Software-Defined Infrastructure

site controller · chargers · storage

A depot's grid connection is fixed; its software decides how far it stretches. Site controllers let more vehicles charge on the same service.

One site controller coordinating many assets: chargers, battery storage, solar and the grid meter, under rules and schedules. ONE SITE CONTROLLER, MANY ASSETS Site controller rules, schedules Chargers Battery storage Solar Grid meter
Coordinates
Chargers, BESS, PV
Key limit
Grid service
Standard
OCPP
Payoff
More vehicles per kW
Hub
Systems

Finding

Software-defined infrastructure stretches a fixed grid connection by coordinating chargers, storage and solar from one site controller

A depot or charging hub has a fixed utility service - often the hardest thing to expand. Software-defined infrastructure uses a site controller to share that capacity: it allocates power across chargers by vehicle priority and departure time, charges a battery when the site is quiet and discharges it when many vehicles plug in, and uses solar when available. The result is more vehicles charged on the same grid connection and lower demand charges.

Open protocols make it work across vendors: OCPP for chargers, OpenADR and IEEE 2030.5 for utility signals, and Modbus or SunSpec for inverters and storage. The same controller can participate in utility demand-response programs. See Fleet Energy Depots and Autonomous Fleet Depots.

Functions

Site controller functions

SDI functions
FunctionWhat it doesProtocol
Load managementShare power across chargersOCPP smart charging
Storage dispatchCharge and discharge site batteryModbus, SunSpec
Utility signalsRespond to prices and eventsOpenADR, IEEE 2030.5
SchedulingMatch charging to departuresFleet management APIs
MonitoringFaults, uptime, energy useTelemetry

Sources

Sources and scope

Scope
Software-Defined Infrastructure
Sources
OCPP; OpenADR; IEEE 2030.5; ElectronsX
Updated
October 2026