Electric cars

Martyn1981

AnotherJoe wrote: »

Depends how much mileage you do and if you are at home in the daytime. The thing about cheap nighttime rates is that they come with more expensive daytime rates. For me, witha low mileage of 6k miles a year, it would be more expensive.

Wow, you must have some serious daytime consumption if the extra cost for that would outweigh the savings from E7 on nightime consumption and an additional ~1,500kWh for the EV.

The average UK household is about 3,500kWh pa, so let's guess at 3,000kWh of non E7 consumption, though of course, I'd assume that some of that daytime consumption would get shifted to E7 - washing machine, dishwasher, tumble dryer - so perhaps 2,000-2,500kWh of daytime consumption.

gzoom

There was a thread on here a while ago where people thought EVs wore tyres quicker than normal cars due to extra weight/torque.

I just cleaned 20inch wheels before storage for the summer and checked the tread depth.

These tyres have done 20k miles, our EV weighs 2.5 tons, and does 0-60 in sub 5 seconds. The tyres are Michelin Latitude Sport 3, standard fit on many SUVs.

This picture tells you all you need to know about EVs and tyre wear, there is easily another 5k of life left on the tyres, 10K if you really push the MOT limit. So 25-30k tyre life, I would say thats pretty good for any car.

.

Martyn1981

I've changed my mind, I'm getting the TM3 performance and putting the leftover $236k in the bank.

$58,000 Tesla Model 3 Performance vs. $294,250 Porsche 911 GT2 RS — Guess Who Wins

AnotherJoe

Martyn1981 wrote: »

Wow, you must have some serious daytime consumption if the extra cost for that would outweigh the savings from E7 on nightime consumption and an additional ~1,500kWh for the EV.

The average UK household is about 3,500kWh pa, so let's guess at 3,000kWh of non E7 consumption, though of course, I'd assume that some of that daytime consumption would get shifted to E7 - washing machine, dishwasher, tumble dryer - so perhaps 2,000-2,500kWh of daytime consumption.

You're right it is high, maybe because I'm at home in the daytime whereas I'd suspect in many households people are out. Also, my only gas use is heating, not cooking so some of that electric use is substituted by lowered gas use



I could put the dishwasher on at night but i believe DW consumption is fairly trivial.

Washing machine, well that would be hassle to put on at night same for tumble dryer especially since its not a combined unit so I'd have to wait a day between washes.


*The car is about 1,500 kWh.

jimbo6977

i'd love something like a vw yorkshireman but i need it cheap. most peeps only need something like an electric microcar but wont countenance it.

Martyn1981

AnotherJoe wrote: »

You're right it is high, maybe because I'm at home in the daytime whereas I'd suspect in many households people are out. Also, my only gas use is heating, not cooking so some of that electric use is substituted by lowered gas use



I could put the dishwasher on at night but i believe DW consumption is fairly trivial.

Washing machine, well that would be hassle to put on at night same for tumble dryer especially since its not a combined unit so I'd have to wait a day between washes.


*The car is about 1,500 kWh.

For fun, just compared BG's tariff's (went for their cheapest quote on standard and E7)

For 3,500kWh standard rate, the total was £734
For E7 with 1,000kWh E7 and 2,500kWh day rate it was £757

Adding 1,500kWh for EV adds £280 to the standard rate for a new total of £1,014.

Adding 1,500kWh of E7 adds £141 to the E7 tariff for a new total of £898.

So E7 makes far more sense (in this BG based example) to an average leccy consumer adding a 6k mile BEV to their household.

So going back to EV's and E7, I'd expect the average household to switch to a dual meter tariff on purchasing a BEV, even on relatively low mileage like yours, on average mileage (nearer 8,000 miles pa), and certainly for high mileage drivers.


Notes - dishwasher consumption is not trivial, it's around 1-1.5kWh per load, so at a light twice weekly usage, consumption is around 100-150kWh pa.

For washing machine and tumble dryer, E7 households seem to manage, but you could of course use a timer and just run one of them, so washing machine in the evening, then tumbly on E7 at night, or washing machine on E7 in early hours, then tumbly on when you get up.

BTW, I'm also home during the day, average annual consumption is approx 3,000kWh, with import of approx 1,500kWh, PV consumption of approx 1,500kWh, and export of approx 3,000kWh.

gzoom

Our day time use in winter is 4.3kWh versus over 20kWh at night for EV/appliances.

E7 is a no brainer for us.

gzoom

jimbo6977 wrote: »

i'd love something like a vw yorkshireman but i need it cheap. most peeps only need something like an electric microcar but wont countenance it.

You mean something like this??




Looking on eBay you can get one for well under £4k, consider Tesla wants £4k for Autopilot thats a bargain......But I rather walk than drive that thing, nothing to stop you from getting one though .

AnotherJoe

Martyn1981 wrote: »

Notes - dishwasher consumption is not trivial, it's around 1-1.5kWh per load, so at a light twice weekly usage, consumption is around 100-150kWh pa.

I didnt realise it was so high. I would say mine is on 5 days out of 7(and not light loads i could let wait until its full either). Maybe I'm a messy cook. So that would be more like 400-500kWh pa for me. So thats getting on for 10% my annual load (ignoring car)
So in my case I reckon E7 use of DW would be a benefit as thats easy to do most times, but if washing machine and tumble dryer were one at night one daytime not they might cancel each other out assuming the loads are similar. I probably use the TD too much (too often but also too long) will make a conscious effort to cut that down.

Martyn1981

AnotherJoe wrote: »

I didnt realise it was so high. I would say mine is on 5 days out of 7(and not light loads i could let wait until its full either). Maybe I'm a messy cook. So that would be more like 400-500kWh pa for me. So thats getting on for 10% my annual load (ignoring car)
So in my case I reckon E7 use of DW would be a benefit as thats easy to do most times, but if washing machine and tumble dryer were one at night one daytime not they might cancel each other out assuming the loads are similar. I probably use the TD too much (too often but also too long) will make a conscious effort to cut that down.

Hiya. You might be able to find the energy consumption for your machine, and for the various washes. We use a half wash, which is actually lower energy than the ECO wash, but that's because we don't stack it in every slot*, so it seems to work fine. then every few months I put it on a long hot wash (when the sun is shining) to make sure the machine itself is fully clean.

*Does anyone put plates in all the slots? We run out of plates, bowls, dishes etc, and if every slot is used it seems a bit jammed up for the cleaning to work well???????

The economics of E7 for most households, or let's say an average household, around 3,500kWh's doesn't look that attractive to me, so it's really down to the addition of the EV. You'd need to do a specific comparison based on your consumption, and the tariffs available to you, to see what does or doesn't work, or where the breakeven point is.

Regarding 'balancing out' of the washing machine/tumbly, again you'd need to compare tariffs, but the basic one I found for BG had these 3 key prices:
non E7 18.7p
E7 day 23.3p
E7 night 9.4p

so the extra is 4.6p, whilst the saving is 9.3p, so there should be an overall gain especially if you worked out which one consumes more energy. At a guess I'd suggest the tumbly, since it has a high constant load, whereas the WM has a high peak, when heating water, but probably a lower average power and therefore lower energy (maybe?)

Apologies for the pedantry, a tricky question for normal households, but I suspect a relatively easy one for EV households.