V2H and V2G

EVandPV

JKenH wrote: »

I registered on the Wallbox website to try and get hold of one of their Quasar bidirectional chargers.

The figure I had previously seen of £1200 is only a deposit! When going to place an order the next message is

Reserve your Quasar today for £1,200 and pay the remaining £4,200 upon delivery in the first quarter of 2020.
Total price: £5,400 (VAT included)


This makes the free Quasar charger available with the OVO trial very attractive. Grab one while you can!

£5.4k, for a wall charger ?? Are they having a laugh !!??
I don't care how "smart" it is.

Arthurarthur52

We have a 2018 leaf and with ovo. We got a free Pod-Point charger with the car which means we can also charge at Sainsbury’s free. We are with ovo energy which gets us cheaper charging with polar plus. On the V2G we charge the car / house at 16.7p kWh and anything we return to the grid we get 30P kWh. This means on average we get a fully charged car every day and get around £40 a month credit. And the added bonus is I get 45p a bill business travel with my employer.

JKenH

Arthurarthur52 wrote: »

We have a 2018 leaf and with ovo. We got a free Pod-Point charger with the car which means we can also charge at Sainsbury’s free. We are with ovo energy which gets us cheaper charging with polar plus. On the V2G we charge the car / house at 16.7p kWh and anything we return to the grid we get 30P kWh. This means on average we get a fully charged car every day and get around £40 a month credit. And the added bonus is I get 45p a bill business travel with my employer.

OVO said no to me when I enquired about the trial as my maximum system output is over 4kW.
:mad:

Coastalwatch

At the third time of asking I've finally been given provisional approval to apply for the OVO scheme, so by no means there yet.

Before diving in I just wondered what the experience of others already on the scheme has been?
As they say, there's no such thing as a free lunch, so interested to learn of any drawbacks not obvious from reading the plethora of T & C's!

Naturally pleased to learn of the positives too, apart from assisting in bringing the roll out of V2G forward.:)

michaels

Coastalwatch wrote: »

At the third time of asking I've finally been given provisional approval to apply for the OVO scheme, so by no means there yet.

Before diving in I just wondered what the experience of others already on the scheme has been?
As they say, there's no such thing as a free lunch, so interested to learn of any drawbacks not obvious from reading the plethora of T & C's!

Naturally pleased to learn of the positives too, apart from assisting in bringing the roll out of V2G forward.:)

There is a Facebook group.

Martyn1981

So this happened ....... !!!

DNO have turned down the V2G for my house, unless I pay for a £39k 280m cable direct from the substation (about 100m away - maybe they have particularly wiggly trenching?) as the current cable could melt during export (of 6kW).

Slight problem with this, my understanding is that V2G is aimed to reduce peak loads on the DNO during high demand, not to export when demand is low and prices for that export are also low. Effectively, V2G doesn't export back to the substation, as it discharges when demand is high, and instead of substation export, actually reduces peak import ...... a good thing for DNO's ..... Shirley?

Also, if it can't cope with 6kW of demand side supply, then does that mean it would fail if two neighbours installed PV and exported at the 3.68kW limit? Especially as that could happen during the classic low demand sunny summer Sunday afternoon - and a solution to that problem is (oh let me think?) V2G which tops up BEV's with low price leccy when supply is high.


Next, given that the nearest PV to me is about 100 houses away, I'd suggest my PV is the only one within an approx 500+ house area, so hardly a high stress area.

Still going ...... the whole area, all house cables, was upgraded in 2011/12 to modern, single house connections (no dual house loops), so hardly old and tired?

And the fun bit, it would melt with 6kW of V2G export, from a property with 5.9kW PV export approval?

Hopefully this is all a mix up, but if not, I'll certainly update so that we all can learn about potential problems in such a move.

Sort of funny, perhaps!

Edit - Oops, just realised that my snarky joke about melting might reflect badly on the DNO if taken seriously, that's not what they said, they said it couldn't cope with the voltage rise ..... which takes us back to the example of two new PV installs, when in other local areas, especially where there is social housing, almost one in two homes have PV.

