I worked for a company that made a product similar to this and I'm not convinced they work as a consumer product.
Our customers would plug the device in and then use it for maybe two weeks and then forget about it.
The reality is, for most people there isn't much you can tell them. "Have shorter showers, turn off appliances at the wall, and buy new whiteware with a higher EnergyStar rating". In fact, I ended up increasing my power usage as I realised how little I was saving by turning appliances off.
Our customers would plug the device in and then use it for maybe two weeks and then forget about it.
The reality is, for most people there isn't much you can tell them. "Have shorter showers, turn off appliances at the wall, and buy new whiteware with a higher EnergyStar rating". In fact, I ended up increasing my power usage as I realised how little I was saving by turning appliances off.