Read the EV charging demand
Understand how a customer's electric vehicle shows up as an electricity-demand stream in the simulation, and why the wallbox-plus-EV pairing and the solar-surplus charging assumption drive the number.
When a variant includes both a wallbox and an electric vehicle, the simulation adds the car's charging as a demand stream on top of household consumption. This page explains how that demand is modelled and what shifts it. To add the wallbox and pick the vehicle, see Plan a wallbox. This page is about reading the result, not setting it up.
How the EV demand is modelled
- The car's annual electricity need is derived from the vehicle you select (its battery capacity and consumption figures) and the annual mileage you enter, then added to the energy balance.
- The charging is shaped by the wallbox power rating and the charging window, including charging from solar surplus where it is available.
Things to know
- You need both a wallbox and a vehicle for EV demand to appear. A wallbox on its own is a hardware line item with no effect on the simulation; there is no charging load without a car.
- The simulation assumes solar-surplus charging when solar and a wallbox are planned together. If the customer actually charges from the grid at night, the real self-consumption will be lower than the forecast shows. Worth saying out loud in the consultation.
- The car is modelled as a load only. Feeding the car's battery back into the house (vehicle-to-home or vehicle-to-grid) is not credited in the forecast.
- Fleet modelling is a commercial capability. Modelling several vehicles with per-vehicle usage patterns is available on commercial offers. On a residential offer you model a single vehicle's charging.
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