Demonstration project · Logistics
Distribution centre, Utrecht region: 12 van chargers on a 400 kW connection
A fictional site used to show our method from meter data to system. The figures come from the same model as the calculator and are not measured results.
- Contracted capacity
- 400kW
- Modelled peak
- ~470kW
- Proposed system
- 2 × Kern 125
- Power / energy
- 125kW / 250kWh
The situation
The operator wants to replace 12 diesel vans with electric ones. The grid operator has placed the request for a heavier connection on a waiting list. Vans return between 06:00 and 09:00 after night routes and need to be ready again by early afternoon. The roof carries 250 kWp of solar.
What the data showed
- Current peaks of about 470 kW for roughly two hours around late morning, when sorting lines and cooling overlap.
- 80 kW of charging in the first operating hours fills most of the remaining headroom; together with the late-morning peak the site would exceed its limit every working day.
- From 20:00 to 06:00 demand is far below 400 kW: enough headroom to recharge.
- Grid demand (modelled)
- With storage
- Contracted capacity
- Solar output
Sizing choices
Power first
The highest modelled exceedance sets the minimum power. With a 5% margin under the contracted capacity and 10% sizing margin, two cabinets (125 kW) cover it.
Then energy
The orange area is the energy to deliver per day. After depth of discharge and margin, two cabinets (250 kWh) cover the modelled day.
Recharge check
Overnight headroom is many times larger than the energy needed, so the battery is full before the vans return.
On site
Cabinets stand outdoors on a concrete pad, away from escape routes and loading traffic, with a collision barrier. The EMS reads the main meter and passes a dynamic limit to the charge points. Location, distances and fire-safety measures are agreed with the client, the insurer and the local fire service as part of the project.
What stays open
The business case depends on costs, financing, tariffs and the waiting time for a heavier connection – factors outside this model. That is why we present it separately, with the client's own figures.