What are your objectives for acquiring a 'smart' charging station? What advantage does that provide you compared to your current situation? Is it truly necessary to substitute the EVSE controller?
To capitalise on variable rate tariffs, you must have a method for monitoring the fluctuating tariffs. If they are uncomplicated peak/off-peak periods during conventional hours, then virtually any charging station can accommodate that, or your vehicle can be effortlessly programd to utilise those timings.
To capitalise on local solar generation for self-consumption, it is essential for your chargepoint to ascertain the energy availability at your property, enabling you to charge your vehicle solely with solar power when time is not a constraint.
To capitalise on highly variable-rate tariffs such as Octopus Agile, it is essential to have a system capable of retrieving your half-hourly rates and modifying your car's charging schedule based on your needs.
To benefit from 'Intelligent' tariffs, such as Octopus Intelligent Go, you must relinquish complete control of your charging to a third party.
I substituted my outdated Rolec Wallpod with a system based on an OpenEVSE controller, successfully implementing options 1 and 2 mentioned above, integrated through Home Assistant. It is indeed a vessel of Theseus/ Trigger's broom.
The majority of 'smart' charging stations are connected to remote control systems rather than being governed by local control mechanisms. For instance, pod point depends exclusively on its own servers to manage your chargepoint. OpenEVSE is unique. Certain 'intelligent' charging stations have proven to be ineffectual relics when the provider ceased operations, exemplified by JuiceBox's withdrawal from the US market, which resulted in the closure of their central management systems. The case of Andersen also occurred in the UK.
If the 'smart' control is unnecessary for you and your focus is solely on enhancing reliability and adhering to the latest electrical wiring standards, you may continue to upgrade the electrical components of your Rolec, as numerous forum members have done, to incorporate PEN loss protection (which is not a concern for me since I possess an earth rod), or an RCD that complies with current regulations concerning DC faults, unlike those applicable at the time of your initial installation.