Installing a home EV charger is not just a case of fixing a wallbox to the wall and connecting a cable.
A proper installation needs to consider:
- the property’s electrical supply
- existing household demand
- the consumer unit
- the charger circuit
- earthing and protective devices
- the cable route
- where the car actually parks
- dynamic load balancing
- solar and battery systems
- internet connectivity
- future vehicles
- commissioning and certification
The charger is only the visible part.
A home EV charger installation is not just a wallbox installation. It is an electrical-system design around the car, the property and the grid connection.
And the wider principle is:
A good EV charger installation is the one that safely fits the property’s electrical capacity, puts the charger where the car can actually use it, manages the available power intelligently and leaves the home ready for the way its energy system may develop next.
What Does a Home EV Charger Installation Actually Involve?
A typical installation may include:
- assessing the main electrical supply
- checking maximum household demand
- inspecting the consumer unit
- designing a dedicated charging circuit
- selecting appropriate protection
- checking the earthing arrangement
- planning the cable route
- selecting the charger position
- installing load management where needed
- connecting energy monitoring
- setting up Wi-Fi or other communications
- commissioning the charger
- completing electrical certification
The charger is the visible part. Most of the installation design happens behind it.
Start With a Site Survey
Before choosing the final wallbox position, the installer should understand the property.
That includes:
- where the vehicle normally parks
- where the vehicle charge port is located
- whether the car is normally parked forwards or reversed
- where the electricity meter is
- where the consumer unit is
- the possible cable route
- existing high-power electrical loads
- whether solar PV is installed
- whether a home battery is installed
- whether a heat pump is installed
- Wi-Fi or other connectivity at the charger location
- whether a second EV is likely in future
The best place for the wallbox is found by looking at both the driveway and the electrical installation.
Position the Charger Around the Car
The charger should not simply be fitted to the nearest convenient wall.
The position needs to work with the way the vehicle is actually used.
Consider:
- charge-port location
- normal parking direction
- charging-cable length
- walking routes
- doors and gates
- future vehicles
- possible second EV
- risk of vehicle impact
The charger should be positioned around the real cable route to the car, not simply the nearest convenient wall.
And:
The charger should be easy for the cable to reach and difficult for the car to hit.
How Much Electrical Capacity Does the Home Have?
A standard single-phase home charger may be rated at around 7.4 kW.
At nominal UK voltage, that is roughly 32 A.
That is a significant electrical load.
The home may already contain an induction hob, electric shower, heat pump, immersion heater, home battery charger and other high-power appliances.
A 7 kW EV charger is a major electrical load, even though it may run quietly in the background for hours.
The charger therefore needs to be considered alongside the rest of the property.
Main Fuse Size Is Not the Whole Answer
A homeowner may look at a 100 A service fuse and assume a 7 kW charger can simply be added.
It is not that simple.
The installer needs to assess existing maximum demand, large electrical loads, diversity, service capacity, site limits and load-management options.
The charger rating tells you how much power it could use. Maximum-demand assessment determines how that load fits into the property.
And:
The main fuse tells you something about the connection. It does not tell you everything about how much spare capacity the home actually has.
Who Does What: Supplier, DNO and Installer?
- Electricity Supplier
- Mainly concerned with electricity tariff, billing, smart meter and account.
- Distribution Network Operator — DNO
- Manages the local electricity network and the property's connection to it. Concerned with local network capacity, service connection, additional electrical demand and connection requirements.
- EV Charger Installer
- Responsible for designing and installing the charging system, including circuit design, protective devices, load management, connection process and commissioning.
These roles are often confused.
Your supplier sells the electricity. The DNO manages the connection. The installer designs how the charger safely uses it.
Why Does the DNO Need to Know About an EV Charger?
An EV charger creates additional demand at the property.
That demand also appears on the local electricity network.
The DNO therefore needs to know about EV charging connections so it can confirm the existing connection is suitable, assess local network capacity and identify whether additional work is required.
The charger connects to your house, but the additional electrical demand also matters to the local electricity network.
In a normal installer-led installation, the homeowner should not need to become an expert in network applications.
