EV Charger FAQ
EV chargers are now a common sight in homes and businesses across Yorkshire, and a question that we get a lot is, “Can anyone have a charger?”
Well, it’s not a straightforward answer!
There are certain criteria that need to be assessed first, and sometimes we need permission from the Distribution Network Operator (DNO) before we can start any work. Additionally, there are other elements which need to be considered. Below, we answer your EV frequently asked questions.
What is looped power supply?
A looped supply is when your property is ‘looped’ to another property on the same cable. This means that the power supply is shared between the properties. A tell-tale sign that you are on a looped supply is that you will have 2 supply cables at your main cut-out fuse, although this is not always the case (see picture opposite).
If your property is on a looped supply, then you must obtain permission to install an EV charger from the Distribution Network Operator (DNO). In Yorkshire, this is generally Northern Powergrid, although there are other network providers.
If you choose to work with us, then we can contact the DNO on your behalf. For this, we would need a signed letter of authority allowing us to act for you, although you are able to deal directly with the DNO if you prefer. In most cases, a new cable will be installed. This may involve the road/driveway being dug up, but this generally is not chargeable work to you directly but is covered by the network provider. This process can take up to 16 weeks, so if you are planning to have an EV charger fitted, take this into account.
What DNO permissions, notifications and maximum demands do I need to consider?
There are two types of EV chargers on the market: those that use a so-called “current transformer” (CT) and those that do not. A CT monitors the overall electricity usage of your home at any one time, and if needed, ramps down the electricity used for charging the car to protect the main fuse and cables. For instance, if you turn on the kettle, microwave and oven all at the same time, your home will use a lot of electricity - but how much is too much?
Your home will have a main fuse, and its rating will vary. If it is rated at 60A (Ampere), that means if you use more than this, the fuse could blow, leaving your home without electricity. To avoid this, electricians calculate the maximum demand of your property using something called “diversity” (this is a little technical, but we’ll explain this as best we can).
An EV charger uses 32A for long periods of time and has a zero-diversity factor, which means, when it’s on, it’s on. This also applies to immersion heaters and electric showers. The diversity calculation is different for things such as sockets, lights, and ovens, which typically fluctuate in how much they use. For example, you can use one hob, or all four of them.
Considering this maximum demand means that if your EV charger is on, and then you have a shower, you could be using over 60A - and that’s without anything else being turned on in the house.
To avoid any fuses blowing, this is where a CT comes in. The CT will monitor the house’s electricity usage and will reduce how much the EV charger is using so that the main house fuse is protected. The maximum regulatory setting for this is 60A.
Do I need DNO permission for EV charger with a CT?
There are also rules when it comes to CT usage and the maximum demand of your property. You must apply for permission from the DNO to install an EV charger if your maximum demand is 60A or over (and this includes the proposed EV charger). If your maximum demand is under 60A with the EV charger, then you do not permission beforehand.
Do I need DNO permission for EV charger without a CT?
If your EV charger does not have a CT, then the rules are different again. You must apply for permission to install this type of charger, although we always recommend that you use an EV charger with a CT supplied.
What consumer unit specifications do I need for EV chargers?
Due to the continual updating of electrical regulations, what was once deemed satisfactory, now may fall into the non-satisfactory category. Older consumer units with a type AC RCDs (this is a technical change which we can explain during a site visit) fitted are non-compliant for EV chargers. Also, consumer units with dual RCD’s (consumer units that contain two separate RCD units) cannot be used for EV chargers as they must individually protected and be double pole (Regulation 722.531.3.101 and 536.4.1.4, respectively).
In addition, Surge Protection Devices (SPD) must also be fitted with EV chargers. Therefore, in most cases, a new small consumer unit is fitted, in addition to your existing unit, to accommodate an EV charger.
What testing and certification are needed for EV chargers?
Once your EV charger is installed, it must be tested with a calibrated EV tester. This tester checks all the functions of your EV charger and can simulate a fault condition.
They are also the only testers that can test the Residual Direct Current Detecting Device (RCD DD) which is present in your EV charger.
When we perform such tests, we record all our results, which are then displayed on your electrical certificate.
Who needs to be notified about an EV charger?
It is also mandatory to notify the local building control that you have had an EV charger fitted, along with the DNO. Once the DNO has been notified, you will receive a letter to acknowledge this (see example to the right).
If you choose to work with us, we will perform all these notifications on your behalf.
What is OZEV?
The Office for Zero Emission Vehicles (OZEV) is part of the Department for Transport and Department of Business, Energy & Industrial Strategy and has been set up by the government to manage and oversee the UK’s transition from predominantly combustion engine vehicles to electric vehicles.
Are there any EV grants available?
OZEV offers grants starting from £350 towards the cost of installing a new EV charge point. These grants are separated into the Electric Vehicle Home Scheme (EVHS) and the Workplace Charge Scheme (WCS). If you fulfil the required criteria, set out by OZEV, then you may be able to claim £350 towards the cost of an EV charger installation. This includes, but is not limited to, living in rented accommodation and whether you are a business.
In summary
We hope you now have a better understanding about whether you can have an EV charger or not.
But if you still have questions or want to know more, just give us a call.
If you want to learn more about the cost differences between an EV and internal combustion engine (ICE) car then take a look at our comparison in our case studies section.
We are always happy to answer questions that you have, so please get in touch!
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Call for a Consultation
During the call, we will learn more about what you are looking for and what your project needs are.
You can also email us at info@neutralelectricalsolutions.com.
Why Install an EV Charging Point?
Convenience
Installing an EV charging point at home or the workplace offers unmatched convenience. You can easily charge your vehicle overnight or while you're at work. This means more time on the road and less hassle trying to plan your trips around charging stops.
Save on Energy Bills
Charging your electric vehicle at home or work is more cost-effective compared to traditional fuel. You can take advantage of lower electricity rates, especially with off-peak tariffs, significantly reducing your energy costs over time.
Increase Property Value
As the demand for electric vehicles continues to rise, homes and businesses equipped with EV charging points are becoming more attractive to buyers and tenants. Installing a charging point can increase the appeal of your property and its market value, making it a worthwhile investment for the future.
Eco-Friendly
Electric vehicles produce zero emissions, and installing a charging point supports a greener, more sustainable future. By making the switch from traditional combustion engines to electricity, you contribute to reducing carbon emissions, air pollution, and your overall carbon footprint, helping combat climate change.
Call for a Consultation
During the call, we will learn more about what you are looking for and what your project needs are.
You can also email us at info@neutralelectricalsolutions.com.