To pick-up from where we started looking at energy monitoring in @Jenki's blog post,       I bought four of these on Monday to add to my collection. They're actually a little different to the ones I previously bought although look identical. I only mention this because I've not opened them up but I did with the other ones and the relay was printed with 16A@240V and they seemed OK with a 3kW kettle load. Although the 13A plug and kettle lead did warm up as expected. I