@toodles That's was my question before I joined, they said no. I don't have a EV charger either.

This would be great for you. If I remember u have a battery so just charge it up full and use it all day when needed ?

Ps: If anyone interested joining Eon next I can send a referral code we each get £50.

Posted by: @toodles

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I did not see any requirement to actually have an EV! Could anyone in the know confirm or deny that an EV needs to be available to charge to take advantage of this tariff please?

No, you don't an EV for the EV tariff, just like you probably don't need a heat pump for the heat pump tariff. Just names for their "products". 

*THINKS* Could I manage for 17 hours off-grid each day? Emm, (average domestic consumption = 36 kWh per day) and therefore 17 x ~1.5 kWh = 25.5 would need to be supplied by the battery, maybe the 27 kWh capacity would just about get me through to the next EV charging period. 

During the 7 EV charging hours, the DHW could be fully charged which accounts for ~3.5 - 4.5 kWh of the daily total consumption. Likewise, the heat pump consumption would be from the grid at the EV rate and the battery would be fully charged at the end of the EV charging period. It might also be possible to elevate the IAT a little during this time to save some consumption after EV tariff finishes.

So the average demand from the battery for those 17 hours ought not to exceed the available 27 kWh. There would be times when the heat pump would exceed this average consumption by perhaps an additional 10-15 kWh on a cold day and might thus require some grid power in the late evening I suppose….

Am I thinking this through correctly? Any comments would be welcomed please. Regards, Scroogily, Toodles.

Posted by: @toodles

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Am I thinking this through correctly? Any comments would be welcomed please. Regards, Scroogily, Toodles.

Your logic is sound. I've got similar battery capacity (2 x Powerwalls) which have only hit empty once so far this autumn/winter with my 7kW Vaillant heat pump adding to the domestic load and the daily mean temperature was -0.6C. That's on the Octopus Go tariff with only 5 hours of cheap power but my overall average load is less than yours.

@toodles I think eveyhting sound like a great plan for your house!

only one thing comes.to mind. From what u said about charging your hot water, u ment u heat it up fully? I do the same. Heatpump gets it up to 44 c then I use the immersion heater to get it up to 64c. As the price of electricity 3.6 times cheaper then during the day my heatpump would need to be running better than 3.6 COP to beat that during the day. In this cold weather on hot water mode at those high temperatures not possible. 

Ps: I am inserting the price from Eon Next it didn't work before.

Whilst I admire the diligence in seeking out cheap-rates from responders here, I'm getting concerned at the demand surges when thousands of homes switch stuff simultaneously.

I have correspondence from DESNZ stating that Suppliers are moving away from using Tariffs which utilise the Randomised Offset within Smart Meters, and are instead using a set of registers that coincide with UTC (GMT). I'm still verifying that assertion.

But if DESNZ are correct, then Suppliers are achieving more accurate bills, but at the cost of surge demand.
Just where are the generation sites which can be switched on in less than a minute?

What's happening to the grid frequency when multiple tariffs choose the same start-time for a cheap-rate period?!

@andris We have a Sunamp Thermino ePC210 heat battery for our DHW; it can be supplied from the grid or solar via the MyEnergi Eddi. Still thinking about the Eon Next Drive tariff; I am reluctant to leave OE as I feel they are very fair, efficient and communicate better than any previous experience with the likes of Eon - and I like Gregg’s ethos and attitude! However, OE could not offer me any such tariff without an EV and that I will never have! Regards, Toodles.

Posted by: @transparent

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Whilst I admire the diligence in seeking out cheap-rates from responders here, I'm getting concerned at the demand surges when thousands of homes switch stuff simultaneously.

That’s a fair point and a valid concern. However, isn’t this exactly the kind of issue that the grid operators and energy suppliers – the official custodians of electrons – should be factoring into their planning and contingencies? Managing demand surges is crucial as we move toward more flexible tariffs and renewable energy reliance.

@toodles so do you need to provide proof of purchase of an EV to Octopus before availing of this tariff? 

Also, what happens if someone qualifies with an EV but later sells it – would they still be allowed to stay on the tariff, or is there a risk of being moved to a different plan?

@editor Might it be practical to ‘zone’ areas so that different timing of surges might be possible? Possibly too much involved but if post coded areas (perhaps groups of post codes) were allocated to one of several different ‘time zones’, the consumers would still be given the total number of hours at the same low rates but Kraken [or whatever!] would have to allocate the slots and consumers would know when these are. Perhaps 3 zones might be sufficient to defray the surges across a region/county/ or DNO area? In other words, zone A, B or C would operate over a DNO area and post codes (or whatever) would be the means of allocating which zone a consumer fell into. The system would be agnostic to Energy Supplier - the post code would set the zone.

I imagine that defraying the surge over perhaps 3 zones ought to take the edge off the spikes? Regards, Toodles.

@editor Good questions there Mars; I have asked OE in the past and they have stated that I would need an EV to qualify for the EV based tariffs.😒 Regrets Toodles.

Posted by: @editor

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@toodles so do you need to provide proof of purchase of an EV to Octopus before availing of this tariff? 

Also, what happens if someone qualifies with an EV but later sells it – would they still be allowed to stay on the tariff, or is there a risk of being moved to a different plan?

Anyone can sign up to the Octopus Go tariff (I've been on it for several years and have yet to get an EV). The Intelligent Go tariff https://octopus.energy/smart/intelligent-octopus-go/, however, gives more hours and a lower rate but needs a compatible EV. The rest of the house then benefits from the same tariff.