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The Glass Pool · EMOBILITY

Charge point & OCPP

EV charging — charge points, load management, service connection. Part of the glass family — like our glass BESS, biogas plant and CHP.

Charge point & OCPP
Service connection → Load management → Charge point → Vehicle
Glass-box in 4 steps

Understand → See it live → What the AI does → Your benefit

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Understand
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What the AI does
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Your benefit

What is Charge point & OCPP?

From the building’s point of view a charge point is a very large but very flexible load. Large because it draws double-digit kilowatts; flexible because the vehicle usually stands there far longer than the charging itself takes.

OCPP is the open protocol between charge point and backend. It exposes status, power and energy per point — across vendors and without interfering with the charging control.

What is measured here

  • Status per charge point (free, occupied, charging)
  • Instantaneous power and energy per charging session
  • Dwell time versus charging time — the usable shifting window
  • Simultaneity across several points

How we connect it — read-only

  • OCPP (1.6J or 2.0.1) against the existing backend — read only.
  • Modbus meter on the charging feeder for the actual aggregate load.
  • Vehicle departure time where it is held in the booking or charging system.

Schematic (native, live)

EV charging — charge points, load management, service connection.

Service connectionCharge pointVehicle

Overview: The Glass Pool → · Markets: pool markets →

Live —

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loading

What the AI does

  • Uses the gap between dwell time and charging time as flexibility.
  • Prioritises by departure time, not by order of plugging in.
  • Prevents several points at once from running into the building peak.
  • Places charging in PV and low-price hours as long as the departure time holds.

Method proven on a live European reference aquatic center; presented anonymously.

Flexible charging window

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Estimate from metered / design values. Zero-grid-import windows are real (metered).

Standards & norms

What the rules require — Charge point & OCPP

Grounded in DIN 19643, VDI 2089, DGfdB and the German Buildings Energy Act. Same knowledge base as the European reference site; presented anonymously.

What is OCPP and why does it matter?

OCPP is the open protocol between charge points and their backend. It makes charging infrastructure readable across vendors — the precondition for including charging in a load picture at all.

Basis: plant engineering

Does the guest have to wait for their vehicle?

No, as long as the departure time is known or can be estimated. Shifting happens only within the window between arrival and departure — the charge is ready in time.

Basis: plant engineering

How much flexibility is there really?

It follows from dwell time minus required charging time and therefore differs from property to property. That gap is measured rather than assumed.

Basis: plant engineering

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