"Andrew" wrote in message
...
On 28/11/2020 12:57, fred wrote:
https://www.amazon.co.uk/gp/product/...?ie=UTF8&psc=1
I bought one of these to monitor the electric consumption of the electric
car I recently purchased. The car isn't seeing much use so it only goes
on charge about once week.
I keep a note of the distance covered and record it against the kWhs used
to recharge the batteries.

The strange thing is the meter records usage when the car isn't being
charged.(i.e.) last week after recharging the meter read 73.65kWh. This
morning when going to recharge the car again the meter read 74.16kWh so
where did the 0.51kW go ?
Gremlins
Is my neighbour plugging in extension lead ?

It just questions my faith in the meter.


Have you tried fully charging it, leaving it standing for a
week without use, and then charging again to see how much battery
capacity has 'gone' without use ?.

I think he's talking about the meter for the house, rather than a "fuel
gauge" meter in the car, showing how much energy the batteries have stored.




Fred, having recharged the car last week to "full", was it plugged into the
meter for the week that it was not being used? Or does "when going to
recharge the car again" imply that it nothing was plugged into the meter
until you started to charge the car this morning?

Does the meter *only* measure electricity fed to the charger, or could it be
including some other usage within the house? Is it a separate meter to the
electricity company meter by which your bills are calculated? Could there be
a small leakage current flowing even when the charger isn't supplying power
to charge the car? Can you turn the charger off at its input when you know
that you won't need to charge the car? 0.51 kWhr in several days is not
much. To put it into perspective, my computer and monitor uses about 1.1
kWhr per day for the 12-14 hours that it is turned on (they are on standby
overnight, and the monitor is on standby during the day when I'm not
actually sat in front of it).