The site
Solar on the roof, cars in the car park
155 AC charge points at a workplace with solar on site. In one month: 3,095 sessions and 103.7 MWh, 33.5 kWh per session, with cars parked for 7.2 hours on average.
Solar into the cars, 43% off the energy bill
A workplace with 155 AC charge points and its own solar. Load balancing exported the midday surplus and charged cars from the grid at other times. Planned around the sun, the prices and the peak, the same month cost 43% less.
Charge points155 AC
Sessions in the month3,095
Energy charged103.7 MWh
Average stay7.2 hours
−43%total energy cost
−58%grid peak cost
32 MWhless sent to the grid, and less drawn from it
The challenge
Sun at noon, charging at any time
Solar peaks at midday, while load balancing simply charges cars when they arrive. So the surplus went back to the grid at low prices, and the cars drew power from the grid at other times.
What Pleevi does
Every session planned around the sun
Pleevi plans every session around the solar forecast, day-ahead prices and the monthly peak. Cars charge when the sun delivers and prices are low, and the peak stays down, without drivers noticing a thing.
The result
More of the site’s own solar in the cars
On the same month: energy cost 31% lower, grid peak cost 58% lower, total cost 43% lower. Injection and offtake each fell by 32 MWh, because more of the site’s own solar ended up in the cars. Every car still got the energy it needed.
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