English to French Tech/Engineering Electronics / Elect Eng

a power bar display on a voltage optimiser showing how much energy savings you make using the machine.
savings depend on:
How many volts are being dropped, and
How much energy is being consumed.
It is broadly representative because we cannot differentiate between loads which yield a saving and loads which do not
It is scaled for an ‘average’ house
5V reduction – never reaches full scale
10V reduction – full scale at 1.25kW
15V reduction – full scale at 1kW
20V reduction – full scale at 0.75kW
25V reduction – full scale at 0.5kW
It is designed to spend most of its time at the top of the scale