Current average power usage / amount of credit left I'm guessing, can't imagine it being very accurate but let us know if it goes down if you turn the stove on.
OP can also get an estimate of current power used by installing app from Google play store called Energy Meter. Don't know how accurate it is but does give you an indication. It measures time between LED blinks and shows kwh usage.
I checked again this morning before leaving for work i.e. after breakfast usage and all that.
first press ... 50.3
second press ... h 15.5
I would assume h means hours and d means days. Big difference between the two figures. Could be that it uses the last hour's usage.
The SO topped up the electricity so we have over 200 units. I tested the second figure several times tonight and it seems completely useless. These were taken roughly a half hour apart.
d 10
d 5
d 3
d 9
d 19