I have managed to look deeper into the Octopus V2G up coming tariff, apparently it works alongside the customers existing energy tariff the terms and conditions are quite restrictive. Octopus savings around £850 per year, unfortunately as we have solar panel/battery and Octopus Go tariff the saving would be nearer £150 per year, hardy worth the initial outlay and restrictive terms of use.
Unfortunately I have suffered a brain injury and occasionally I get confused and often say the wrong thing.