I never managed to get to tees guys website – after 2 minutes of loading their homepage I gave up.
But regardless – the concept os interesting, I could see us using this during the summer months, as our house has 2 sets of boilers running 365 days/year to provide us with hot water, wasting a lot of gas.
Based on the idea of just heating the water you use, rather than pre-heating it and storing it in a tank, the system boasts several innovations in domestic water heating technology.
The patented Direct Electrical Resistance (DER) heating process uses graphite electrodes to heat the water and as well as creating instant heat it also gets by the problem of ‘furring’ of a regular heating element. The solid state components mean long life, no maintenance and no need for a flow switch. The voltage sensing power supply (100-277 VAC) along with a user selectable current setting from 15 to 48 amps means one SKU can serve many roles. The built-in WiFi allows users to remotely measure and control power and temperature and brings “smart grid” connectivity and the Internet of Things (IoT).
Update : I got into their site after 4 minutes – and their stuff looks good :