As I understand it, you can't tell the charger when to charge. You have to tell the car which then requests the charge from the charger. Previously, you plug in and set your charger to charge during the cheap hours (or it would do this automatically). However now you have to set it from the car (or the app). It's probably not that much of an issue, but seems a bit clunky.
My concern is that I think it's easier for you to charge outside the cheap rates as the charger won't automatically cut off anymore like it used to.
octopus.energy