Charging priorities
Article contents
Priorities determine how available power is shared when there is not enough for everyone. They can, for example, give operating vehicles precedence over optional visitor charging. The default setting is normal priority.
Three priority levels
| Priority | Behaviour |
|---|---|
| Low | Charging is reduced earlier. A functional minimum may remain if capacity allows. |
| Normal | Can receive more power while retaining the low-priority minimum if capacity remains. |
| High | Can also pause lower-priority charging. |
If all basic charging allocations in ECO with minimum fit within capacity, they remain protected. Higher priority alone does not override this rule or technical limits.
How a restriction affects vehicles
AC vehicles receive zero or whole amperes from 6 A. If there is not enough capacity for all minima, some vehicles must wait. Within the same priority, rotation favours less energy delivered since charging began, then longer waiting, earlier start and a stable order. Outside a rotation point, continuity for vehicles already charging is favoured.
The order is reconsidered at each full and half hour in local time, such as 10:00 and 10:30. This is not a 30-minute timer from connection or a mandatory swap of every vehicle. Priorities, energy already delivered, waiting vehicles and distribution limits also matter.
Choosing priorities
An operating vehicle can have high priority, an employee vehicle normal priority and optional visitor charging low priority. Priority can belong to a connector or a recognised vehicle. Where the connector accepts vehicle priority, the higher of the two applies. Otherwise the connector decides. A vehicle visiting a public car park therefore need not gain an advantage from its own setting.
Model example: six vehicles and 35 A
Six single-phase vehicles on the same phase share a 35 A budget. Six minima of 6 A would require 36 A. One possible allocation is five vehicles at 7 A with one paused. At the same priority, the next reassessment accounts for who has received less energy and who is waiting.
Fairness also considers power and energy rather than equal amperes. A single-phase vehicle at 18 A and a three-phase vehicle at 6 A have approximately the same 4.14 kW power at 230 V, but load the phases differently.
COMFORT and priority are different settings
COMFORT for one charging session bypasses time, tariff and solar conditions. It does not raise priority or override a technical limit, an explicit user stop or a zero BMS budget. See ECO and COMFORT.
Priority does not guarantee charging by departure. This article describes cloud rules; labels and controls in the original local SmartSystem depend on its version and manual.
Where to go next
Cloud EMS technical guide · Product guide (PDF, Slovak) · Technical guide (PDF, Slovak).