Ev low mileage

Silverbird65

Hi this is really hard to work out. I do 2500 miles a year so charge a out every 3 week's to 80%. I am currently on fixed tariff of 24.28p per kWh and 64.87 st charge. I use 1361 per annum. How do I work out if it's worth changing to IOG. They are asking for 30.17p per kWh and standing charge 67.83.  
I having done anything has car since march this year.
Help would be so appreciated 👍 

lohr500

What make and model of car do you have?
There should be some info available on average miles per kWh.
From that we can work out how many kWh you need to cover your 2500 miles p.a..

What does the 1361 cover? If 1361 is 1361kWh per year then that sounds low for an average UK home, even without any car charging.Does it include the car charging since March?

Silverbird65

Hi 
I have a Renault Megane ev techno 60kw.
That is my using including the charges since march. I am a low user.
That's all the info .
Is that ok?
Thank you for your help

Veteransaver

2500.miles must surely use at least 600-700kWh if you charge only/mostly at home? You must be a very low user of electricity in the house!

Robin9

Am I missing something - I am not an EV user ?

Your new unit rate is 6p more - thats £80 a year

Your new standing charge - 3p more/day thats £10

lohr500

OK, here's a bit of a "back of a fag packet" calculation !!

Auto Express report an efficiency of 3.5 miles per kWh on their long term test for your model of Renault.

So your 2500 miles a year will need 714 kWh p.a./ 59.5kWkh per month.

Charging the car won't be 100% efficient, so lets assume 95% for the purposes of this calculation.

So to get 59.5kWh per month usage from your car battery, you will need to put in around 63KWh per month from your home electricity.

If we assume 3 1/2 months worth of charging since you got the car, then 221kWh of your annual1361kWh went on the car, leaving a base annual usage of 1140kWh for use in the house.

Our start point then for your annual usage is : 

1140kWh for the house
756kWh for the car
1896kWh TOTAL

On your fixed tariff of 24.28p per kWh and 64.87p s/c your annual cost would be (1896x24.28)+(365x64.87) = £697.


What we don't know is how much of your house usage could be shifted to the 6 hour off-peak IOG period.Things like washing machines and dishwashers may have timer options that would let you use them on the 7p per kWh off peak IOG rate.

Excluding the EV charging, lets assume you could achieve 25% of your house usage in the off peak window.

So you would have (1140*.25) + 756 kWh usage at the off peak rate and (1140+.75) kWh on peak. 

This gives 1041kWh off peak and 855kWh on peak.

(1041x7)+(855*30.17)+(67.83*365) = £578

Even if you ended up using ALL your 1140kWh consumption for the house at the peak rate, the IOG cost would be (1140*30.17)+(756*7)+(67.83*365) = £644.

If I have got the calculations correct, then IOG should be a clear winner, even if you use no electricity in the house during the 7p off peak window. The more house consumption you can shift to the 7p window, the more you will save.

I don't know much about IOG, but don't you have to have a compatible charger and vehicle? Have you checked this?

Happy for anyone else to pull my calculation to bits as I'm not 100% sure on my logic!!!

Silverbird65

How kind to go to all that trouble from me. I don't shift elec at night as I only use washing machine once per week. No dishwasher only me, 😭. I ky fridge freezer and internet at night .
Thank you again.

Rodders53

Simple enough to enable 30 minute readings on your smart meter and to find out exactly what you have consumed at different times of day via the Bright App or Octopus app if already with them (or existing supplier app, perhaps?).  Then you can perform some pretty accurate numbers.

I did the same back of fag packet (no I cheated and used a spreadsheet) when deciding if EoN Next Drive was worth having with our new EV and circa 7000 miles per annum (and assuming 2000 would be public chargers on holidays).  It was a no brainer.  Even now when paying peak rate for air conditioning (and no pollen) in the house.

EoN don't support my EV for their equivalent of IOG but it has a 'timer' built in as does the Hypervolt charger I got fitted by my Electrician.  Intelligent Octopus Go is not as simple as EoN with cheap rate 0000-07000 and does need compatible chargers and/or vehicles so check your kit is supported.  {Another supplier OVO has recently dropped support for one brand of EV charger with little or no warning.  So buyer and supplier beware!}

Just over 2500 miles on our XC40 Electric has consumed just under 750 kWh, according to my records (with some 'estimates' where granny charging took place).  Consuming more in cold weather than now it's warmer.

NorthEastLight

Is the 1140kwh estimate above for house use consistent with the annual usage before you got the car?

Is there an exit fee on your current fix or are you within 49 days of it ending?

There are other suppliers of EV tariffs, they tend to be a bit more competitive on day rates than octopus, but shorter cheap window and/or higher cheap rate. If your charging patterns can work with that shorter duration they maybe worth considering.

See mse's list https://www.moneysavingexpert.com/utilities/ev-energy-tariffs/

With EDF GoElectric fix 5 hours cheap window 9p cheap rate, nil house use in cheap window

1140 x 24p national average = £274
756 x 9p =  £68
SC 73p/day (my region)) =£266
Total =£608 vs 644 max on IOG above. Your region results may vary.

What IOG does offer is the potential  opportunity of additional cheap slots during the day if you leave your car plugged in to charge. You may not do enough miles to take much advantage of that.

EDF is working on a similar add on to IOG for its EV tariffs but currently only if you have a compatible car which Renault isn't.

Note IOG is a variable rate tariff that changes every 3 montbs. They did do a fixed rate option for a short period but none are listed currenty..

If fixed rates are important to you EDF, Eon Next or BG are likely better options.

RelievedSheff

I think some of you may have missed this from the OP:

"That is my using including the charges since march"

Which would make the 1364kWh only account for about 3 months consumption, (assuming I have read that correctly of course)

lohr500

RelievedSheff said:

I think some of you may have missed this from the OP:

"That is my using including the charges since march"

Which would make the 1364kWh only account for about 3 months consumption, (assuming I have read that correctly of course)

I factored that into the calculation I did, by removing 3 1/2 months worth of car usage (221kWh) from the 1361 annual usage.