Best Tarrif for Battery Storage

in Energy
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Ollie2016ukOllie2016uk Forumite
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Hi all,

I am currently with Bulb soon to be Octopus I believe. I'm having storage batteries installed soon to sit alongside my solar. I don't generate enough surplus energy through these to fill the batteries during the day (especially at the moment). Does anyone recommend a tariff so I could charge these off-peak to use during the day? I was thinking of an EV tariff but I don't have an EV car is that going to matter? 

Anyone with a similar setup any advice would be appreciated. 


  • Alnat1Alnat1 Forumite
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    We don't have an EV so chose Agile as the next best option for us. You could also look at E7 if you'd prefer fixed hours each night to charge batteries.

    Octopus allow you to switch tariffs every 30 days (we've swapped between fixed and agile outgoing a few times) so it's not a big problem if you change your mind or prices move
    Barnsley, South Yorkshire
    Solar PV 5.25kWp SW facing (14 x 375 Longi) Lux 3.6kw hybrid inverter and 4.8kw Pylontech battery storage installed March 22
    Octopus Flux electric and Tracker gas
  • dunstonhdunstonh Forumite
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    I would have thought Agile would be best if your battery capacity is good enough and you keep monitoring.

    Bulb on E7 has a low ratio difference between peak and off peak. So, its not usually as good for solar/battery.  EDF is 7p (inc vat) for us off peak (economy 7). I am in the switching process now from bulb to them.    Our solar is being installed in April.   The modelling indicates we probably will not use peak electricity again after that.  Just solar and off peak.    I will stick with EDF initially at 7p whilst I learn the system and understand it more.    Once I have confidence, I would probably look at Agile.

    I am an Independent Financial Adviser (IFA). The comments I make are just my opinion and are for discussion purposes only. They are not financial advice and you should not treat them as such. If you feel an area discussed may be relevant to you, then please seek advice from an Independent Financial Adviser local to you.
  • Ollie2016ukOllie2016uk Forumite
    3 Posts
    Fifth Anniversary First Post Combo Breaker
    Thanks both, 

    I've seen the agile tariff, It would be interesting to hear some figures for Agile or your experience with it? 
  • edited 15 January at 4:59PM
    Officer_DibbleOfficer_Dibble Forumite
    308 Posts
    Part of the Furniture 100 Posts Photogenic Name Dropper
    edited 15 January at 4:59PM is one of the sites that's got Agile data.

    @dunstonh is quite correct that low differential between off peak and peak prices isn't great for battery users, but in Octopus' case that can be balanced against their high 15p/kWh export rate. We went with E7 rather than Agile as it's rather more hands off - if you're happy to keep watching prices and charging/exporting accordingly than Agile will probably pay off. Then there's the Tracker tariff to consider too.
    4.7kWp (12 * Hyundai S395VG) facing more or less S + 3.6kW Growatt inverter + 6.5kWh Growatt battery. SE London/Kent. Fitted 03/22 £1,025/kW + battery £2495

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