JKenH

Would one option be to install an export limiting device?

michaels

Martyn1981 wrote: »

So this happened ....... !!!

DNO have turned down the V2G for my house, unless I pay for a £39k 280m cable direct from the substation (about 100m away - maybe they have particularly wiggly trenching?) as the current cable could melt during export (of 6kW).

Slight problem with this, my understanding is that V2G is aimed to reduce peak loads on the DNO during high demand, not to export when demand is low and prices for that export are also low. Effectively, V2G doesn't export back to the substation, as it discharges when demand is high, and instead of substation export, actually reduces peak import ...... a good thing for DNO's ..... Shirley?

Also, if it can't cope with 6kW of demand side supply, then does that mean it would fail if two neighbours installed PV and exported at the 3.68kW limit? Especially as that could happen during the classic low demand sunny summer Sunday afternoon - and a solution to that problem is (oh let me think?) V2G which tops up BEV's with low price leccy when supply is high.


Next, given that the nearest PV to me is about 100 houses away, I'd suggest my PV is the only one within an approx 500+ house area, so hardly a high stress area.

Still going ...... the whole area, all house cables, was upgraded in 2011/12 to modern, single house connections (no dual house loops), so hardly old and tired?

And the fun bit, it would melt with 6kW of V2G export, from a property with 5.9kW PV export approval?

Hopefully this is all a mix up, but if not, I'll certainly update so that we all can learn about potential problems in such a move.

Sort of funny, perhaps!

Edit - Oops, just realised that my snarky joke about melting might reflect badly on the DNO if taken seriously, that's not what they said, they said it couldn't cope with the voltage rise ..... which takes us back to the example of two new PV installs, when in other local areas, especially where there is social housing, almost one in two homes have PV.

I hope you never boil the kettle while the electric shower is on.....

I have just started the process, hopefully my 3.68kw PV export won't also rule me out.

joefizz

Martyn1981 wrote: »

So this happened ....... !!!

You are thinking of you in isolation Martyn.
Maybe they have already approved the maximum allowable for your substation given local loads?


Its something not a lot of people consider although Ive mentioned it quite a bit, its about local network planning, not just point to point. The cost might be to cover direct connection to the substation then onwards to elsewhere rather than distribute locally along the cables you and whoever are connected to. It wouldnt take much more than a couple on local to cause problems. As Ive mentioned before all this tracks voltage and frequency so if it becomes the de facto supply rather than smoothing then it will be a problem.

Martyn1981

joefizz wrote: »

You are thinking of you in isolation Martyn.
Maybe they have already approved the maximum allowable for your substation given local loads?


Its something not a lot of people consider although Ive mentioned it quite a bit, its about local network planning, not just point to point. The cost might be to cover direct connection to the substation then onwards to elsewhere rather than distribute locally along the cables you and whoever are connected to. It wouldnt take much more than a couple on local to cause problems. As Ive mentioned before all this tracks voltage and frequency so if it becomes the de facto supply rather than smoothing then it will be a problem.

Seems highly unlikely and also the reverse of the problem as, as I explained, no other PV anywhere near, and V2G is actually a tool to help with high demand (when voltage will be dropping) not low demand export.

[Edit - I should have said V2H too, as that does the same by peak lopping during high demand for that one property, whilst V2G hopefully does it for a small number of additional properties too (per V2G). So both support the DNO and local substation due to their role and export/consumption timings. M]

Prior to this, I spoke to the DNO about a house fuse upgrade (being done next week) and chatted with them about V2G, and they confirmed that it's seen as a potential way to help them, not hinder them, as it would support high demand periods, and potentially soak up low demand SSEG exports.

Also, you seem to have gotten it backwards regarding your comment about my seeing it in isolation, my whole post and discussion with OVO is the exact opposite - as explained, if the local supply lines couldn't cope with 6kW of export, then that would exclude any more PV being installed, of which there is zero (excluding mine), yet a mile to the west where a new build townhouse complex of approx 100 properties has been built, all have PV, and a mile to the east, where there is a lot of older social housing, approx one out of two houses (50 out of 100) have PV.