Basically you will get 6.6 Per hour on a 7 Kw and 3.6 per hour on a 3KW, provided the Leaf has the optional 6.6 onboard charger installed.

The cost will be the same regardless per unit from your electricity supplier it's just the speed it goes into the leaf at.

 

First of all units:

kW (kilowatt) is a measure of power e.g. how fast you are putting energy into the car.

kWh (kilowatt hour) is a measure of how much energy you have/can put in the car. (You also pay for your electricity by the kWh)


If you charge at 6.6kW for 1 hour you will have put 6.6kWh of energy into the battery (6.6kW x 1h = 6.6kWh)


The 30kWh Leaf allows you to actually use about 27kWh of it's battery. It keeps 3kWh in reserve to protect the battery.

If you charge the car from completely flat at 6.6kW then it will take approximately

27 kWh / 6.6kW = 4.1 hours*

If you charge the car from completely flat at 3.6kW then it will take approximately

27 kWh / 3.6Kw = 7.5 hours*

*It actually takes a bit longer than this because the car does some cell balancing at the end of the charge.



The cost will be basically the same whether you charge at 3.6kW or 6.6kW because you are still putting 27kWh into the car.


If you pay 12p per kWh for your electricity it would cost 12p/kWh x 27kWh = 324p (£3.24) to charge your car from empty.


As standard the 30kWh Leaf comes with a 3.6kW charger but an optional 6.6kW charger could be specified when ordering the car.

 

To try and answer your question in simplistic terms on my switchable Rolec charge point. On the 7Kw settings I use on average about 21 units but it can be as high as 23 units. This normally takes about 4 hours give or take 10 minutes. On the 3 Kw setting the number of units is about the same and the time is about 8 hours (never take much notice of this as I normally do it overnight so time isnt the concern). I'm currently paying iSupplyEnergy 11.5 pence per Unit.

 

To work out costs you need to estimate how many miles you will do a month.

If you are doing a long daily commute and nobody is home during day, it may work out cheaper to move to to E7. Let us know your miles and we can help.

 

Gents Thanks

I will do 110 a day wife is home in the day also has gas heating

 

Just checking - you know that the 30kWh Leaf will not reliably do 110 miles on a single charge apart from in perfect conditions and driven gently? You will need to charge en route or at work if your daily commute is 110 miles.

 

I can charge at work 55 miles away

 

Perfect. You will get somewhere between 3 and 5 miles per kWh from the Leaf depending on weather and how fast you drive. You can work out the approximate number of kWh you will use per day/week/etc. from that.

 

That commute gives a great saving with the Leaf especially if charging at work is free?

There is losses in charging, so if the car says you got 4.0 miles/kWh it takes more from the wall, but your 55 miles will use around 14kWh a day. You will probably use the car sometimes in evening and weekends too, so I would expect you to use around 400 to 500kWh a month charging.

If you know what kWh electric you use a month before Leaf, then you can compare standard vs. E7 costs by just using the car charging as your off-peak use.

You might also be able to save more by scheduling appliances. We now use the timer on the dishwasher and washing machine so they run on E7 too

We are actually on TIDE but it isn't great for new customers.

 

But take care when looking at E7 for overnight charging because the day rate usually goes very high and it is easy to actually lose money by going E7. You need to do some maths using the two rates and the day and night usages. It is frequently not worth the switch. Much better to move to a cheaper overall rate supplier in the first place. Look at Outfoxthemarket's rates.

 

Cheers guys very very informative here I will look into it tonight

 

That commute gives a great saving with the Leaf especially if charging at work is free?

There is losses in charging, so if the car says you got 4.0 miles/kWh it takes more from the wall, but your 55 miles will use around 14kWh a day. You will probably use the car sometimes in evening and weekends too, so I would expect you to use around 400 to 500kWh a month charging.

If you know what kWh electric you use a month before Leaf, then you can compare standard vs. E7 costs by just using the car charging as your off-peak use.

You might also be able to save more by scheduling appliances. We now use the timer on the dishwasher and washing machine so they run on E7 too

We are actually on TIDE but it isn't great for new customers.

The Nissan connect app or web site should give you details of your power usage and mileage once you get started. You should consider E7, roughly, if half your power or more is going into the car.

I'm supposed to be on TIDE too, but they don't seem to be able to get my smart meters working.

 

I'm supposed to be on TIDE too, but they don't seem to be able to get my smart meters working.

We are on TIDE and so far two missed appointments! Not complaining too much as was WFH those days and got £30 each time. Also longer it takes to be installed (we have E7 meter) we aren't paying peak rate. 14 months so far

 

We are on TIDE and so far two missed appointments! Not complaining too much as was WFH those days and got £30 each time. Also longer it takes to be installed (we have E7 meter) we aren't paying peak rate. 14 months so far

The meter guys turned up fine, twice. But having installed the meters now about 2 months ago they still don't seem to be getting any readings from them. The real time display on my mantle-piece is working fine but, AFAIK, they still have no way of measuring how much power I'm taking.