You purchase a company license. This entitles you to use and sell the software on your hardware as part of your product for an unlimited period of time, regionally and quantitatively, but not exclusively.
You receive the source code. The programming language used is C/ C++ - the platform is Embedded Linux and x86 Linux.
A valid maintenance contract entitles you to receive updates for bug fixes, optimizations and more. If new versions of the underlying standards are adopted by the OCPP Protocol or ISO 15118/IEC 15118 and you have a valid maintenance contract, you can purchase an upgrade.