Power supply manufacturer PULS
UK believes cheap inefficient power
supplies, often used in everyday
household and office electrical
equipment, are wasting energy and
increasing carbon emissions.

A power supply device sits hidden
inside, for example, a computer, TV
set, and industrial machinery, and
converts mains AC power into DC
power suitable for powering the
equipment involved. There are wide
variations in the quality of power
supplies and in many cases an
excessive amount of energy is lost
during the conversion process, often
greater than 25%.

For example, if energy costs are
10p/KWh and we use a computer
with a 1KW power supply, if the
power supply is only 80% efficient
this would mean a wastage of 250W,
whereas a unit delivering 96%
efficiency would lose only 52W,
equating to a £174 a year saving and
a reduction in CO2 emissions.

PULS UK believes that as well as
wasting less energy, high-quality
power supplies are more reliable and
last longer than many cheaper
alternatives, so the lifetime cost of
using them is actually lower.