Excessive energy bill - e-on (sainbury's fixed tarrif until 2023) - please advise best steps

markin

wakkaday said:

HOOVER HHCH 152 EL Chest Freezer - White

The additional freezer I have . Energy rated f 
https://www.currys.co.uk/products/hoover-hhch-152-el-chest-freezer-white-10228942.html

Annual Energy Consumption (Kwh)	208

Not that bad, 0.569 kwh a day

wakkaday

Also with the car, I'm just thinking are my calculations right 

battery capacity is 10.8 officially (nominal rating 7.7khw)

I am Charging via 3 pin plug adapter and get around 9 miles when charged. (I know pointless)

So it will take around 5 hours to charge.

Using an online calculator
https://www.sust-it.net/energy-calculator.php?kwh_cost=0.28&kwh_curr=GBP


it says it will cost me around approx  £11 to charge 

That's £1.22 a mile roughly lol, unless I have got it wrong but more importantly this may also be adding to my bill ??

i suppose it makes no difference whether you have a fast charger or slow charger at home does it? As cost is the same Khw?

laidbackgjr

wakkaday said:

Also with the car, I'm just thinking are my calculations right 

battery capacity is 10.8 officially (nominal rating 7.7khw)

I am Charging via 3 pin plug adapter and get around 9 miles when charged. (I know pointless)

So it will take around 5 hours to charge.

Using an online calculator
https://www.sust-it.net/energy-calculator.php?kwh_cost=0.28&kwh_curr=GBP


it says it will cost me around approx  £11 to charge 

That's £1.22 a mile roughly lol, unless I have got it wrong but more importantly this may also be adding to my bill ??

i suppose it makes no difference whether you have a fast charger or slow charger at home does it? As cost is the same Khw?

If it's 10.8 kW battery and you pay 28p per kwh it will cost £3.02 to fill and that works out at 33p a mile. Which depending upon the fuel used and fuel consumption is possibly cheaper than filling up with fuel. 

But your range is less than 1 mile per kw which is very poor, should be more like 3 or 4 miles per kw.

pochase

wakkaday said:

Also with the car, I'm just thinking are my calculations right 

battery capacity is 10.8 officially (nominal rating 7.7khw)

I am Charging via 3 pin plug adapter and get around 9 miles when charged. (I know pointless)

So it will take around 5 hours to charge.

Using an online calculator
https://www.sust-it.net/energy-calculator.php?kwh_cost=0.28&kwh_curr=GBP


it says it will cost me around approx  £11 to charge 

That's £1.22 a mile roughly lol, unless I have got it wrong but more importantly this may also be adding to my bill ??

i suppose it makes no difference whether you have a fast charger or slow charger at home does it? As cost is the same Khw?

7.7KW will be what you are charging, not the battery size. 

You don't need complicated calculations, the cost is just the 7.7KW by your unit rate of 26.54p. So the cost is £2.04 and not £11. So a mile does cost you 23p not £1.22 based on the 9 miles for 7.7KWh.

What type of car do you have, the 9miles for 7.7KW sounds wrong, as said above it should be more like 3miles per KWh

Do you maybe heat your car before driving using the battery? For EV you can cool or heat a car a few minutes before starting your drive, which of course uses energy.

MattMattMattUK

Remember that battery charging is not 100% efficient, depending on the outdoor temperature charging an EV can range from 90-99% efficiency, though in general in thr UK because we do not have weather extremes you should get a minimim of 95% and likely higher.

Alnat1

The Hoover chest freezer when new used around 208 kWh. If it is now several years old it may be using a lot more. An energy monitoring plug on it for 48 hours or so should give you a better idea.

I learned my lesson as our 14 year old American fridge freezer was using 3 x the advertised energy, a third of our annual use. It is now an ex-FF and has been replaced with a smaller energy efficient FF.

matt_drummer

laidbackgjr said:

But your range is less than 1 mile per kw which is very poor, should be more like 3 or 4 miles per kw.

Not from a plug in hybrid.

They are a compromise and not very efficient.

It also sounds like this battery is seriously degraded, these type of batteries lifetime is based on charging cycles and how heavily they are charged and discharged.

A plug in hybrid has a small battery, it is charged and discharged at a higher rate compared to the battery size of that in a fully electric vehicle.

I charge my Tesla twice a month to 80%, if you charge a hybrid every day its battery will last at best fourteen times less than my car but in reality it will probably last even less time.

I average just over 4 miles per Kwh in 2 years with my Tesla, I get six to seven miles per Kwh in the good weather.

Plug in hybrids are a silly idea, the worst of both worlds.

wakkaday

pochase said:

wakkaday said:

Also with the car, I'm just thinking are my calculations right 

battery capacity is 10.8 officially (nominal rating 7.7khw)

I am Charging via 3 pin plug adapter and get around 9 miles when charged. (I know pointless)

So it will take around 5 hours to charge.

Using an online calculator
https://www.sust-it.net/energy-calculator.php?kwh_cost=0.28&kwh_curr=GBP


it says it will cost me around approx  £11 to charge 

That's £1.22 a mile roughly lol, unless I have got it wrong but more importantly this may also be adding to my bill ??

i suppose it makes no difference whether you have a fast charger or slow charger at home does it? As cost is the same Khw?

7.7KW will be what you are charging, not the battery size. 

You don't need complicated calculations, the cost is just the 7.7KW by your unit rate of 26.54p. So the cost is £2.04 and not £11. So a mile does cost you 23p not £1.22 based on the 9 miles for 7.7KWh.

What type of car do you have, the 9miles for 7.7KW sounds wrong, as said above it should be more like 3miles per KWh

Do you maybe heat your car before driving using the battery? For EV you can cool or heat a car a few minutes before starting your drive, which of course uses energy.

porche cayenne hybrid 
I don't pre heat the car etc 
but the mile range is officially poor in the first instance 

pochase

Official is 14miles, so a bit less than 2 miles per KWh, real world would be than 1 to 1.5miles.

Running it on petrol instead of charging it would not really do you a lot of good, you would just move the cost from your electrcity bill to your petrol bill. Short distances the electricty cost should still be cheaper than petrol.

MattMattMattUK

matt_drummer said:

laidbackgjr said:

But your range is less than 1 mile per kw which is very poor, should be more like 3 or 4 miles per kw.

Not from a plug in hybrid.

They are a compromise and not very efficient.

They can be, but it depends on how one uses them, as with most.

matt_drummer said:

It also sounds like this battery is seriously degraded, these type of batteries lifetime is based on charging cycles and how heavily they are charged and discharged.

It could be, or that the car us in the wrong mode, or that the poster misunderstood the charging and was thinking it was a full charge every time rather than just topping up.

matt_drummer said:

I charge my Tesla twice a month to 80%, if you charge a hybrid every day its battery will last at best fourteen times less than my car but in reality it will probably last even less time.

I average just over 4 miles per Kwh in 2 years with my Tesla, I get six to seven miles per Kwh in the good weather.

That is a car with a 60-100kWh rated battery in one of the most advanced electric road cars, it is always going to be at the top end of electric performance. It also carries a proportionately higher cost.

matt_drummer said:

Plug in hybrids are a silly idea, the worst of both worlds.

They have their place, those who often do sub 30 miles a day but need the flexibility of longer journeys and without the cost of a fully electric car. With a PHEV I could commute for free (charge at work) but have the ability to use the petrol engine for longer journeys I could get something perfectly adequate for £25k, but for a Tesla I would be looking at £50k+.