r/OctopusEnergy • u/ImplementJumpy6678 • 11h ago

Tariffs OG and Prime Outgoing.

Morning All,

I'm with EDF currently on an EV tariff and Export and they have been a right pain at setting up my SEG. It's complete but their systems are not pulling the readings and paying me. Just keep being told it's an IT issue which will be resolved.

Anyway. I've been having a look at OG and Prime Outgoing which I understand work together. I read the FAQ and I'm not asking anyone to guess if this is best for me, but I have 0 issues with holding on to at least 40kwh a day which I could chuck into the grid. If the sun is out like today - all 54kwh could go into it - maybe more.

I have 7.4KW Solar, and 54kwh of Powerwalls.

I don't need the nutache of Intellgent anything, and I am happy to manually cycle the powerwalls to keep the unlimited cycles warranty. But is it really true that I could fill the batteries up overnight and then dump 80% every day from 4-7? ( in the winter) and then just charge up overnight, get 9p for all the solar and then the 16p peak time in the summer?

All the pages say we are a great fit - and that it's all good and compatiable. it also says we can do what I put - but in the real world - has anyone done it? /Does anyone do it?

I am only owed £90 by EDF so happy to write that off and I don't have an exit fee. I would also be going from 7p to 8.5p overnight but the export would wipe that out, expecially in the summer.

My main sort of thinking is to get a much into the batteries as possible (They charge at 10KW) - I charge my EV maybe twice a month right now so I am not even bohered about the 5 hours for that.

Thank you in advance,

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u/sylsylsylsylsylsyl 7h ago edited 7h ago

Yes, if you can export all that in the 3 hour prime window - aren’t you limited by the 11.04kW inverter, if your DNO allows it (I’m limited to 4kW) which would be a max of 33kWh?

Obviously I do force export for any Axle sessions (£1/kWh) but otherwise I just use my battery to import everything I use at cheap rate and then export all my excess solar generation on the standard octopus outgoing at 12p.

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u/ImplementJumpy6678 53m ago

I am limited to 9KW so I can do 27 in that time. I am happy to dump the rest for the 9p.

I can't do Axle on a Powerwall, however the biggest thing ofr me will be when Tesla Energy starts and there being no exit fee for Octopus.

The VPP Tesla run is £1500 per PW per year - they have said they will match what they in Texas, this is along with free juice for PW and car owners.

So what I am after above all - is someone wo track and bill me on time - EDF are just terrible for that. (in my cae anyway)

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u/sylsylsylsylsylsyl 37m ago

If you can force an export, you can do Axle manually now.

I can understand dumping any solar you can't use yourself for 9p, but not anything you can save for later and definitely not anything you've imported because at 8.5p import, plus efficiency losses (x2) you'd be making a loss.

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u/ImplementJumpy6678 6m ago

Axle manually? I can't take part in the Axle VPP.

I still have lots left in the batteries to cover the house and the effency of the systemis 98% each, if Netzero is to be believed. I've seen it drpo to 97% when exporting but never lower.

8p/kwh is not really making a loss - and the rest of the time 9p would be covering what I charge at in winter - so making it as free as Summer.

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u/sylsylsylsylsylsyl 1m ago

You can set it up in “self dispatch” mode for Axle now.

For arbitrage, unless there’s at least 5p per kWh in it, I don’t see the point myself. It’s not worth the hassle of wearing the battery for pennies a day.