In a normal installer-led project, the installer should handle the DNO connection process on your behalf.
What Is Dynamic Load Balancing?
Example
Site electrical limit 18 kW. House demand 8 kW. Available headroom 10 kW. A 7 kW charger can run at full power.
Now household demand rises to 14 kW. Available headroom falls to 4 kW.
The charger can reduce EV charging rather than allowing the property to exceed the configured limit.
Dynamic load balancing allows the charger to adjust EV charging power according to what the rest of the property is using.
Dynamic load balancing turns spare electrical capacity into EV charging power instead of reserving a fixed block of the connection for the car.
This means:
The charger does not need 7 kW reserved for it every minute.
Load Balancing Does Not Replace the DNO Process
Dynamic load balancing can help the property use its existing electrical capacity more intelligently.
But it serves a different purpose from the network connection process.
Load balancing can manage the home’s demand, but it does not remove the need for the correct DNO connection process.
One manages the property. The other manages how the property connects to the wider electricity network.
Does the Charger Need Its Own Circuit?
A home EV charger is a substantial and sustained electrical load.
The charging circuit therefore needs to be properly designed.
The installer considers things such as cable size, cable installation method, protective devices, voltage drop, fault protection, isolation and charger rating.
The homeowner does not need to calculate these values.
But it is important to understand that the circuit design is part of the installation.
The charging circuit should be designed for how the cable is installed and how long the EV may draw power, not selected from charger kW alone.
Is a Spare Consumer-Unit Way Enough?
No.
An empty slot is useful.
But the installer still needs to check consumer-unit condition, rating, available capacity, protective-device compatibility, existing installation and circuit arrangement.
An empty way in the consumer unit is only physical space. It is not confirmation that the charger can simply be connected there.
Can an EV Charger Require Consumer-Unit Work?
Yes.
The existing board may be full, old, unsuitable or lacking the necessary protection arrangement.
Possible solutions may include using the existing consumer unit, adding a separate enclosure, making alterations, or upgrading part of the installation where necessary.
Sometimes the wallbox is straightforward but the existing consumer unit is what makes the installation more involved.
What RCD Protection Does an EV Charger Need?
Important
EV charging requires specific residual-current protection.
The exact protective arrangement depends partly on what functionality is already built into the wallbox. Modern chargers may include features such as DC residual-current detection and internal protective functions. That can affect the upstream protective device required at the consumer unit.
EV chargers need specific residual-current protection, and the correct upstream device depends on what protection is already built into the wallbox.
The installer should check the charger's protection specification before choosing the protective devices at the consumer unit.
Does “Built-In Protection” Mean Nothing Else Is Needed?
Not necessarily.
A charger may advertise built-in protection, but that phrase can cover different technical functions.
The installer needs to establish exactly what the charger contains, what standards those functions meet, and what protection is still required upstream.
“Built-in protection” is not a substitute for checking exactly what the charger provides and what the installation still requires.
This is one reason two apparently similar chargers can require different installation arrangements.
Why Is Earthing Different for EV Charging?
An EV is a large conductive object.
It is normally outside, accessible and physically connected to the charging installation.
That creates specific electrical-safety considerations.
EV charging needs special consideration because the vehicle can become part of the electrical installation while sitting outdoors.
The installation therefore needs a suitable method of protection against certain supply-earth faults.
What Is Open-PEN Protection?
Important
Many UK properties use an earthing arrangement where the protective earth and neutral are combined in part of the electricity network.
If that conductor develops a fault, dangerous voltages could potentially appear on exposed conductive parts. EV charging installations therefore need an appropriate method of protection.
The installer must use an approved method of protection against dangerous supply-earth faults such as an open PEN conductor.
Many modern wallboxes include suitable PEN-fault protection internally. Others may require additional equipment or a different design approach.
Does an EV Charger Need an Earth Rod?
Not automatically.
Older discussions about EV charging often suggested that every charger required a separate earth electrode.
That is no longer a useful universal rule.
The correct approach depends on the property’s earthing system, wallbox design, PEN-fault protection and installation method.
