P
|
=
|
1.2kW
|
t
|
=
|
1h per day
(365.25h per year)
This assumes that the hours in
a year is year is averaged out from the three years with 365
days and the fourth (leap year) with 366!)
|
= 1.2kW x 365.25h = 438.3kWh
therefore total cost 438.3kWh
x 20p/kWh
= 8766p
= £87-66
LOJ
Dec 2000
|