Cyberphysics

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!)

E	=	P	x	t
(kWh)		(kW)		(h)

= 1.2kW x 365.25h = 438.3kWh

Cost per kWh

20p

therefore total cost 438.3kWh x 20p/kWh
= 8766p

= £87-66

LOJ Dec 2000