unless you've got an 'island' function on your inverter,  a grid tied inverter will stop working when you've been disconnected from the grid and won't 'know' why the disconnection happened.
    NE Derbyshire.4kWp S Facing 17.5deg slope (dormer roof).24kWh of Pylontech batteries with Lux controller BEV : Hyundai Ioniq5
  • NoobSolar
    NoobSolar Posts: 117 Forumite
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    Yes. But is a planned power outage the same as that? Is it being disconnected?
    London. 6.4kwh system, South facing. 16 Hyundai 400kw all black panels w/ optimisers, 6kw Solaredge HD Wave inverter, Solar Iboost with two immersion heaters on one 240l hw tank. Octopus Flux. Ivar 5 Wood Burning Stove. Leaf 62kwh plus Zappi. Two chickens: 1 Light Sussex, 1 Speckled Rock. Omlet walk-in run. Approx 1.5 eggs per day egg generation rate using Marriage's organic layers pellets.
  • QrizB
    QrizB Posts: 13,822 Forumite
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    NoobSolar said:
    Yes. But is a planned power outage the same as that? Is it being disconnected?

    Yes.
    If the power goes off, it makes no difference to your inverter whether it's intentional or an accident.
    You can simulate a blackout by switching the mains off at your consumer unit (make sure that no-one is eg. in an electric shower when you do this).
    N. Hampshire, he/him. Octopus Go elec & Tracker gas / Shell BB / Lyca mobi. Ripple Kirk Hill member.
    2.72kWp PV facing SSW installed Jan 2012. 11 x 247w panels, 3.6kw inverter. 30MWh generated, long-term average 2.6 Os.
    Taking a break, hope to be back eventually.
    Ofgem cap table, Ofgem cap explainer. Economy 7 cap explainer. Gas vs E7 vs peak elec heating costs.
  • Screwdriva
    Screwdriva Posts: 1,160 Forumite
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    A Powerwall or capable battery system will mitigate this scenario. The Powerwall actually predicts blackouts and fills itself up to 100%. 

    As anti-battery as I am, the moment we experience more than one blackout, I'm signing myself up for an LG Chem battery! 

    -  10 x 400w LG + 6 x 550W SHARP BiFacial Panels + SE 3680 HD Wave Inverter + SE Optimizers. SE London.
    -  Triple aspect. (22% ENE/ 33% SSE/ 45% WSW)
    -  Viessmann 200-W on Advanced Weather Comp. (the most efficient gas boiler sold)

    Feel free to DM me if I can help with any energy saving!
  • I have been playing around with the idea of buying a generator 'just in case' - as I work from home and have to be able to support customers. It might be moot, as I also rely on working broadband.

    I believe you can have your wiring changed in such a way that you can disconnect from grid and connect to a generator - which should in principle allow for solar to continue generating.
    Central Beds, 2.02kWp (9 x 225W) south facing with some morning shade, installed 2011 (£7.16/Wp). Tigo monitoring/optimisers on all panels, Growatt MIC 2000 TL-X Inverter and Solar iBoost installed 2022. (4 x 415W + 6 x 405W garden experiment connected to SunSynk 3.6 hybrid inverter & 2 x 5.3kWh SynSynk batteries) (4 x 405W panels queued to go somewhere)
  • Magnitio
    Magnitio Posts: 907 Forumite
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    I have been playing around with the idea of buying a generator 'just in case' - as I work from home and have to be able to support customers. It might be moot, as I also rely on working broadband.

    I believe you can have your wiring changed in such a way that you can disconnect from grid and connect to a generator - which should in principle allow for solar to continue generating.

    Do you have a laptop with a reasonable battery and the option of using your phone as a wifi hotspot? That would potentially keep you going for a few hours.
    6.4kWp (16 * 400Wp REC Alpha) facing ESE + 5kW Huawei inverter + 10kWh Huawei battery. Buckinghamshire.
  • A Powerwall or capable battery system will mitigate this scenario. 
    A battery on its own will do absolutely nothing to mitigate this scenario (if you want to stay on the right side of the law/regs.).  You also need a means of isolating whatever is being powered by the battery from the mains; the same would apply to a generator supplying the backup power.  
    Reed
  • gefnew
    gefnew Posts: 876 Forumite
    Name Dropper First Post First Anniversary
    You could invest in a ups system to mitigate power outages, top it up with solar when you do not need it.
    UPS Systems - UPS Battery Backup | Critical Power Supplies
  • QrizB
    QrizB Posts: 13,822 Forumite
    First Anniversary First Post Photogenic Name Dropper
    edited 23 August 2022 at 11:44AM
    I have been playing around with the idea of buying a generator 'just in case' - as I work from home and have to be able to support customers.
    I've got a generator; I've needed it twice (maybe thrice) in 16 years. I run it for an hour once a year just to reassure myself that it's going to work when I need it.
    I believe you can have your wiring changed in such a way that you can disconnect from grid and connect to a generator - which should in principle allow for solar to continue generating.
    You can; google "transfer switch".
    Personally I've not yet felt the need, I run a (long) extension cable from the generator through an open window and into my house, then plug into that.
    Don't be tempted to use a suicide cable, they're called that for a reason. (That's a US site and talks about 120V circuits but the principle's the same.)
    N. Hampshire, he/him. Octopus Go elec & Tracker gas / Shell BB / Lyca mobi. Ripple Kirk Hill member.
    2.72kWp PV facing SSW installed Jan 2012. 11 x 247w panels, 3.6kw inverter. 30MWh generated, long-term average 2.6 Os.
    Taking a break, hope to be back eventually.
    Ofgem cap table, Ofgem cap explainer. Economy 7 cap explainer. Gas vs E7 vs peak elec heating costs.
  • Magnitio said:
    I have been playing around with the idea of buying a generator 'just in case' - as I work from home and have to be able to support customers. It might be moot, as I also rely on working broadband.

    I believe you can have your wiring changed in such a way that you can disconnect from grid and connect to a generator - which should in principle allow for solar to continue generating.

    Do you have a laptop with a reasonable battery and the option of using your phone as a wifi hotspot? That would potentially keep you going for a few hours.
    While I have a laptop, my main setup is a little more power hungry. I have UPSs on the broadband, network, servers and PC but these don't last a great deal of time. 

    A generator as a backup makes sense financially as it's a few hundred pounds rather than the few thousand that a battery setup would cost in the current environment of battery shortages and in-demand installers. 
    Central Beds, 2.02kWp (9 x 225W) south facing with some morning shade, installed 2011 (£7.16/Wp). Tigo monitoring/optimisers on all panels, Growatt MIC 2000 TL-X Inverter and Solar iBoost installed 2022. (4 x 415W + 6 x 405W garden experiment connected to SunSynk 3.6 hybrid inverter & 2 x 5.3kWh SynSynk batteries) (4 x 405W panels queued to go somewhere)
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