A workplace with 364 AC charge points, where cars stay almost seven hours. On a month of the site’s own data, Pleevi’s plan cut the total energy cost by 21% against load balancing, and every car still got the energy it needed.
364 AC charge points at a workplace. In one month: 4,234 sessions and 87.7 MWh, 20.7 kWh per session, with cars parked for 6.8 hours on average. Time enough to charge every car, if the charging is planned.
With plain load balancing, a car charges as soon as it plugs in. Charging piles up when people arrive, whatever the price at that quarter-hour, and that rush sets the monthly peak the grid tariff bills.
Three strategies ran on the same month of data: load balancing, Pleevi planning around day-ahead prices, and Pleevi planning around prices and the monthly peak together. Moving charging to the cheapest quarter-hours saved 5.7%. Planning the peak as well brought the saving to 21%.
21% lower total energy cost, and a grid peak cost 39% lower, with every car charged to what it needed. Most of the saving came from the peak: a cost plain load balancing never looks at.
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