A garage is often the most convenient place to charge an electric car: it keeps the vehicle close to the house, protects the charge point from the weather and makes overnight charging straightforward. However, garage charger installation requirements are about much more than fitting a unit to a wall. The electrical supply, earthing arrangement, cable route and certification all need to be checked before work begins.
For homeowners in Plymouth, Devon and Cornwall, a proper survey is the best starting point. It avoids unexpected costs, protects your vehicle and property, and ensures the finished installation meets current safety standards.
Start with the electrical supply
An EV charger is a significant electrical load. Even a standard home charge point can draw power for several hours at a time, often when other household demand is high. Your electrician will therefore assess the condition and capacity of the existing installation rather than assuming the consumer unit can simply accommodate another circuit.
The age and type of your consumer unit matter. Older fuse boards may lack the protective devices, spare ways or overall capacity needed for an EV charge point. In some cases, a consumer unit upgrade is the sensible solution. In others, there may be sufficient capacity for a dedicated circuit without wider electrical work.
The charger should normally be supplied from its own circuit, correctly sized for the unit, cable run and anticipated load. This allows the circuit to be protected and isolated properly, without relying on shared garage sockets or extension leads. Charging a vehicle from a standard socket may seem convenient, but it is rarely the best long-term arrangement for regular use.
Load assessment and smart charging
The total demand on the property must be considered. Electric showers, induction hobs, heat pumps, hot tubs and electric heating can all place substantial demand on a supply. A good installer will calculate likely usage and decide whether load management is needed.
Load balancing allows a compatible charger to reduce or pause charging when the house is using more electricity. It can be a practical answer where the supply is adequate but cannot support every high-load appliance running at full power at once. It also helps homeowners make better use of off-peak tariffs without overloading the installation.
Your local Distribution Network Operator may need to be notified about a new EV charge point, depending on the proposed load and connection arrangement. A qualified installer can identify the correct process and deal with the necessary notification as part of the job.
Earthing is a key garage charger installation requirement
A garage charger must have suitable earthing and fault protection. This is particularly important for properties with a PME or TN-C-S earthing supply, which is common in the UK. In certain fault conditions, additional measures may be required to protect someone touching the vehicle while connected to the charge point.
Modern EV chargers may include suitable open PEN fault protection, while other installations need an alternative protective arrangement. The right approach depends on the charger selected and the property’s electrical supply. This is not an area for guesswork or a one-size-fits-all solution.
The circuit will also require the appropriate residual current protection and overcurrent protection in line with the current edition of the Wiring Regulations, BS 7671. The equipment must be selected as a complete system, taking account of the charger manufacturer’s instructions as well as the installation conditions.
Choosing the right location in the garage
The best charger position is not always the closest point to the consumer unit. It needs to be practical for daily charging, allow the cable to reach the vehicle without strain, and avoid creating a trip hazard across the garage floor or driveway.
The charge point should be mounted at a suitable height on a sound surface, clear of areas where it could be knocked by a car, bicycle or stored equipment. If there is a risk of impact, protective bollards or a more sheltered mounting location may be worthwhile. Garages can also be dusty, damp or used for storage, so the equipment needs to be appropriate for the environment.
Cable routing deserves the same care. Cables may need to pass through walls, ceilings, loft spaces or external areas before reaching the garage. The neatest route is not always the safest or most economical route. Your electrician should explain the options, including any surface trunking, underground cable work or making-good that may be needed.
For a detached garage, the distance from the house can affect both the cable size and the overall cost. A longer run may require larger cable to manage voltage drop safely. If the garage already has a small submain, it will need to be assessed rather than assumed suitable for EV charging.
The charger itself must suit the property and driver
Most households choose a dedicated smart charge point, usually rated to suit the property supply and the vehicle’s charging capability. Faster is not automatically better. A higher-rated unit may not offer a meaningful benefit if the vehicle, electricity supply or driving pattern does not support it.
A homeowner who drives modest daily mileage may find overnight charging at a standard domestic rate more than sufficient. Someone with a high-mileage commute, two electric vehicles or limited overnight charging time may need a different solution. Tethered chargers are convenient because the lead is always available, while untethered units can be tidier and may suit households using different cable types.
Where a charger is installed at a home, the unit should meet the applicable UK smart charging requirements. Features such as scheduled charging, connectivity and demand management can be useful, but they should support the way you actually use the vehicle rather than add unnecessary complexity.
Planning, permissions and property considerations
Many domestic EV charger installations can be completed without planning permission, but there are exceptions. Listed buildings, conservation areas, flats, shared parking areas and properties with unusual access arrangements may need further checks before work is booked.
If you rent your home, own a leasehold property or use a communal garage, obtain written permission before installation. The freeholder, managing agent or landlord may have requirements about cable routes, metering, liability and the appearance of external equipment. This is especially relevant where the cable crosses shared land or a communal driveway.
For landlords, an EV charger can be an attractive improvement, but it must be installed safely and documented properly. The property’s wider electrical condition should also be considered, particularly if the EICR has identified issues that need rectification.
Certification is not an optional extra
Electrical work associated with an EV charge point should be designed, installed, inspected and tested by a competent electrician. On completion, you should receive an Electrical Installation Certificate confirming the work has been tested. For notifiable domestic work in England, the relevant Building Regulations notification should also be handled through the correct route.
Keep these documents with the charger instructions, warranty details and any network notification paperwork. They provide a clear record for future electrical work, property sales, insurance queries and fault finding.
A proper installation also includes testing. The electrician should not leave once the charger powers up. Verification confirms that protective devices operate correctly, the earthing arrangements are suitable and the installation is safe to put into service.
What to expect from a professional survey
A site visit should cover the consumer unit, supply capacity, earthing type, proposed charger location and full cable route. It should also consider how you park, where the charge lead will sit and whether future changes are likely, such as a second EV or solar PV installation.
Be wary of quotations based only on a photograph of a garage wall. Remote assessments can be useful for an initial indication, but hidden issues such as limited consumer unit capacity, difficult cable routes or an unsuitable garage supply can alter the scope. A clear written quotation should explain what is included and identify any work that may be needed before installation.
Goodwin Electrical provides practical EV charger advice for homeowners and businesses across Plymouth and the surrounding area, with safety, tidy workmanship and certification built into the process. The right charger is only part of the decision. The quality of the electrical installation behind it is what makes charging reliable every day.