Any reason to this? Are the batteries poor in the 24-30kw?Yes. There is an issue that Nissan GB will not support their battery guarantee with it, but it certainly works. Given that a lot of cars are now out of their battery guarantee it is not necessarily an issue. You may be able to sign up for the OVO trial still.
It's strange because why make it a thing if the manufacturers aren't going to back it? I was going to get my pod point charging point replaced with OVO smart charger. Maybe I won't nowThat makes sense , say the battery is drained a bit each night to help demand then topped up again your just adding extra charge / discharge cycles to your battery. Might work if you only do say 10 miles a week such as local shops but for most it would have an impact