Can My Consumer Unit Handle an EV Charger?
With more homeowners switching to electric vehicles, one of the most common questions we hear is:
“Can my existing consumer unit handle an EV charger?”
In recent years, EV charger installation requirements have changed significantly. Modern EV chargers now require dedicated Type A RCD or RCBO protection, along with other safety measures such as surge protection considerations, load balancing and PEN fault protection.
Your consumer unit may even have been replaced or upgraded within the last few years, but with the increasing use of electric vehicles, LED lighting, induction hobs and other modern electronic equipment, it has been found that older AC type RCD protection is not always suitable for some modern electrical installations. Small amounts of DC current leakage produced by EV charging equipment, LED lighting, induction hobs and other modern electronics can potentially affect older AC type RCDs, preventing them from operating correctly in the event of a fault.
Because of this, modern EV charger installations now require Type A protection instead.
One of the first things we check during an EV charger quotation is whether the existing consumer unit is suitable for the additional load and protection requirements of the installation.
At RW Currion Electrical, we carry out EV charger installations across Banbury and the surrounding villages, assessing existing electrical installations to ensure they are safe and compliant with current BS 7671 wiring regulations.
Signs Your Consumer Unit May Need Upgrading
During EV charger quotations and installations, some common issues we come across include:
• Older rewireable fuse boards
• Consumer units with no spare ways available
• Older split-load boards without suitable protection
• No surge protection device (SPD) installed
• Signs of overheating or previous electrical faults
• Inadequate earthing or bonding arrangements
• Older installations that may not meet current regulations
This does not always mean a full consumer unit replacement is required, but additional work may sometimes be recommended before an EV charger can be safely installed. However, where an older rewireable fuse board is present, we would normally recommend upgrading to a modern consumer unit with appropriate protection.
In some cases, a separate mini consumer unit can be installed for the EV charger. Where the existing consumer unit is a long distance from the preferred charger location, a weatherproof consumer unit may also be installed and supplied directly from the meter position to provide a practical and compliant solution.
Do EV Chargers Need Their Own Circuit?
Yes. EV chargers should be installed on their own dedicated circuit directly from the consumer unit.
This helps ensure the charger is correctly protected and prevents overloading existing circuits within the property.
Unlike many other high-power electrical appliances within a home, EV chargers often operate continuously for several hours at a time, particularly during overnight charging. For example, an electric shower may only be used for a few minutes at a time, while an oven or hob may typically operate for a couple of hours. An EV charger, however, may draw a high electrical load continuously throughout the night.
Because of this sustained demand, EV chargers require their own correctly designed and protected circuit.
As a new circuit is being added to the electrical installation, EV charger installations also fall under Part P of the Building Regulations and should be carried out by a suitably qualified and registered electrician able to test, certify and notify the work where required.
Modern EV charger installations will also typically include:
• RCBO protection
• Surge protection
• Load balancing
• PEN fault protection (depending on charger type and installation)
• Full testing and certification
• Part P notification where required
Do EV Chargers Need Surge Protection?
You may have heard electricians mention surge protection when discussing EV charger installations or modern consumer units.
Modern EV charger installations require surge protection within the consumer unit. EV chargers and electric vehicles contain sensitive electronic components and smart charging technology which can potentially be affected by transient overvoltages caused by switching surges or lightning-related disturbances on the electrical supply.
In recent years, surge protection devices (SPDs) have become far more common within domestic consumer units, particularly where modern electronic equipment such as EV chargers, electric vehicles, LED lighting, smart home systems and induction hobs are installed.
At RW Currion Electrical, surge protection is included as part of our EV charger installations to help provide additional protection for both the EV charger, the vehicle itself and other sensitive electronic equipment within the property.
During EV charger quotations, we also check whether surge protection is already fitted within the existing consumer unit and whether any upgrades may be recommended as part of the installation.
What Should Homeowners Check Before Having an EV Charger Installed?
As EV charger installations involve adding a new high-load circuit to the electrical installation, homeowners should ensure they use a fully qualified and Part P registered electrician able to properly test, certify and notify the work where required.
Modern EV charger installations involve far more than simply mounting the charger onto a wall. EV chargers place a high continuous demand on the electrical installation, often operating for several hours overnight, and must comply with current BS 7671 wiring regulations.
Homeowners should also be aware that some national EV charging companies advertise very low “starting from” installation prices online. In some cases, installation work may then be subcontracted out to installers covering large areas, where additional costs may apply later for items such as consumer unit upgrades, surge protection, long cable runs or additional electrical work.
As EV charger installations have increased rapidly in recent years, the quality of installations and components used can vary considerably. We occasionally come across EV charger installations where protective devices have failed prematurely or where the existing electrical installation was not ideally suited to the charger requirements.
Before installation, the electrician should check:
• Whether the existing consumer unit is suitable for the additional load
• If the EV charger circuit can be correctly protected using a Type A RCBO
• Whether surge protection is fitted within the consumer unit
• Earthing and bonding arrangements within the property
• Whether load balancing may be required
• The cable route between the consumer unit and charger location
• The distance from the charger to where the vehicle is normally parked
• The overall condition and suitability of the electrical installation
In some cases, upgrades to the consumer unit, surge protection or earthing arrangements may be recommended before the EV charger installation can safely take place.
Looking to install an EV charger at home?
RW Currion Electrical installs safe, reliable EV chargers across Banbury and the surrounding villages, with the correct protection, testing, certification and DNO notification where required.
• Experienced and qualified electrician with specialist knowledge of EV charger installations
• City & Guilds 2921 qualified in domestic and small commercial EV charging installations
• Fully compliant with current UK wiring regulations, Part P requirements and EV charging safety standards
• Assistance with DNO notification where required, along with upgrades such as dedicated circuits, mini consumer units, RCBO protection and bonding improvements
• Clear, honest advice from choosing the right EV charger through to installation, setup and aftercare
• All work personally carried out by Richard Currion, an experienced electrician serving Banbury and surrounding areas
• Full testing, certification and Part P notification provided for your records after installation
For honest advice on EV charger installations, consumer unit suitability and home EV charging requirements, visit our EV Charger Installation service page or get in touch for a free quote.
Call now: 01295 533378
Mobile: 07740 100378