An EV charger does not automatically require its own earth rod.
The important thing is that the earthing and protective method are designed correctly.
Two 7 kW Chargers Can Require Different Installations
Imagine two chargers are both rated 7.4 kW.
One may include open-PEN protection, DC residual-current detection and additional metering. The other may not provide the same functions internally.
The charging power is identical. The installation requirements behind the wallbox can still differ.
Two wallboxes with the same charging power can create different installation requirements behind the scenes.
Cable Route Matters
The electrical cable may need to travel along an outside wall, through a garage, through utility space, underground, across a loft, through ducting or to a detached building.
The best route depends on safety, cable installation method, appearance, access, distance and future maintenance.
The shortest cable route is not always the best route, and the neatest route is not always the easiest electrically.
Why Can Cable Route Affect Installation Cost So Much?
Installation cost can increase because of long cable runs, larger cable requirements, trenching, difficult drilling, groundwork, external containment, outbuilding supply upgrades and consumer-unit work.
This means a relatively inexpensive wallbox can still have an involved installation.
The expensive part of some EV charger installations is not the wallbox. It is getting a suitable electrical supply to the right place.
What Does “Standard Installation” Mean?
Many charger packages advertise a standard installation.
That normally means the quoted price is based on certain assumptions. For example:
- limited cable length
- straightforward surface-mounted route
- suitable existing electrical supply
- no significant groundwork
- no trenching
- straightforward wall fixing
- no major consumer-unit alterations
The exact definition varies between installers.
A “standard installation” is a pricing assumption, not a guarantee that every property requires the same work.
Before accepting a quote, ask what is included and what creates additional cost.
Installing an EV Charger on a Detached Garage
Example
House service 100 A. Garage supply 32 A. EV charger approximately 32 A.
The house may have plenty of overall electrical capacity. But the existing cable feeding the garage may not have spare capacity for the charger.
The property can have enough grid capacity while the outbuilding still has insufficient electrical capacity for the charger.
And:
The weakest electrical link may be the supply feeding the garage, not the service feeding the house.
The Important Limit May Be the Garage, the House or Both
Load management can potentially be designed around different electrical limits.
For example a whole-house import limit, a garage submain limit, or both.
The limit that matters may be the whole property, the garage supply or both.
This is why load-management design needs to understand where the charger is electrically connected.
What Is a CT Clamp?
Many chargers use a current transformer — CT — or another energy meter to measure electrical demand.
It may be used for dynamic load balancing, solar surplus charging and import/export monitoring.
The CT needs to measure the correct part of the installation.
The charger can only protect an electrical limit that it can actually measure.
Poor measurement location can lead to poor control decisions.
Smart Meter vs Charger Meter
- Smart Meter
- Used mainly for electricity billing, supplier data and time-of-use tariffs.
- Charger CT or Energy Meter
- May be used for live electrical headroom, load balancing, solar surplus detection and charger control.
These are not necessarily the same thing.
The home’s smart meter measures electricity for billing. A charger may need its own CT or meter to manage electrical headroom in real time.
How Does Solar PV Affect the Installation?
If the homeowner wants to charge the EV from surplus solar, the charger may need to understand solar generation, grid import, grid export and household demand.
That means the metering and CT arrangement should be considered during installation.
If solar charging is part of the plan, the installer should design the energy measurement at the same time as the charger circuit.
How Does a Home Battery Affect the Charger?
A home battery can change the electrical flow seen at the grid connection.
When the battery discharges, grid import can fall. When the battery charges, grid import can rise.
That can affect the electrical headroom available to the EV.
A battery can temporarily create charging headroom by supplying the home, but that headroom disappears when the battery stops discharging.
That is why battery and charger controls need to understand each other.
Installing the charger is easier when the installer understands the solar and battery system as part of the same electrical architecture.
Does a Smart EV Charger Need Wi-Fi?
Many smart chargers need some form of communications connection.
Depending on the charger, this might be Wi-Fi, Ethernet, cellular or another product-specific connection.
Connectivity may be needed for app control, smart tariff integration, firmware updates, monitoring, solar features and commissioning.
