On Thursday, 9 November 2017 14:36:48 UTC, Andy Burns wrote:
whisky-dave wrote:

where does 17 come into it and where does 9 and the x 2 come into it.

5pm = 17:00, 9am = 9, 2kW heater

A 2kw heater that is full on III both LEDs lit and currently, checks again 721W
(215V @ 3.34A)

This is what I found confusing.