Hi Terry – just noticed your post. – I have been using OHME since august – just plug it in and use the app on my phone – I have not used start at a time or finish at a time as OVO is the same price day and night – I usually wait until the miles left are around 200 then charge it – the app shows the miles put on – so when it gets to just over 100 ie 300 + in battery I stop.
It is particularly useful on frosty mornings – plug it in and defrost car – windscreen back and front and mirrors in about 10 mins – I haven’t used it on hot days as the sunroof works just fine – if you are parked in direct sunshine – I’m not – you may want to use a screen for front and steering wheel – I do this when I am parked on hot days away from home – hope this helps – enjoy the car ?