Peter Parry wrote:
The "whole house" monitors which clip over one of the feeds to the
electricity meter and have a remote reader are really quite
inaccurate, vastly more so than the meter.

Inaccurate in what sense? I can see that a monitor that
returns significantly different results at different times
for the _same_ power usage would be useless; but one that
was always (e.g.) reading 20% high would still be useful as
a guide to whether your power usage had gone up or down.


#Paul