Depot charging

Boxtom
public charging with smart battery management

Battery
Max charging capacity
250 kW
Capacity
0.528 MWh
Chargers
Max charging capacity
3 x 200 kW
Connection
Physical
500 kVA
Contracted supply
84 kW
Contracted feed-in
200kW

Block power contract (between 00:00 and 06:00): the contracted supply is 250 kW

Operator
Operator
Dutch Solar Energy
Hardware
Socomec battery
Hardware
Alpitronics
Energy supplier
Powerhive
Gateway
Zympler

The situation

A constrained grid connection, public charging stations, and three competing battery targets: how do you manage a system you can't predict?

EV CHARGE REVENUE
+60%
ERE
+30%
GRID VIOLATIONS
0

Key challenges

Constrained grid connection with unpredictable peak load

The charging stations are publicly available, making peak demand unpredictable and allowing the grid connection to be exceeded at any time.

Three competing battery goals without fixed priority

The battery must simultaneously optimize solar energy, trade on energy prices, and absorb charging peaks. These goals constantly conflict.

Unknown charging demand makes control impossible without prediction

Because it's unknown when the next charging session will occur, it's difficult to determine when the battery should be full and when it can trade.

Arne Kiel
Dutch Solar Energy

"Zympler now provides intelligent control: maximal utilization of the grid connection at the lowest possible energy costs."

Boxtom and Zympler

Battery performs on three fronts simultaneously

Solar optimization, day-ahead and imbalance market trading, and peak power for charging sessions, all controlled by a single system on a single, limited grid connection.

Fair charging for different users

E-trucks and fast-charging commuters share the same connection without either being short-changed, even during peak times.

Maximize returns where others only safeguard

While competitors solely focus on peak shaving, Zympler also generates trading revenue from the location, despite the uncertainties of an unpredictable public charging profile.

Why are Zympler and Boxtom a match?

Boxtom managed a location too complex for standard solutions: public DC charging stations, a tight grid connection, two user profiles, and three competing battery objectives.

Most EMS systems focus on a single goal and neglect the rest. Zympler optimizes the entire system, adjusts in real-time, and also handles nomination and trading. This makes Zympler not just a technical choice, but a commercial one.

Other relevant cases

Boxtom

Public charging with smart battery control

TU/e campus

The self-optimizing campus

50five and ALLSAFE

Silent batteries at work

R. Nagel Transport

Smart charging at the grid edge

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