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  • Electric Vehicle Charging 1

    Electric Vehicle Charging 1
  • Electric Vehicle Charging 2

    Electric Vehicle Charging 2
  • Electric Vehicle Charging 3

    Electric Vehicle Charging 3

Electric Vehicle Charging

If you have a plug-in electric vehicle you will almost certainly need a charging point at your home.

You will need a drive way or garage so that your car is not on the public highway, but if you have access to off-road parking, it is relatively simple and inexpensive to fit a suitable charging point. Indoor and outdoor versions are available.


For domestic installations there are two different capacity points depending upon how fast you want to or can charge your car. The difference in price and installation cost between a slower 16 Amp (3-4 kW capacity) and a faster 32 Amp (7kW capacity) point is so small that there is little point in installing a 16A point for most people even if the car you have will only currently charge at 16A. 

Newer vehicles have higher charging capacities and public charging capacity and speed of charging is already an issue. As a result, the existing slow charge points are rapidly being replaced with Fast or Rapid chargers (up to 43kW using AC and 50 kW using DC).

The car you buy will determine what type of connector you need at the car end of the cable. Where you have a choice, select a higher capacity 32A cable rather than a slow charge cable even if your car can’t currently use that extra capacity.

Under the Government’s EVHS (Electric Vehicle Homecharge Scheme), if you own a plug-in electric vehicle, a grant is available to assist with the cost of installing a domestic charge point.

From 1st April 2016, the grant covers 75% of the cost of the installation of one domestic chargepoint up to a maximum of £500 inc vat. After the grant has been claimed the total installed cost is likely to be around £360 – 480 inc vat.  

All grants are paid in arrears and have to be claimed by an authorised installer. 
The cost of charging your vehicle obviously depends upon how much you pay for your electricity. Two significant considerations are whether you have a lower rate Economy 7 tariff that will allow you to charge more cheaply overnight and whether you have solar panels or a wind turbine. 

But how much energy do you need to charge an electric vehicle? Taking the worst case, a Tesla Model S with the largest 90kWh battery pack, if charged from ‘empty’ would require 90kWh, which at a typical domestic electricity tariff of 12p/kWh will cost £10.80. Perhaps more useful would be an assessment over time using the likely annual mileage.

A Tesla requires about 35kWh per 100 miles. So over a year where you drive 10,000 miles you would need 3,500 kWh per year – on average about 9-10kWh per day. A smaller car, such as a Nissan Leaf requires about 28kWh per 100 miles and so would require about 2,800 kWh annually or about 7-8 kWh per day. 

On a standard tariff at 12p per kWh The Tesla would cost you about £420 and If you have an Economy 7 tariff, where you are likely to pay about 6p per kWh, so you will save £210. For the smaller Nissan Leaf the annual standard tariff cost would be £336 and using Economy 7 you will save £168 each year.

Whether solar panels will provide you with cheaper charging will depend upon the ‘spare capacity’ of your PV system (the excess generation above your normal demand) and when the car is charged. 

If you are away from home every week day and charging overnight then you will get no benefit for 5 days out of 7. If you happen to work nights and your car is charging all day then you will get more of a benefit. 

 For a best-case scenario, let’s assume there is a 4 kw PV system and that half of the capacity is exported, say 1,800 kWh per year. The maximum possible benefit if all of the power was used is £216 annually, but a more realistic assumption might be that half is used saving £108 each year.

Get in touch and we’ll be happy to help you install your Chargepoint

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