In wallbox planning, you plan wallboxes and electric cars for your customer's project. You record which cars the household drives today and which EV replaces which old car, and you see straight away what the switch saves per year.

The planning feeds directly into the system simulation: charging demand, solar power in the car, fuel costs and savings appear there alongside solar, battery and heat pump.

In the project, open the Survey & Design tab and, in the Mobility section, click the Wallbox Planning tile. The first time you open it, autarc creates a planning automatically.

A project can have several wallbox plannings, e.g. one with one EV and one with two. In the header you switch between plannings, add another with Create new wallbox planning, and rename, duplicate or delete a planning.

The sidebar has three sections:

Use + next to a section to add an item directly, or Add at the top of the sidebar. You choose wallboxes and EVs from My Products or the Product database. Click an item to open its details; use ... to rename or delete it.

Existing cars describe what the household pays for driving today. They are the baseline for every new EV. An existing car belongs to the project, not to a planning: it applies to every wallbox planning and every simulation of the project. If you delete it, it disappears everywhere.

Add it with + next to Existing cars and fill in:

Below, you see what the car costs Per year and Per month, split into fuel, charging at home, charging away and the Total.

Record an existing EV as an existing car with Drive type Electric, not as a planned EV. Its charging then already counts as today's consumption and stays in every scenario. This shows, for example, how much solar power a new PV system puts into the car. With the Solar-optimised charging profile, you show what charging during the day is worth.

If you added it as a planned EV, the simulation would count its consumption as new and show today's situation without the car.

Add a wallbox with + next to Wallboxes and choose a product. The details show the product data, e.g. brand, model, phases, number of charging points and price.

Add the new car with + next to Electric Vehicles and choose it from the Product database. The details show range, battery size, efficiency and price.

Below, Fuel versus charging shows the direct comparison: the fuel cost of the replaced car, the charging cost of the EV and the Saving per year or Extra cost per year. The Energy usage chart shows how the charging is spread over the year, depending on the usage pattern, e.g. Work commuter, Home Office or Weekend driver.

The system simulation compares Current with your scenarios. The cars are split like this:

In the scenario, the household drives all the planned EVs, plus the existing cars that aren't replaced and the remaining share of partly replaced cars. The fuel costs saved and the extra charging appear in the cost comparison and in profitability, and the emissions saved in the environmental impact. If you switch the row off, the simulation leaves mobility out of both sides.

Find out how energy flows between solar, battery, grid and wallbox in Energy flows.

Usually the old car is missing: without an existing car, or without Replaces, there are no fuel costs to drop, and the EV appears only as extra consumption. Also check that the scenario links the right Wallbox planning.

The consumption comes from the cars, not from the wallbox. A wallbox on its own charges nothing, so the Wallbox / EV row shows 0 kWh as long as the planning only contains a wallbox. Add the planned EV under Electric Vehicles, with mileage and home charging percentage. Record an EV the customer already owns as an existing car with Electric.

No. Existing cars belong to the project and appear in every wallbox planning and simulation. Changes apply everywhere.

You add them only in wallbox planning. If the Mobility row says “No existing cars recorded”, add them there. More on the simulation in the System simulation overview.