Help please! £3000 to Install home charging point for electric car

AdrianC

Steve182 said:

All houses have a 100 amp 1ph supply by default so far as I'm aware.

Yes, we have a 100A incoming fuse.

But our supply still comes from a transformer fused to 200A for eight houses and a farm.

It ain't going to be our fuse that goes ping first if we try to up our consumption too much...

bengalknights

Thats actually a good price for 3 phase, the distrbution company round here are charging considerably more then that for upgrading from single to 3 phase.

The advantages with 3 phase will be in the future with renewables and storage tech.

In your case however though single phase overnight charging would be cheaper.

northwalesd

Ectophile said:
That was true for a while.  Those of us in older houses may only have a 60A supply.  Some could even be lower if it's an ancient system that hasn't been touched for years, but they should be rare now.

Indeed, our mid-70s bungalow has a 60A supply..

Grey_Critic

The idea of home charging at night is to take advantage of cheap off peak rates - people with Storage Heaters do exactly that and they will easily draw 7 amps.

Grey_Critic

Came across this which gives some useful information

https://www.carwow.co.uk/electric-cars/charging-points

oh_really

If the premises has a 3 phase cablehead would this change anything/ be beneficial?

hareng

Steve182 said:

All houses have a 100 amp 1ph supply by default so far as I'm aware. Of course you can upgrade if you pay.

I came home at dinner time one day about 16 years ago to find our 100A fuse actually being down rated to a 65A fuse with tamper proof tag, house built in 1984. I did have a dig as i ran 7.5kw 1ph to 3ph digital invertor drawing up to the rated 35A. Showers 40A draw, hob actually draws 32A, CH 20A.
I couldnt entertain the idea due to excessively exceeding the 65A input (heating comes on 20A + shower 40A).13A domestic wouldnt charge enough for daily usage from 6pm till 6am over winter/dark, rain, cold nights, motorway, etc where rated range can be halved. At least with my dirty diesel i can fill up every 7 working days, big difference.

ElefantEd

EV range doesn't half in those conditions. It might go down by 10-20%. And even a 13A supply, left charging for 8 hours, would give approximately 25 kwh energy, about 100 miles range at worst. You might have reasons for preferring a 'dirty diesel' but you might as well get your facts straight!

BOWFER

hareng said:

Steve182 said:

All houses have a 100 amp 1ph supply by default so far as I'm aware. Of course you can upgrade if you pay.

I couldnt entertain the idea due to excessively exceeding the 65A input (heating comes on 20A + shower 40A).13A domestic wouldnt charge enough for daily usage from 6pm till 6am over winter/dark, rain, cold nights, motorway, etc where rated range can be halved. At least with my dirty diesel i can fill up every 7 working days, big difference.

Range halved?
Where on earth are you getting that from?

BOWFER

DrEskimo said:

Cisco001 said:

How many car have you got in your household?

Are you going to stay there for another 10 - 15 years?

EV car will become more popular.
If you have 2 EV cars in future, having one socket which need to charge 8 hrs each may not practical? 

Whilst convenient, it's a bit of a luxury that is difficult to justify given the cost.

How long you charge depends on your typical daily mileage. You don't run them both until empty and then decide to charge both of them for many hours (I don't think I have ever charged my car for 8hrs....). I typically just give it a top up for a few hours over the evening when I need it, typically from 30-80%. 

The idea that two people with 2 EVs are doing the entire max range of the car that both require 8hrs charging (would equate to both doing around 150miles every day) to necessitate the need for a load sharing, 3-phase charger seems to be a remote one....

More likely you just both alternate, or if really needed, one plugs in a charges when they get home, then switch it around so the other charges over night before they go to bed.

I've got an EV, we're changing my wife's Evoque to an EV as soon as we can (although it leased, so not so easy to change).
Still, we've discussed the two car charging thing and you've hit the nail on the head.
We'll just alternate charging as required.