EV charger sharing throughput calculator

Calculate served sessions and mean wait with your own figures.

Your numbers

Use the units shown. Results update as you change valid inputs.

Use served sessions and mean wait to compare changes to your inputs. The method and limits below explain the scope.

Examples

Examples

Try the starting example

Arrival times (minutes)
0,1,2
Occupied durations (minutes)
4,4,2
Charging ports (count)
1
Served sessions (count)
3
Mean wait (minutes)
3
Session schedule (JSON)
[{"item":1,"server":1,"start":0,"end":4,"wait":0,"abandoned":false},{"item":2,"server":1,"start":4,"end":8,"wait":3,"abandoned":false},{"item":3,"server":1,"start":8,"end":10,"wait":6,"abandoned":false}]

Try another scenario

Arrival times (minutes)
0,1,1
Occupied durations (minutes)
3,5,2
Charging ports (count)
2
Served sessions (count)
3
Mean wait (minutes)
0.666667
Session schedule (JSON)
[{"item":1,"server":1,"start":0,"end":3,"wait":0,"abandoned":false},{"item":2,"server":2,"start":1,"end":6,"wait":0,"abandoned":false},{"item":3,"server":1,"start":3,"end":5,"wait":2,"abandoned":false}]
Calculation method

Calculation method

Served sessions (count)

Count FCFS records; all sessions eventually served.

Mean wait (minutes)

Mean max(0, earliest port free minus arrival).

Session schedule (JSON)

Sort arrivals stably; reserve earliest free port, breaking ties by port number.

Symbols and units
a
Arrival times (minutes)
b
Occupied durations (minutes)
c
Charging ports (count)

Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.

Assumptions & limits

Assumptions & limits

  • FCFS identical charging ports; each supplied dwell duration occupies a port. No power sharing model. Supported limits: All numeric inputs and computed intermediates must remain finite. Supported numeric input magnitude is zero or 1e-12 through 1e12 in absolute value; reject values outside this bounded range. All lists/JSON record tables are limited to 100 records unless a stricter bound is stated; reject malformed record arity and wrong member types. Equal nonempty arrival/duration lists; arrivals >= 0, durations > 0; ports 1..20. At most 100 sessions.
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