You compare home chargers, pick one, and discover the unit is a minority of what you will spend. The electrician quotes several times its price, and the reason has nothing to do with the charger — it is the distance from your electrical panel to where the car parks, and whether that panel has capacity to spare.
Understanding those two variables before you shop tells you far more about what this will cost than any product comparison.
What changed in 2026
- Load management became mainstream. Devices that monitor total household draw and throttle charging accordingly moved from niche to commonly specified, and they routinely avoid a panel upgrade.
- Bidirectional charging shipped more widely. Vehicles able to power a home during an outage reached more models, though the required equipment remains a significant additional cost.
- Time-of-use tariffs spread. EV-specific rates with large off-peak discounts became widely available, making scheduling the biggest running-cost decision.
- Connector standardisation settled. Consolidation around common connectors reduced the risk of buying equipment that becomes awkward.
What drives the cost
| Factor |
Effect on cost |
Notes |
| Distance from panel to charger |
Large |
The dominant variable in most quotes |
| Spare panel capacity |
Very large if absent |
An upgrade can exceed everything else combined |
| Panel age and condition |
Moderate to large |
Old panels may need replacing regardless |
| Wall type and routing |
Moderate |
Through finished walls costs more than a garage run |
| Permits and inspection |
Small to moderate |
Varies by jurisdiction, and required |
| The charger itself |
Small |
Often the smallest line item |
The second row is the one that turns a routine job into an expensive one. Your panel has a total capacity, and a charger is a substantial continuous load. If the existing load plus the charger exceeds what the panel supports, you are looking at a service upgrade — which means new equipment, possibly utility involvement, and a very different budget.
Which is exactly the problem load management solves. A load-managing charger or a monitoring device watches total household draw and reduces charging when the house is using a lot elsewhere. The peak never exceeds capacity, so the panel does not need upgrading. Given that your car is charging overnight when almost nothing else is running, the throttling rarely costs you any real charging time. When an electrician's first answer is "you need a panel upgrade," this is the question worth asking before accepting it.
You need less speed than you think
The instinct is to buy the fastest charger you can install. It is usually wasted money.
Work from your actual driving. Most people drive well under the range added by a modest circuit overnight. If you drive 40 miles a day, almost any level 2 setup replaces that several times over during the hours the car sits parked.
The constraint on home charging is hours available, not kilowatts. A car plugged in from 7pm to 7am has twelve hours. Filling a large battery from near-empty in that window does not require the fastest circuit available; it requires a reasonable one.
A lower-amperage circuit is also cheaper to install, may avoid an upgrade entirely, and is gentler on a panel with limited headroom. Faster charging is worth paying for if you genuinely have short windows and high daily mileage, or run multiple vehicles — otherwise size it to your driving.
Running cost and scheduling
Once installed, the largest lever is when you charge.
Where time-of-use rates exist, the gap between peak and off-peak is often substantial. Charging on a schedule that lands entirely in the cheap window can cut running cost dramatically for zero effort — set it once in the car or the charger and forget it.
Two implementation notes. Schedule in one place, not both: a car and a charger with conflicting schedules produce a car that did not charge. And where your utility offers an EV-specific tariff, check whether it requires separate metering, since that changes the install.
If you have solar, the calculation shifts again. Daytime charging converts exported power into self-consumed power, which is worth considerably more — see solar payback. That argues for charging midday where your schedule allows, which is the opposite of the off-peak advice and can be the better answer.
Common mistakes
- Buying the charger before getting an electrical quote. The install determines what is sensible.
- Accepting a panel upgrade without asking about load management. Frequently avoidable and far cheaper.
- Over-specifying speed. You are asleep; the hours are the constraint.
- Skipping permits. Affects insurance and resale, and inspection exists for good reason on a load like this.
- Mounting where the cable does not comfortably reach. Check the connector position on your specific car.
- Double-scheduling. Car and charger schedules that conflict mean no charge.
- Ignoring outdoor requirements. An outdoor install needs appropriate weather rating and, ideally, some shelter.
FAQ
Can I just use a standard outlet?
For low daily mileage, sometimes — it adds a few miles per hour and can be adequate for short commutes. It is slow enough that any deviation from routine leaves you short, and a dedicated circuit is strongly preferable for a continuous load of this duration.
Do I need a smart charger?
Not strictly. Scheduling can happen in the car, and that is enough for most people. Smart chargers add load management, consumption monitoring, and utility programme participation — the load management is often the part that justifies it.
What about renting?
Harder, and worth asking about rather than assuming. Some landlords will permit an install at your cost, and portable options on an existing suitable outlet are a fallback. Check what is possible before buying a car that depends on home charging.
Is bidirectional charging worth it?
As backup power it can be compelling; the equipment cost is significant and support varies by vehicle. Evaluate it as a home backup purchase rather than an EV feature, because that is the value it delivers.
Where to go next
For choosing the unit once you know what your install supports, read the best home EV chargers. For the solar interaction that may change your charging schedule entirely, solar payback, and for reducing household load generally, home energy audit.