7kW EV Charger Guide

Written by Charlotte Burrage

23 September 2022

project ev charger wall mounted

Is 7kW EV charger suitable for businesses?

Dependant on each independent business’s situations a 7kw Car charger could be a suitable option for your business. For larger businesses or businesses with multiple cars that must travel often this option is not advised. Due to the slower charging time the 7kW chargers produce. But when looking at a small business that don’t travel often this option could be ideal.

Is a 7kW car charger enough?

There are a few things you should consider when looking at purchasing a 7kW car charger. To understand a 7kW car charger would be enough for you ask yourself these following questions:

  • How many electric cars do you need to charge?
  • How often do you need to charge your car/s?
  • Is speed important for you when charging your car?
  • Are you planning on purchasing more Electric vehicles in the future?
  • Is 8 hours charging suitable for you?

Dependent on your answers to these questions you should be able to determine whether a 7kW charger is enough for your business needs. Usually being used for non-active, single electric car uses.

If you feel that you may need a higher wattage charger, then visit our 22kW charger page HERE

Do you need three phase power for 7kW car charging?

For a 7kW car charger the highest power supply you need is a single phase, this is perfect for both residential chargers and smaller businesses that may not have three-phase power supply. But while you do not need a three-phase power supply, these 7kW installations can still be installed into a three-phase electricity supply if the 7kW car chargers are the best option for you.

What is a single-phase electricity supply?

Single phase power is the most common type of electric power for residential premises. Having a generally lower consistency for the rate the power is supplied. Having both peaks and dips of voltage over the day. Also having 3x less power supplied than a three-phase power supply which is usually adequate for residential premises.

Which 7kW car charger should I use?

Here at Greendawn we offer a large range of EV charger braands to choose from. Some of our most prefered options include: 


How much does it cost to install an electric car charger in the UK?

Depending on a few different factors the cost of installing an electric charger can differ greatly, dependant on: Type of charger, Wattage, number of chargers and is any groundworks must be done to make the build successful. But to help encourage the EV revolution there are many grants and schemes available to help you save money on the installation of the electric car chargers.

For a quote for the estimated cost visit our enquiries page. In which after speaking to you about the goals we will breakdown the prices for every aspect of the EV charger instillation.


What is the difference between a 7, 7.2 and 7.4kW EV chargers?

When looking at the difference between 7, 7.2 and 7.4kW chargers there are some small but noticeable differences for each wattage amount. The biggest difference between the wattages are the speed in which they charge, having the following differences (On average):

  • 7kW- 25 miles charged per hour
  • 2kW- 28 miles charged per hour
  • 4kW- 30 miles charged per hour

All these wattages can charge most electric cars from 0% – 80% in 8 hours or under. With the 7.4kW car charger being able to be used on a single-phase electric supply.


Which electric cars work on a 7kW charger?

Most cars are compatible with a 7kw car charger but dependant of the battery size and OBC (On-Board charger), it may not be efficient for your car to use. For all the statistics around your car visit the EV-Database.

What is an On-Board Charger?

An On-Board charger (OBC) is a system installed into both Hybrid and Electric Vehicles, to charge the vehicle. Converting AC (Alternating-current) into DC (Direct-Current) power. These OBCs will limit the amount of charge that can be pulled from the charger an example of this is the Porsche Taycan, having an 11kW OBC meaning from the 7kW charger it can only receive 7kW at any given time. And while inefficient dependant on your needs for your vehicle, 7kW is more than sufficient.


Can I get an OZEV grant for 7kW chargers?

The simple answer: Yes. When applying for an OZEV grant there is no minimum to the kW of the charger there are other criteria you have to meet, to be eligible for the grant.

Am I eligible for an OZEV Grant?

To be eligible for an OZEV Grant there are a few criteria you must meet. Some of these criteria include:

  • Must be a registered business, charity, or public sector organisation
  • Have a need or intent to use EV equipment (You do not need to own a plug-in EV)
  • Have dedicated off-street parking for staff/ fleet use only.
  • Be located in England, Wales, Scotland or Northern Ireland
  • Own the property or have consent from the landlord for the changepoints to be installed

To see the full list of criteria visit the government OZEV grant page.

How do I apply for an OZEV Grant?

There are a few steps to apply for an OZEV workplace grant.

  1. Fill out Workplace ChargePoint grant on the Government site
  2. Wait to see if application was successful (Up to 5 days).
  3. If the application was successful make a claim with an OZEV approved installer (Like us!) Contact us Page? (Voucher lasts 180 days after application)
  4. Installer will complete the installation and redeem voucher online.
  5. You will then receive a conformation e-mail with details of grant details
    1. If this looks correct then you can ignore the email and allow installer to carry out the work
    2. If it looks incorrect contact workplacechargingscheme@dvla.gov.uk
  6. You pay the installer

Ensure that you keep record for the claim for at least 3 years.

Looking to get started with EV charging, or take your existing set up to the next level? Greendawn provides everything you need.

If your business is looking at EV charging stations for the first time (or is well versed and simply looking for an upgrade) then we have the skills and expertise to make sure your clients, customers, and staff get the EV charging experience they deserve, and that you as a business owner will want to deliver. Contact us now for more information on how to get started with your project.

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