Adding and managing your cars

Every plan trevl makes starts from your car: its usable battery, its weight and shape, the plugs it takes and how fast it will accept charge at each state of charge. That is why the first thing we ask for is the car, and why it is worth choosing the exact model.

Adding a car

More than one car

Add each car you drive and pick the right one when you plan. Free accounts can hold three cars, Premium five, and Pro as many as you like. Remove a car from Account with the bin icon on its card; its past journeys go with it.

Adjusting a car

Tap Edit on a car under Account to change:

• Its nickname.
• Typical load: passengers and luggage beyond the driver, about 75 kg a person. Weight costs range on hills and around town, so a car that usually carries the family should say so.
• Arrive with at least: the arrival charge the planner starts from for this car. You can still change it for any one journey.
• Calibration: if the car has one, you can reset it and let trevl learn again, for example after changing tyres or handing the car to another driver.

What we assume about your car

• Battery ageing. Batteries lose capacity over the years, so we assume about 2.5% less usable battery for each year since the model year, never below half. A 2020 car is planned in 2026 as having about 85% of its original battery. It is an average: some batteries fare better, some worse, and calibration corrects for the difference.
• Arriving with enough. Every plan aims to get you to the destination with at least the arrival charge you set on the planner. It starts from the car’s own setting, 15% unless you change it.
• Plugs. We only send you to chargers with a connector your car takes.

Calibration: plans that learn how you drive

Two cars of the same model are not identical, and neither are their drivers. When you tap End on a journey, trevl asks what your car shows and compares it with the charge the plan predicted. If you used noticeably more or less energy than predicted, it offers to save a calibration for that car, and future plans are adjusted to match, including where your charging stops go. Each saved calibration builds on the one before, so the figure settles over a few journeys rather than jumping about.

Within about 5% either way, it tells you the prediction was spot on and there is nothing to save.

Journey history

Each car on the Account page has a Journey History button. It lists your completed journeys with distance, time and how your arrival charge compared with the plan. Open one to see a chart of the planned charge against every reading you gave along the way, with your charging stops marked.