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ALL ABOUT POWER SUPPLY

The type of charge point, cable or portable charger you choose will determine the rate of charge of your vehicle. Likewise the power supply to a charger will determine how it operates. Here is a short guide to power supply basics.


Types of power supply.

UK homes typically have a single phase AC power supply which allows electric vehicle charging of up to 7kW which is enough to keep a modern ev topped up for everyday use. To charge at a rate above 7kW we need to have a 3 phase power supply which will then allow charging at up to 22kW. Charging at 22kW will of course dramatically cut the time it takes to charge your vehicle and is perfect for multi car households but unless your home is already fitted out with a 3 phase supply it can be pretty expensive to upgrade to the more powerful supply.


How to tell what power supply you have.



Normally the easiest way to check if you have a single or 3 phase or single phase supply would be to locate your electricity meter or control box.

In this image the grey box on the bottom left shows 3 large service fuses. This indicates that this home has a 3 phase power supply. If you see a single service fuse then you have a single phase supply.






DC fast charging


For charging above 22kW your vehicle will need to charge using DC (Direct Current) power which is now becoming more readily available in public charge points throughout the country. With the current technology DC charging is by far the quickest way to charge your car albeit not the best for your cars battery. Rapid DC charging is great for road trips as you can top up your cars battery in increasingly shorter periods and so stopping for a coffee and getting a full charge is now the norm. For daily use your car much prefers to charge at a nice slow rate overnight and thats why charging at home overnight is much better for your car. The software in modern cars protects the battery pack really well and the odd fast DC charge will not do any harm but definitely should not be an every day event.




Teison Portable

The Teison portable range use AC power but as the title would suggest they are completely independent and can plug into a domestic power socket or CEE socket.


Chargers such as the Teison 32amp CEE portable can charge at 7.4kW and so make them really useful for both traveling or charging at home if you do not have a charge point installed.

A domestic 3 pin plug charger will typically charge at about 3kW in a standard 13amp Uk home system

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