AFAIK, the gen 3 Tesla charger, despite being wifi capable, is still not controlled from an OLEV-compatible smart service so it does't qualify for the grant (the full list is here =>
Electric Vehicle Homecharge Scheme approved chargepoint model list - GOV.UK).
Having said that, smart charging is IMHO more agro than it's worth most of the time, so unless the OLEV grant is important to you (and I reckon most of the time it only goes to the installer's pocket rather than reducing the fee to the owner), I'd not worry about it. In fact, since all these smart chargers require internet connectivity and a server back-end they introduce complexity that is not really necessary of something that is essentially a switch with some basic safety and load management features. In fact, the need for a server back-end will potentially present yet another need to pay a monthly subscription at some point (since the charge point providers need to pay for it somehow!).
The Tesla charger has a number of advantages over non-Tesla brands:
- It's got the button on the plug to open the charge port
- It's capable of being daisy-chained and will load balance over them
- It's not too expensive
- It looks good
The car will quite happily let you control the charging schedule (you can now do it from the app in fact), so it's not a requirement for the charger to support it. However, if you ever buy another EV, make sure it has its own scheduled charging. We bought a VW ID3 and found its scheduled charging feature to be broken (software problems in the car) and eventually needed to replace our old dumb charge point with a smart one so that we could charge the car overnight at off-peak rates.