Posted by: @batalto

↑

the only really interesting on Octopus is Intelligent, and its not open to me as I need the right kind of EV charger.

I don't think any of us yet has the right kind of EV charger.
I've deliberately not yet installed one on my EV Charge Point at all whilst I'm watching market developments.

All of the present 'Smart' chargers are being operated only in respect of them being ON or OFF.

To use the increasing quantities of renewable electricity available on the grid, our charge times need to be spread over as many ToU half-hour periods as possible.

Eg: Instead of switching on a charger at 00:30 at 7kW for 90-mins (10.5kWh total), it should be capable of spreading that demand over 4 or 5 hours.
That reduces grid losses and minimises the costs of upgrading grid infrastructure.

@benseb

That's so exciting I'm very envious😁

We thinking of 11kWh battery.

So in theory, correct me if I am wrong yesterday used 35kwh, 6kWh for house stuff 29kWh ashp so if we had a 11kWh battery could I buy 11kwh from grid 4am-7am use 6kWh then top back up to 11kWh 1pm-4pm ?  would mean I would buy 17kWh in total @ 0.198p then hopefully use normal grid energy in the cheaper times. So 23 hrs  in total @  0.198p , by pass the 0.528p time use battery (thats only about 1kWh cos we obvs load shift) So the remaining time 12kWh would be @ 0.33p at standard tariff.

Is that how it would work?

I am hoping that's how it would work.

@sand I am selling 10.4kwh of Pylontech batteries at the moment. So if you are interested drop me a line. I'm using the money to fund a DIY battery and upgrade on my inverter/chargers.

@batalto

Thanks for that. To be honest I have only just learnt about battery home storage, mainly that you can buy from the grid. I haven't done any yearly figures re solar battery or just solar yet and need to get my head around how the whole process works and the pay back times.

Posted by: @transparent

↑

Posted by: @batalto

↑

the only really interesting on Octopus is Intelligent, and its not open to me as I need the right kind of EV charger.

I don't think any of us yet has the right kind of EV charger.
I've deliberately not yet installed one on my EV Charge Point at all whilst I'm watching market developments.

-- Attachment is not available --

All of the present 'Smart' chargers are being operated only in respect of them being ON or OFF.

To use the increasing quantities of renewable electricity available on the grid, our charge times need to be spread over as many ToU half-hour periods as possible.

Eg: Instead of switching on a charger at 00:30 at 7kW for 90-mins (10.5kWh total), it should be capable of spreading that demand over 4 or 5 hours.
That reduces grid losses and minimises the costs of upgrading grid infrastructure.

I thought it was interesting the new EV charger regulations have a randomised up to  10min delay on any schedule you set (can be overridden), and that this can be increased to up to 30min by energy suppliers. 

Be interesting to see how all the tech works together seemlessly. 

@sand if you don't have solar its actually pretty simple to do. I assume you know your usage per day? and that you can get a cheap rate e.g. Go. I'll use myself as an example.

Demand daily (general use e.g. washing machine, lights etc) around 15kw (not including my ASHP)

Cost off peak: 7.5p/kwh  - Daily: 7.5p/kwh x 15kw = £1.125

Cost peak: 34p/kwh (price cap)  - Daily = 34p/kwh x 15kw =  £5.1

Potential saving every day = £3.97

yearly saving = £3.97 * 365 days = £1,450

You can then work out your payback etc from those figures. If you add solar, then obviously that power is free and the benefit is greater.

@batalto 

I can't get the Go tariff I don't have an EV 🙂 thats why I'm on Cosy currently so that's why I quoted Cosy tarrif figs above. 

So need to crunch numbers, seems like that's all I do since I got ashp🙄

@sand who says you need an EV..... 😉

Posted by: @jeff

↑

new EV charger regulations have a randomised up to  10min delay on any schedule you set (can be overridden), and that this can be increased to up to 30min by energy suppliers

Where are those 'regulations' published @jeff ?
These must surely have been agreed in discussions with Ofgem.

To allow the Energy Supplier to alter your settings means that they must be sending commands across the internet, as opposed to using the features within our Smart Meters.

The original Smart Meter spec from 2013 stipulates that all electricity (and gas) meters must have randomised numbers placed within them at the time of manufacture.
Those numbers are used within the firmware algorithms to define when your charging periods start.
Moreover, the mechanism by which this achieved must itself be encrypted and protected to prevent it being analysed.

For an electricity meter the algorithm creates a delay (post-UTC) of up to 1799 seconds.

The 'tech' may work together seamlessly, but I can't see how the bills can be correct.

The Energy Suppliers are unable to interrogate a Smart Meter to ascertain the randomised delay, precisely because the spec states that such data is protected.

I do understand why this is so.
It relates to the security of the UK Energy Supply.
I'm obviously not going to describe the nature of the threat here on an open forum!

I believe it is very unwise for Ofgem to have agreed to a workaround under these circumstances.
Whyever hasn't NCSC stepped in to overrule them?

Posted by: @sand

↑

@batalto 

I can't get the Go tariff I don't have an EV 🙂 thats why I'm on Cosy currently so that's why I quoted Cosy tarrif figs above. 

So need to crunch numbers, seems like that's all I do since I got ashp🙄

Even if Octopus state that Go is designed for EV owners, I think that they may have difficulty excluding none EV owners, since it may be deemed discriminatory.

Quite @derek-m !

In fact, those of us with storage batteries and an appreciation of how electricity demands are made, could readily configure them to 'look like' an EV charger or a heat-pump as far as our Energy Supplier is concerned. 🤔 

Posted by: @derek-m

↑

Posted by: @sand

↑

@batalto 

I can't get the Go tariff I don't have an EV 🙂 thats why I'm on Cosy currently so that's why I quoted Cosy tarrif figs above. 

So need to crunch numbers, seems like that's all I do since I got ashp🙄

Even if Octopus state that Go is designed for EV owners, I think that they may have difficulty excluding none EV owners, since it may be deemed discriminatory.

 

A few of their staff have told me that I could be put onto that tariff even though I don't have an EV, I know of several others in different forums that are on Go without EVs, Octopus are pretty loose with the checks.