A modern EV charger needs both electrical connectivity and data connectivity, even though only one of them carries the charging power.
Check Connectivity Before Installing the Charger
A driveway, side wall or detached garage may have poor Wi-Fi coverage.
Do not wait until after installation to discover this.
Check charger connectivity at the proposed wall location before the wallbox is fixed there.
Possible solutions depend on the charger and property. These may include an alternative charger position, improved Wi-Fi, Ethernet or cellular connectivity.
A smart charger installed in a Wi-Fi dead zone can become a very ordinary charger.
What Happens if the Internet Fails?
Some smart features rely on communications. For example supplier-controlled charging, app scheduling and remote monitoring.
A temporary internet outage should not mean the car becomes impossible to charge.
Smart features may depend on the internet, but the installation should not turn a temporary communications failure into an unusable car.
The exact fallback behaviour should be checked for the charger.
Smart Charger Rules and Electrical Rules Are Different
- Smart-Chargepoint Regulations
- Deal with things such as smart operation, connectivity, scheduling behaviour and consumer controls.
- Electrical Installation Standards
- Deal with circuit design, protection, earthing and safe installation.
A modern home charger is both electrical equipment and a smart controllable appliance.
A charger can meet smart-product rules and still need a properly designed electrical installation around it.
Why Might the Charger Wait Before Starting?
A smart charger may include a randomised delay.
This helps avoid huge numbers of EV chargers all switching on at exactly the same second when a cheap tariff begins.
That means if the cheap period starts at 00:30, the charger might begin a few minutes later.
A charger that waits a few minutes before starting may be operating correctly, not failing to charge.
Tethered or Untethered?
This should be decided after the charger location and cable route are understood.
First establish where the car parks, how far the cable needs to reach and where the wallbox should go.
Then decide whether the lead should be permanently attached or removable.
First decide where the charger needs to be and how the cable reaches the car. Then decide whether you want that cable permanently attached.
Do I Need Single Phase or Three Phase?
Most UK home EV charging is based around single-phase supplies.
Three-phase charging can provide higher AC power where the property has three phase, the charger supports it, the vehicle supports it and the electrical capacity is available.
Buying a three-phase wallbox does not create a three-phase electricity supply.
And:
The charger can only use the phases that actually exist at the property.
Is a 22 kW Home Charger Worth Installing?
Potentially. But four things need to line up.
The property needs a three-phase supply, adequate electrical capacity, a suitable charger and a compatible vehicle.
Imagine a wallbox of 22 kW and a vehicle maximum AC charging of 11 kW. The actual vehicle limit remains 11 kW.
A 22 kW wallbox can be technically impressive and practically pointless if the car only accepts 11 kW AC.
Future-Proofing the Installation
Future-proofing does not always mean fitting the largest possible wallbox.
It may be more useful to prepare ducting, spare conduit, cable route, consumer-unit space, data route, second charger position and load-management architecture.
Preparing for a future charger is not the same as installing a larger charger today.
This can avoid unnecessary work later without oversizing the current system.
Think About the Second EV Now
Even if the property only has one EV today, it may have two later.
The first installation is a good opportunity to consider second charger location, spare duct, electrical route, charger ecosystem and load sharing.
The first installation is the easiest time to make the second installation less disruptive.
And importantly:
Two 7 kW chargers do not necessarily require 14 kW to be available continuously.
They can potentially share available site capacity.
Current EV Charger Grants
Important
Grant schemes change over time.
Current position — August 2026. Some qualifying households can still access EV chargepoint support, depending on property type, tenure, parking arrangement and scheme eligibility.
Not every owner-occupier automatically qualifies.
Do not assume every homeowner can claim an EV chargepoint grant; eligibility depends on the property and scheme.
Always check the current government rules before relying on grant funding.
Does the Installer Need to Be OZEV Approved?
OZEV authorisation is particularly important for qualifying grant-funded installations.
That should not be confused with the wider requirement that every EV charger installation must be electrically competent and compliant.
OZEV installer approval matters for qualifying grant-funded installations; electrical competence and compliance matter for every installation.
