Rey — Virtual OCPP Charge Point
Drive a virtual charging station in your browser and point it at a real CSMS — boot, authorize, run a full session, and watch every OCPP-J frame live. Or explore against a built-in demo CSMS. No hardware needed.
EV Charging Tools
Free, no-signup calculators and lookups built to make EV charging decisions easier. Each tool also lives embedded in a related article for deeper context.
EV Charging Time Calculator
Estimate how long it takes to charge an EV. Includes a realistic tapering curve for fast charging.
EV vs Gas Cost Calculator
Compare annual fuel costs — electric vs gasoline — given your driving habits and local prices.
Connector Compatibility Checker
Will your EV plug into that charging station? Check connector compatibility across J1772, CCS, CHAdeMO, Type 2, and NACS.
OCPP 2.0.1 Simulator
Watch a charging station and CSMS exchange OCPP-J frames — BootNotification, Authorize, TransactionEvent, smart charging, Plug & Charge — step by step, each message explained.
OCPI 2.2.1 Simulator
Step through the request/response flow between a CPO and eMSP — the credentials handshake, Locations, Sessions, Commands, and CDRs — and see the envelope every reply shares.