One evening on the grid, fully understood
Eighteen cars in the street are full. The transformer never exceeded its rating overnight.
Most of the charging happened between 11 PM and 5 AM.
The questionCan you explain how the street managed it?
The evening in eight moments
Forty houses, one transformer: electricity from five grid levels down to the wallbox.
Stop 01Different suppliers, one grid operator: the roles behind each kWh.
Stop 02The evening peak, and charging that would have pushed it over the limit.
Stop 03Twelve hours plugged in, one hour of charging: flexibility.
Stop 04Prices by the quarter hour, a , the cheapest slots chosen.
Stop 05A grid signal for forty minutes, a guaranteed minimum for every wallbox.
Stop 06Half the street on green tariffs, a leaf at the corner charger.
Stop 07A sunny noon: the car charges from the roof.
Stop 08
Eight moments, one street. Charging fits the grid when it uses the one thing cars have plenty of: time.
Where to go from here
Bidirectional charging takes the next step, cars that give energy back, Battery storage the stationary batteries beside chargers, and Load management the control on site. See all learning paths.
Check your understanding
4 questions. Answer all of them to complete this stop. Each answer explains itself.
What kept the transformer below its rating overnight?
The same energy flowed when the street was quiet, at lower power over more hours.
Which signal did the cars follow at 7:20 PM?
With a dynamic contract, the cars picked the cheapest quarter hours before departure.
What did the wallboxes keep during the grid signal at 7:30 PM?
In the German rules, each directly controlled device keeps at least 4.2 kW.
What does the leaf at the corner charger tell a driver?
AFIR's dynamic data includes whether the electricity supplied is 100% renewable; it refers to the supply contract.
- Dynamic electricity price A contract whose price follows the wholesale market, for example quarter hour by quarter hour; available to customers with a smart meter. Stop 05 Glossary