Not certain if this is a scam or not. I’m not an electrical engineer but when raising it with a friend who is he was very sceptical.ALSO, when I tried to buy one (so I could check it out fully and then correctly review it) the ‘system’ didnt like it and the transaction ‘froze’. When I contacted their customer services I found that there was a recorded message saying that they were experiencing delays due to the number of phone calls – and then you were simply cut offI finally used their ‘chat’ system and a person (Jose ?) checked and confirmed that the transaction hadn’t proceeded – he then said I should clear the history on my pc (dont know why – never been asked to do this before!)I have to admit that I remain sceptical as f what is claimed for this device is true then I would suggest that the UK government would be providing them free of charge – it would be a lot cheaper than paying £60 a month for the next six months to 20M households to reduce energy charges AND ordering new nuclear power stations costing £billions