Check Grant Eligibility Before Work Begins
If a project depends on grant funding, the application sequence can matter.
Do not assume the charger can be installed first and the grant claimed afterwards.
If the installation relies on grant funding, check the application order before work begins.
What Standards Sit Behind an EV Charger Installation?
A compliant installation may need to take account of standards and regulations covering EV charging equipment, electrical installations, building electrical safety, electricity network connection and smart chargepoint behaviour.
The homeowner does not need to become an expert in every standard.
The standards sit behind the installation so the homeowner does not have to design the electrical protection themselves.
The important thing is that the installer uses the correct requirements for the property and equipment.
What About Building Regulations?
Building Regulation requirements depend on the type of property, the electrical work, and whether other building work is being carried out.
Approved Document S in England is particularly relevant to certain new buildings, major renovations and material changes.
Building Regulation requirements depend on the work being carried out; Part S is particularly relevant to new buildings and certain major renovations in England.
Commissioning the Charger
The installation is not finished simply because the car begins to take power.
The charger should be commissioned.
Depending on the installation, this may include checking:
- charging operation
- protective functions
- load balancing
- CT orientation and measurement
- internet connectivity
- app setup
- smart tariff connection
- solar mode
- user controls
A charger is not fully installed just because it powers the car; the control and protection features need to be commissioned too.
And:
Commissioning proves that the electrical protection and the smart control both work as intended.
What Paperwork Should You Receive?
A completed installation should leave the homeowner with a record of what has been installed.
This may include electrical installation certification, charger model information, commissioning details, warranty information, installer details, app/account setup and relevant DNO information.
A completed charger installation should come with electrical certification, not just an app login and a working cable.
Keep this paperwork with the property’s electrical records.
What Should the Installer Explain at Handover?
The homeowner should understand:
- maximum charger power
- how load balancing works
- why charging power may reduce
- why charging may start after a delay
- how smart scheduling works
- how to use boost or override
- what happens if internet connection fails
- how to isolate the charger safely
- who to contact if there is a fault
A good handover explains not only how to charge the car, but why the charger may sometimes choose not to run at full power.
Know How the Charger Can Be Isolated
The homeowner does not need to understand the internal wiring.
But they should know where the charger circuit can be safely isolated, what to do if the charger develops a fault, and who to contact for support.
The homeowner should know how the charger can be safely isolated without needing to understand the internal wiring.
Worked Example: Straightforward Driveway Installation
Example
A property with a single-phase supply, suitable consumer unit, short cable route, 7 kW wallbox, dynamic load balancing, good Wi-Fi and compatible PEN-fault protection.
The charger is fitted close to the normal parking position. The electrical supply has sufficient capacity and the load-management system prevents the EV from exceeding the configured site limit.
This is a relatively straightforward installation because the cable route is simple, consumer-unit work is limited, electrical capacity is manageable and connectivity already exists.
The wallbox itself is only one part of why the project is straightforward.
Worked Example: Detached Garage
Example
House supply 100 A. Garage submain 32 A. EV charger approximately 32 A.
The property may have plenty of overall grid capacity. But the garage cannot simply support the charger at full power alongside its existing loads.
Possible design questions include garage submain upgrade, local load balancing, charger power limitation or an alternative supply route.
Whole-house capacity and local circuit capacity are different questions.
Worked Example: Heat Pump and EV Charger
Example
Site limit 18 kW. Heat pump 3 kW. Other household demand 8 kW. EV requests 7 kW. Total 18 kW. Everything can operate.
Now household demand rises by 4 kW. Without control, the property would request 22 kW.
With dynamic load balancing, the EV can temporarily reduce. The heat pump and household loads continue operating while the car charges more slowly.
The EV can give electrical headroom back to the house without missing the entire charging session.
Worked Example: Solar, Battery and EV
Example
Solar is generating. The home battery is charging. The EV is also plugged in.
A poorly placed energy meter may not correctly understand solar export, battery charging or real grid import.
That can cause incorrect load-management or solar-charging behaviour.
