Planning a Long EV Journey in the UK

The first long journey in an electric car is the one that decides how you feel about owning one. Done badly it is three hours of watching a percentage drop and doing arithmetic at 70mph. Done properly it is a normal drive with slightly longer coffee stops.

The difference is almost entirely planning, and the planning takes about ten minutes.

Start from your real range, not the brochure

Every EV has an official WLTP range figure, and on a motorway in British weather you will not see it. WLTP testing includes a lot of low-speed driving, and electric cars are least efficient at exactly the sustained high speeds a long trip consists of.

A sensible working assumption for motorway cruising is around 70 to 80% of the WLTP figure in mild weather, and as little as 60% in genuine cold. A car rated at 300 miles is a 200 to 240 mile motorway car in spring and might be a 180 mile one in February.

This is not a defect. It is the same physics that makes a petrol car's economy worse at 80mph than at 50. It just matters more because refuelling takes longer.

Plan legs, not the whole trip

The instinct is to plan the journey. The better approach is to plan the next charging stop and keep a rough idea of the one after.

Work in legs of roughly 120 to 150 miles between rapid stops. That may sound conservative for a car with a 250-mile range, and it is — deliberately. It keeps you in the fast part of the charging curve, where you arrive at around 15 to 20% and charge to 80%, rather than the slow part. Two 20-minute stops beat one 45-minute stop, and you arrive less tired.

It also means that when a charger is out of service, you have the range to reach the next one instead of a problem.

The 20% rule

The single most useful habit: plan to arrive at every charging stop with at least 20% remaining.

That buffer is not about the battery. It is about the charger being broken, occupied, ICEd by a diesel estate, or behind a barrier in a car park that closed at six. Twenty percent of a typical battery is 40 to 50 miles — enough to reach an alternative without the journey becoming an emergency.

Drivers who ignore this rule are the ones with EV horror stories. Drivers who follow it mostly find that long trips are boring, which is the goal.

Choosing where to stop

Three criteria, roughly in this order.

Number of bays. A site with six rapid chargers is dramatically more reliable than a site with one, and not by a factor of six — by much more, because the failure mode that strands you is not "all chargers broken" but "the one charger is broken or busy". Favour hubs.

Power matched to your car. If your car peaks at 50kW, a 350kW hub buys you nothing and a well-placed 50kW unit is as good as anything. If your car can take 150kW or more, an ultra-rapid site genuinely halves your stop. Know your number and plan to it.

What is actually there. Twenty-five minutes is a coffee and a sandwich if you stop somewhere with a coffee and a sandwich, and twenty-five minutes of standing in the rain if you do not. Motorway services are expensive but they have facilities; retail park hubs are often cheaper and quieter with a supermarket next door.

A practical move on unfamiliar routes: identify your intended stop and a backup 20 to 30 miles further on, before you set off. It takes a minute and removes the entire category of problem where you arrive to a broken unit with no plan.

Use the car's own navigation when it has it

Most modern EVs will precondition the battery — warm it on the move — when a rapid charger is set as the navigation destination. This can be the difference between charging at full rate and charging at half rate in winter, which is ten or fifteen minutes per stop.

The car generally will not do this if you navigate with your phone. On a cold-weather trip, route to the charger in the car's own system even if you prefer your phone's maps in every other respect. Then use PlugMap or the operator's app for what the car's built-in database is usually worse at: checking what is actually at the site and who runs it.

On the day

Set off with a full battery. If you charge at home, schedule it to finish shortly before departure, so the pack is warm rather than having sat at 100% cooling overnight.

Take a bank card and, ideally, the apps for the networks on your route. Contactless is now required on new 8kW+ units and existing 50kW+ rapids, but a dead phone at an older unit is still a bad afternoon.

Carry your Type 2 cable even on a rapid-only itinerary. If everything goes wrong, a 7kW post at a hotel will still get you home tomorrow.

Drive a little slower than you would in a petrol car. The efficiency penalty at high speed is steep in an EV, and dropping from 75 to 65mph can extend a leg meaningfully. On a long trip that is often one fewer stop.

When the charger is broken

It happens. It happens less than it used to — rapid networks are now held to a 99% reliability standard, and every unit must carry a free 24/7 helpline number.

Work through it in order. Try a different bay on the same site. Try a different connector on the same unit. Ring the helpline on the sticker, because remote resets fix a surprising proportion of faults in a couple of minutes. If none of that works, you still have 20% in the battery, and your backup site is 25 miles up the road, because you picked one before you left.

That is the whole method. A realistic range figure, legs of 120 to 150 miles, arrive at 20%, charge to 80%, favour multi-bay sites, and always know where the next one is.