Guide
Charging two electric cars at home
Two electric cars can share one home charger or use two chargepoints, depending on when they are parked and how much energy each needs. Two 7 kW chargers do not mean every home can draw 14 kW at once: an installer must assess the existing supply, other appliances and any load management.
In plain English
Can two cars share one charger?
Yes, if you can take turns and both cars can charge during their parking windows. One charger can work well if the cars do not both need a large top-up on the same night, or one is away while the other charges.
Two chargepoints may be more convenient if both cars regularly arrive low and leave early. That does not mean both automatically charge at full power simultaneously. Some systems share an agreed charging allowance; ask the installer how the exact equipment works.
Start with your routine: how much energy each car needs before its next trip, when each is parked, and how often both need charging overnight. Most homes do not need to refill two complete batteries from empty every night.
In plain English
Two 7 kW chargers do not automatically mean 14 kW
Two units rated up to 7 or 7.4 kW could request roughly 14 to 14.8 kW together. Whether that demand is available depends on the assessed home supply, other electrical loads, each car's AC limit and any charger settings.
A 60 A, 80 A or 100 A main fuse rating on its own cannot tell you whether two chargers can run at full power. The home's wiring, phases and other demand matter too. Do not calculate a safe allowance from the fuse label or change it yourself.
UK Power Networks says an installer should assess the effect of multiple low-carbon technologies and may need to notify it or request a supply upgrade. That guidance is for its service area; other DNOs have their own process.
In plain English
When load balancing can help
Dynamic load balancing monitors household demand and can turn car charging down when the home needs more power, then increase it when demand falls. A compatible system may coordinate multiple chargers, but how many units and which household loads it monitors depends on the installation.
Tell the installer about an electric shower, heat pump, induction hob, electric heating, solar panels, home battery and both EVs. A shower and cooking may overlap with evening charging; heating may run overnight; two cars may request power together. These are reasons to assess combined demand, not to assume a standard threshold.
A timer chooses when charging can happen; a fixed limit caps charging; dynamic load balancing responds to demand. Ask what the proposed system monitors and what happens if its sensor or communications fail. Read the load-balancing guide.
In plain English
Fit two cars into an overnight tariff
Estimate how much energy both cars need and check whether they can take turns within the cheaper window. The tariff window does not guarantee two charging slots: the car, charger and supplier service may each have schedules. Check which system controls each session and leave time before departure.
Some installations share power while meeting a target; others need a longer window. Electricity outside the eligible hours may cost more, and supplier rules vary. Do not apply one cheap rate to every kWh automatically. See the home charging cost guide and estimate a session cost.
Your next step
What to ask before getting two chargers
- How much energy does each car normally need before its next trip?
- Can the cars take turns, or must both charge at once?
- What combined household demand and appliances will be assessed?
- Can the chargers share available supply, and how is power divided?
- Does the work need DNO notification or approval?
- Does the quote include sensors, setup and any supply work?
A competent installer should assess the property and explain any network steps. Use the installation overview and 7 kW versus 22 kW before comparing quotes.
Further reading
Sources
- Last reviewed
- Multiple installations at the same property — UK Power Networks. Combined electricity demand, installer assessment and notification or supply work in this operator's area; checked 6 October 2026.
- Electric vehicles: cost, time and what's involved — UK Power Networks. Supply assessment, installer notification and site-specific network work. UK Power Networks' process applies in its own service area; other operators have their own arrangements.
- The critical role of Grid CT sensors in myenergi installations — myenergi. Manufacturer-specific explanation of supply monitoring, Grid Limit settings and charger load curtailment; not a universal specification for other brands.
- Single-phase and three-phase electricity supplies — UK Power Networks. The distinction between supply types and why an electrician should assess the property's demand.
- Regulations: electric vehicle smart charge points — GOV.UK / Office for Product Safety and Standards. Great Britain rules for covered private chargepoints, including default off-peak settings, randomised delay and continued charging without a communications connection.