EV charging provision as part of new build planning permission?

Quite.


Nobody is going to run a domestic installation fully loaded all day and night. So when it comes to the main fuse rating it’s not what you’ve got, it’s how you use it.


Coming home at around six o’clock in the middle of the winter whilst electric heating is running full tilt and whacking a couple of cars onto charge will someone is using an electric shower, while a meal is cooking and both a washing machine and tumble dryer are in use is not going to happen.


Andy Betteridge

I suspect the answer to the original post is an IP rated 13-amp outdoor socket fitting on the front wall of the house to fulfil the planning requirements.


Andy Betteridge

Or to look at it another way, the average annual mileage for a car in the UK appears to be around 7600 miles. At say roughly 3 miles per kWh that would be just over 2500kWh a year or just under 7kWh a day.


So a 7.2kW (32A) charge point could do an average 'top up' in about an hour - or if things could be spread evenly over, for instance, the 7 hours of E7 off-peak times, we'd be looking at an additional load on average of 1kW per car.


  - Andy.

The higher mileage drivers will have to charge away from home anyway, even if they have home charging facilities, as they will have to top up to get home.


Andy Betteridge

They will want to charge at home because it is considerably cheaper.   The average consumption of all the cars in the country is not a diversity you can apply to a single street supply Andy. Everyone in some streets tends to be salesmen who drive a couple of hundred miles a day at maximum speed. That is why the infrastructure costs must be included, because the moment it doesn't work the builder is in trouble for non-compliance with the planning conditions.This is a serious charge and could result in him having to update everything at his cost. If I was buying one of these houses I would want a guarantee of adequate supply before parting with my money, as would anyone else buying a "Green" house, probably including a maximum amount of heating energy required.

Hmm. Good point. Also do not lose sight that the word "average" is probably the most dangerous word in the universe, it can be so misleading as to which average you actually mean and often if you do know all the averages etc etc then it`s just about enough sometimes (and sometimes not)

OMS asked above where I got my figures from when I said people could not afford a sixty quid a day electric bill.


Just take the available supply and spread the usage over twenty four hours then you end up with more electric available than people need or can afford to pay for.


What people cannot have is an unlimited on demand supply as and when they want it, so their installations and equipment have to be designed to match the available supply and people will have to change their behaviour.


Andy Betteridge

The average consumption of all the cars in the country is not a diversity you can apply to a single street supply Andy.

Of course not - I wasn't suggesting otherwise - the DNO's don't lay cables into individual homes now based on a 1kW or 2kW assumption, but on the individual max demand (e.g. 80A or 100A) - similarly they don't allow much diversity down a short street. But as you get further out there are considerable savings to be had compared with the assumption that every house is going to need 10kVA or whatever simultaneously - especially if the bulk of EV charging can be co-ordinated - e.g. via smart meters.

 

They will want to charge at home because it is considerably cheaper.  

:

Everyone in some streets tends to be salesmen who drive a couple of hundred miles a day at maximum speed. That is why the infrastructure costs must be included, because the moment it doesn't work the builder is in trouble for non-compliance with the planning conditions.This is a serious charge and could result in him having to update everything at his cost.

You must have some very strange sales people in your area - I've never come across a 'Salesman Ghetto' with hundreds of nothing but salesmen in the same neighbourhood. Come to think of it I've never regarded as sales peoples as the types preoccupied with minimising the cost of motoring either. In any event such situations must be very rare - I strongly suspect developers would just design things as per-normal and if there were any chance of being forced to pay for an additional infrastructure upgrade in future, just take out insurance against the unlikely event. (Or possibly more likely just write into the contract that they're not to be held responsible for such things.)


   - Andy.

You obviously don't live in the south Andy. There are some places where there are many similar together.


However it is not true that DNO cable sizing (and everything else) on new builds is for maximum total demand, The diversity adjusted figure might have crept up a bit but probably not above 2kW. As for the comment by Sparking chip, can you imagine the riots if electricity was switched off to suit the electric vehicle charging of others?: The whole arrangement is so flawed that I wonder at the quality of engineering input to the civil service and Government. In fact I don't because I see the same kind of nonsense in the latest edition of E&T. I have asked who is giving the advice in a number of cases and it is usually considered "confidential". When questioned further and deeper, sometimes with legal paperwork, it becomes clear that the "advisors" have vested interests, particular political views and often come from Universities. Anyone else finds it very difficult to get a word into the place where the policy is made, because we may have a much more pragmatic background with actual experience! You will notice that the BBC keeps getting professors on the news giving views, but in most cases these do not specialise in public health! They parrot the words from the Chief Medical Officer, which is undoubtedly good, but cannot answer a single extra question (although none are usually asked either). Electric everything simply cannot work in this country, but the real question is why is it being pushed so hard? It would be much better to spend the money on medical research and provision than the "Electric future" because at least then all of us would be able to work properly to a good age (more than at present). Anyway it looks as though those wishing to break the world have managed economic disaster in the West, mainly by behaving as though there were no virus and no problem. See the picture of the idiots congregating all over the place over the weekend. You think people will change to have no lifestyle? You will need armed response to get to that place and a police state is not what most of us in Britain want under any circumstances.

There is also an interesting “intelligent” EV charger from a company whose name is two words, each starting with a P. The unit has a CT which is placed round the live meter tail, and adjusts its charging to achieve a set current e.g. 60A. As the house load increases and takes the installation current over the set point, the EV charger will back off its output. 


Regards,


Alan.