For a road-trip stop, charge enough to reach the next dependable charger or destination with a sensible reserve. That often means leaving before 100 percent, but 80 percent is not a rule that overrides your route. A remote destination, closed backup site or long next leg can justify charging further.

Why is 80 percent mentioned so often?

Many EVs reduce DC charging power as the battery fills. The last part of a session can therefore add relatively little driving range per minute. The exact taper varies by model; some cars slow earlier and others retain useful power longer.

Separate two questions: how to minimise travel time today, and what charge target the manufacturer recommends for everyday battery care. The best answer need not be the same. Follow your specific car’s guidance, including any battery-chemistry-specific instructions.

Calculate the energy for your next leg

Use the next leg’s distance and realistic consumption, not your most efficient city-driving average. Account for motorway speed, elevation, weather, passengers and luggage. Then add a reserve appropriate to the availability of alternatives.

An illustrative calculation

For a fictional car with 60 kWh usable capacity, travelling 180 km at 20 kWh/100 km requires about 36 kWh, or 60 percent of that capacity. A chosen arrival reserve of 15 percent makes the departure target about 75 percent. If conditions raise consumption to 24 kWh/100 km, the same leg needs 43.2 kWh, or 72 percent, making the target about 87 percent with that reserve.

These numbers show why a fixed 80 percent ceiling can be inappropriate. The reserve is a planning assumption, not a universal recommendation. Real battery estimates and consumption vary, so monitor the car’s arrival forecast and adjust the plan early.

When does charging beyond 80 percent make sense?

It can be sensible before a long gap between dependable sites, before leaving the motorway for a rural destination, or when the next stop has uncertain access. It may also fit a meal break that lasts longer than the vehicle’s fastest charging window. Check time fees before deciding to stay.

If the extra energy is unnecessary and the next stop is dependable, leaving earlier may reduce the total journey time. Include driving detours and setup time when comparing one long stop with two shorter stops; a second session is not free in time.

What changes at the destination?

Arrival at a hotel with a confirmed, usable charger is different from arrival at a holiday apartment with none. Plan enough energy for the next morning and a backup if promised charging is occupied. Our hotel-charging checklist explains what “charging available” should mean before you rely on it.

Make the target part of the route, not a habit

Before each stop, review distance to the next option, expected arrival battery level, opening hours and alternatives. StromNow uses vehicle data and battery level to plan stops; keep the inputs current and compare them with your vehicle’s display. Read why fast charging slows if actual performance differs substantially from the plan. A useful target is one you can explain from the next leg, rather than a round number chosen automatically.

Plan the next leg with StromNow

Use StromNow to plan your route, find suitable charging stops and check prices. Build your next journey around the energy you need and the breaks that suit you. Explore StromNow and download the app.

Editorial review: 5 September 2026. Check current station conditions before charging.