Charging infrastructure either talks in open standards or it doesn't. That single choice decides whether your estate is a flexible, future-proof system — or a museum of incompatible hardware.
Three open standards do the heavy lifting. OCPP connects the charger to the management backend (and lets you switch networks without replacing hardware). OSCP shares a forward view of available grid capacity. ISO 15118 governs vehicle-to-charger communication, enabling Plug & Charge and bidirectional V2G. Together they cut development cost, enable interoperability, and build a real competitive market instead of walled gardens.
The most consequential decisions in EV charging aren’t about kilowatts — they’re about protocols. An open protocol is a published, vendor-neutral language that any compliant device can speak. Choose open standards and your hardware, software and grid connection can all evolve independently. Choose proprietary ones and you’ve bought a future migration project with every charger.
The Open Charge Point Protocol connects a charge point to the central management software (CPMS) that controls it. Developed by the Open Charge Alliance (OCA), it lets Charge Point Operators switch networks without replacing the EVSE hardware, keep the backend software independent of the hardware vendor, and let drivers roam and charge across networks without juggling separate apps.
The Open Smart Charging Protocol, OCPP’s sibling from the same alliance, links the charge management system to an energy management system, providing a 24-hour outlook of the available capacity within the electricity grid. That forward view is what lets charging be scheduled around real grid constraints rather than blindly drawing power.
ISO 15118 is the open standard for communication between electric vehicles and charging stations. It enables efficient, secure data exchange — underpinning “Plug & Charge” (the car authenticates itself, no app needed) and, crucially, unleashing the potential for bi-directional, vehicle-to-grid (V2G) charging.
Standards and protocols reduce development costs, enable growth through interoperability, and establish a fully functioning market for electric vehicle operations.
Because interoperability is leverage. With open protocols an operator can mix AC and DC stations from different manufacturers, negotiate on software separately from hardware, and add grid-aware smart charging or V2G as the market matures — all without ripping anything out. It’s the difference between an asset that appreciates in capability and one that depreciates into lock-in.
We build hardware-neutral, standards-based charge management so a site can scale and adapt. See EV fleet load management in practice, the building blocks in what EVSE is, and how the standards landscape is consolidating in competing charging standards.
We design charging systems that stay interoperable and future-proof. Let's make sure yours does too.