UKs National Grid get their retaliation in first

la ultima guagua

https://www.irishtimes.com/business/transport-and-tourism/uk-s-national-grid-warns-on-electric-car-home-packs-1.3192493

Cant be long 'till this is a big eco political issue over there

National Grid will be trying very hard not to be caught picking up the tab for what will need to be done

( note not a word about, for example, additional consumption due to domestic heat pumps )

KCross

la ultima guagua wrote: »

https://www.irishtimes.com/business/transport-and-tourism/uk-s-national-grid-warns-on-electric-car-home-packs-1.3192493

Cant be long 'till this is a big eco political issue over there

National Grid will be trying very hard not to be caught picking up the tab for what will need to be done

They talk about 90kWh cars and 11kW domestic charging and then use that as a basis for an article as if thats normal!!
A tiny minority will be able to afford or need that in this country or the UK.

Its a scaremongering piece, is all.

If you did need 11kW charging you would simply pay for 3 phase which, I think, gives you a 100-120 Amps main fuse so problem solved.

la ultima guagua wrote: »

( note not a word about, for example, additional consumption due to domestic heat pumps )

To be fair heat pumps are well down the pecking order for consumption. They draw similar to a kettle(3kW), just that they are on for longer. Your electric shower (9kW) and your EV (7kW) are the big hitters.

unkel

What a load of scaremongering bull. Nobody has a 11kW charger. And even if they did, it's barely any more powerful than your average electric shower (10kW), of which there are hundreds of thousands in this country alone

zilog_jones

So, the National Grid don't know about priority switches?

BrianD3

Funny that I was actually thinking about this myself yesterday after examining my meter and distribution board

House built in early 1980s
ESB fuse - 60 amp
Distribution board main fuse - 63 amp

I do a daily 200 km round trip commute so let's say I'd need a 40 kWh battery and assume that it needs a full charge every day and that I cannot rely on either workplace charging or public charging.

I leave the house at 7 am and am back at 7 pm so have max 12 hours worth of charging.

12 hours with a granny cable would not be enough. 16 amp charging would be barely enough. 32 amp charging would do it easily.

But would I have to be thinking about not using the immersion, cooker, kettle and or electric fire while the car was charging using a 32 amp charger. I could charge the car from say, 11 pm to 6 am i.e. stop charging as I get out of bed and start boiling kettles and having showers.

What would my options be, how big a deal (expense) is it to upgrade the supply. I wouldn't even need 48 amp charging as mentioned in the OP.

unkel

BrianD3 wrote: »

But would I have to be thinking about not using the immersion, cooker, kettle and or electric fire while the car was charging using a 32 amp charger.

You can use all of them, but not more than about 2 of them at the same time as charging your car at 32A. Also with all EVs you can schedule charging, so just charge your car from 1AM to 6AM when you are asleep and don't need any of the above devices

And if this somehow doesn't work for you, you can have a priority switch installed (not expensive), which will temporarily stop charging your car if you use another heavy use electrical device that needs priority (like a 48A electric shower)

macnab

40kw will charge in just over10 hours at 16a. Id say you would have easily enough range in a 40kw EV to cover 260km so you might only need 75% of the battery to cover 200km. If thats the case then it will require 8 hours to charge at 16a.

cros13

It's a hilariously misleading article... talking about 11kW charging for a Tesla when on single phase they'd pull 5.5kW at worst (16.5kW / 3).

unkel

macnab wrote: »

40kw will charge in just over10 hours at 16a. Id say you would have easily enough range in a 40kw EV to cover 260km so you might only need 75% of the battery to cover 200km.

A bit optimistic, macnab? I.e. Zoe 41kWh only has 200km range in winter (according to Renault themselves). And the whole point about home charging is that you can do it at the cheap night rate, which is only available for 9 hours a day

So it's a very valid situation, that BrainD3 is proposing, in that you really need 32A charging when buying a 2018 or newer EV (with >40kWh battery) if you have a massive commute (of say 200km)

BrianD3

Cool, I wasn't aware of the existence of priority switches. I take the points about how 40 kWh (i'm thinking of the forthcoming Leaf which I hope will have a bit more range than the 41 kWh Zoe) would probably have some "headroom" in terms of range and time to charge at 16 amps. IME headroom and flexibility is needed as schedules can change and things not go to plan. I would find it absurd if say, I was delayed in work, got home late (i.e. had less time for charging for the next day) and then had to restrict myself in terms of cooking,washing or making tea

Re: workplace charging and public charging - this involves relying on others not being idiots and IME this is an unrealistic expectation :mad:. If I had workplace charging the following would likely happen:

-some clown would drive into the charging point and smash it.

-in the event of other technical problems it would likely take weeks for it to be fixed because of a general "computer says no", "that's not my job" and "the person who looks after that is on leave" mentality in my workplace.

And we all know the issues with public chargers being broken, hogged or ICEd.

macnab

unkel wrote: »

A bit optimistic, macnab? I.e. Zoe 41kWh only has 200km range in winter (according to Renault themselves). And the whole point about home charging is that you can do it at the cheap night rate, which is only available for 9 hours a day

So it's a very valid situation, that BrainD3 is proposing, in that you really need 32A charging when buying a 2018 or newer EV (with >40kWh battery) if you have a massive commute (of say 200km)

I think the Ioniq has shown us that better aerodynamics and propperly designed regen brakes can improve EV range greatly. The Zoe unfortunately has neither of those sorted. I am hoping that the next Leaf with its e pedal and better aerodynamics will be a game changer. Optimistic? Always :-)

liamog

If you follow through to the original National Grid Article http://fes.nationalgrid.com/media/1221/forecourt-thoughts-v10.pdf

It's way more nuanced, they talk about 90kWh cars becoming standard, and that 11kW home charging with an upgraded supply is a good compromise as it would take 6 hours to charge from 25% to 100%.

Typical press, taking an inaccurate cliff notes version.

BoatMad

I charge a 30 kWh leaf at 32A ( 6.6 kw charger ) every workday night , 4 hours typically .

One power shower , no priority switch

60 kWh , would likely be about 7 hours , assuming similar tapering charge , again doable well within night rate