The charger needs to understand the grid boundary, not simply the charger circuit.
This is why energy measurement should be designed as part of the installation.
Worked Example: Preparing for a Second EV
Example
Today: one EV, one 7 kW charger.
During installation, the homeowner also provides a spare duct, a sensible route to the second parking position and a load-management-ready charger ecosystem.
Several years later, a second EV arrives. The second installation can now use the infrastructure already considered.
Future-proof the infrastructure before you future-proof the charger power.
A Better Way to Plan a Home EV Charger Installation
Where Does the Car Park?
Use the real parking position.
Where Is the Charge Port?
Check cable reach.
Where Should the Wallbox Go?
Consider cable route, accessibility and collision risk.
What Electrical Route Is Available?
House wall? Garage? Underground? Outbuilding?
What Supply Capacity Is Available?
Check the service and existing demand.
What Large Loads Already Exist?
For example heat pump, shower, induction hob, battery, immersion.
Is Dynamic Load Balancing Needed?
Can the EV share the existing connection intelligently?
Is the Consumer Unit Suitable?
Check both physical space and electrical suitability.
What Earthing and PEN Protection Is Required?
This depends on the property and charger.
What Residual-Current Protection Is Required?
Check what the wallbox already contains.
Is the Charger on an Outbuilding Supply?
Assess the submain as well as the house.
Where Should Energy Monitoring Be Installed?
Especially for load balancing, solar and battery.
Is Solar Integration Required?
Design for it now.
Is Home-Battery Integration Required?
Make sure controls understand each other.
Is Connectivity Available?
Check Wi-Fi, Ethernet or cellular options.
Single Phase or Three Phase?
Match the property and vehicle.
Tethered or Untethered?
Choose after the cable route is known.
Is a Second EV Likely?
Prepare infrastructure where sensible.
Are Grants Relevant?
Check before work begins.
What Certification and Commissioning Will Be Provided?
Make this part of the quote.
Questions to Ask an EV Charger Installer
Before choosing an installer, ask:
- What is my service capacity?
- How have you assessed maximum demand?
- Will the charger use dynamic load balancing?
- What site limit will be configured?
- Will you handle the DNO process?
- Is my existing consumer unit suitable?
- What protective devices are required?
- Does the wallbox include PEN-fault protection?
- Does it require a separate earth electrode?
- What residual-current protection is built into the wallbox?
- What additional RCD protection is required?
- What cable route are you proposing?
- Is the garage or outbuilding supply adequate?
- Where will the load-management CT or meter be installed?
- Will it measure solar and battery flows correctly?
- How will the charger connect to the internet?
- What happens if communications are lost?
- Does it support my smart tariff?
- Can it work with solar charging?
- Can it work with a home battery?
- Could it integrate with a future HEMS?
- Could a second charger be added later?
- What does your “standard installation” include?
- What could create additional cost?
- What electrical certification will I receive?
- What commissioning will be completed?
- What warranty and support are included?
The best charger quote explains the installation around the wallbox, not just the wallbox itself.
Common Home EV Charger Installation Questions
Do I need an electrician to install a home EV charger?
A fixed EV charger requires a properly designed electrical installation and should be installed by a suitably competent installer.
Can any house have a 7 kW charger?
Many can, but the supply, existing electrical demand, consumer unit and network connection still need to be assessed.
Does a 7 kW charger use about 32 A?
A typical 7.4 kW single-phase charger operates at around 32 A at nominal UK voltage.
Is a 100 A main fuse automatically enough?
No. Maximum demand and the rest of the installation still need to be assessed.
Do I need DNO permission?
EV charger connections need to follow the appropriate DNO connection process. The installer normally handles this for the homeowner.
Is the DNO my electricity supplier?
No. The supplier sells electricity. The DNO operates the local electricity network.
What is dynamic load balancing?
It adjusts EV charging power according to available electrical capacity at the property.
Can load balancing avoid a supply upgrade?
Sometimes it can avoid or defer an unnecessary upgrade where the issue is simultaneous demand rather than genuine energy-throughput shortage.
Does the charger need its own electrical circuit?
