eMobility is more than charging a vehicle.
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One charging session
One session. Three connected flows.
A card tap starts more than charging. Follow the data, energy and money behind the same session.
How does the session get authorized?
Messages move between the charger and the systems that decide whether it can start.
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The charger reads the card.
The charger reads a digital identifier. It does not know who the driver is, and the session has not started yet.
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The request reaches the backend.
The charger passes the card information to its operator’s system to ask whether charging may begin.
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The decision route is determined.
The backend checks whether it can decide itself or needs a response from another provider.
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An authorization request is sent.
If another provider is responsible for the card, the request is forwarded through the connected systems.
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Access is checked.
The responsible system checks whether the card identifier is valid, active and permitted at this location.
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Pricing rules are referenced.
The applicable tariff is considered. How the price is shown depends on the charging and payment model.
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A decision returns to the charger.
The authorization is approved or declined. The result travels back through the systems involved.
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The charging session can start.
With approval in place, a session context links the charger, card and timing. Energy can flow when the vehicle is ready.
How does energy reach the battery?
The physical flow has its own limits, from the grid connection to the vehicle.
The grid sets the limit.
Power reaches the site through a connection with finite capacity. That limit shapes what its chargers can deliver.
AC or DC reaches the vehicle.
With AC charging, the car converts power for its battery. With DC charging, conversion happens in the station.
The battery sets the pace.
The vehicle negotiates charging power and reduces it as the battery fills or conditions change.
Where does the money go?
A simplified roaming example shows how one payment is shared across the session.
The driver pays a tariff.
The mobility service provider sets the driver’s price. The same charger can cost different amounts through different providers.
The eMSP pays wholesale.
It pays the charging operator a roaming price. The difference from the driver’s price contributes to its margin.
The CPO receives revenue.
The charge point operator uses it to cover energy, site costs, hardware and service.
The site and energy are paid for.
The site host and energy supplier receive their shares. What remains contributes to the operator’s margin.
One charging session. More happening than the driver can see.