NY wrote:

Roger Mills wrote:

According to the blurb, it switches itself off at above 1650watts, so
I would have thought it was totally unsuitable for measuring car
charging consumption, anyway.

Hadn't spotted that little gem. Having an overload cutout above 1650W
makes it about as much use as a chocolate teapot for many appliances -
oh, and you wouldn't be able to use a kettle to heat the water in the
chocolate teapot ;-)

You'd expect the cutout to be set at slightly more than 3 kW, to allow
for the maximum 13A current draw (plus a bit of headroom) from one 3-pin
socket.

Maybe the 1650W is a copy/paste error from a 110V spec version?
Elsewhere it says

- Operating current: max 13A
· Wide voltage range: 200V-250V
· Wattage display(Watts): 0W-2900W
· Current display(Amps): 0.0A---13.0A