A fixed EV charging point requires a correctly designed charging circuit and suitable protection.
Does an EV charger need an RCD?
EV charging requires appropriate residual-current protection. The exact arrangement depends on the charger and installation.
What is DC residual-current protection?
It is protection against certain DC leakage currents that can occur in EV charging systems.
What is open-PEN protection?
It is a protective method used to reduce risk from certain faults on supply systems where protective earth and neutral functions are combined upstream.
Does an EV charger need an earth rod?
Not automatically. It depends on the property’s earthing arrangement and the protective method used.
Can I use a spare way in my consumer unit?
Possibly, but an empty way alone does not prove the consumer unit or electrical supply is suitable.
Do I need a new consumer unit?
Not necessarily. It depends on the existing board and installation.
Can I install the charger on a detached garage?
Yes, but the garage submain and local electrical capacity need to be assessed.
What if my garage only has a 32 A supply?
A 7 kW charger may use roughly 32 A itself, so the garage supply may become the limiting factor.
Does cable length affect installation cost?
Yes. Longer or more complex routes can increase cable, labour and installation costs.
What does a standard installation include?
It varies by installer. Always ask for the assumptions and exclusions.
Does an EV charger need Wi-Fi?
Many smart functions require data connectivity, although exact requirements depend on the charger.
Can the charger still work if the internet goes down?
Basic charging should not normally depend on perfect internet connectivity, although smart features may be affected.
Can an EV charger work with solar?
Yes, if the charger and metering arrangement support solar-aware charging.
Can it work with a home battery?
Yes, but the controls and metering need to account for the battery’s charging and discharging behaviour.
Where does the CT clamp go?
It needs to be positioned where it can correctly measure the electrical boundary the charger is intended to monitor.
Do I need three phase for 11 kW charging?
Typically, yes. Around 11 kW AC charging normally uses a three-phase supply.
Can I install a 22 kW charger?
Only where the property supply, electrical capacity, wallbox and vehicle all support it.
Can I add another charger later?
Usually, but it is worth planning the cable route and load-management strategy during the first installation.
Do I qualify for an EV charger grant?
Possibly. Eligibility depends on the current scheme, property and applicant circumstances.
Does the installer need to be OZEV approved?
OZEV approval is particularly relevant to qualifying grant-funded installations.
What electrical certificate should I receive?
The installer should provide the appropriate electrical certification for the completed work.
What should be commissioned?
Protection, charging operation, load balancing, metering, connectivity and relevant smart features should be checked.
Why does my charger sometimes charge below full power?
Load balancing, vehicle limits, smart charging or other control systems may reduce the charging rate.
Why does my charger sometimes wait before starting?
Smart scheduling or a randomised start delay may intentionally postpone charging.
Can I run a charging cable across a public pavement?
This should not be treated like a normal driveway installation. Public-footway charging can involve additional permissions, physical safety and electrical requirements.
Design the Installation Around the Home
The best EV charger installation is not necessarily:
- the biggest charger
- the shortest cable run
- the cheapest wallbox
- the charger with the longest feature list
It is the installation that works with:
- the property’s electrical capacity
- the actual parking position
- the cable route
- the consumer unit
- the grid connection
- the charger’s electrical protection
- solar and battery systems
- smart tariffs
- future EVs
The charger rating tells you how much power it could use. Maximum-demand assessment determines how that load fits into the property.
Dynamic load balancing turns spare electrical capacity into EV charging power instead of reserving a fixed block of the connection for the car.
An empty way in the consumer unit is only physical space. It is not confirmation that the charger can simply be connected there.
An EV charger does not automatically require its own earth rod.
The charger can only protect an electrical limit that it can actually measure.
A modern EV charger needs both electrical connectivity and data connectivity.
A completed charger installation should come with electrical certification, not just an app login and a working cable.
Preparing for a future charger is not the same as installing a larger charger today.
And the key principle remains:
A good EV charger installation is the one that safely fits the property’s electrical capacity, puts the charger where the car can actually use it, manages the available power intelligently and leaves the home ready for the way its energy system may develop next.