Energy consumption is measured in Kw.h (kilowatt hours). One Kw.h is equivalent to the energy consumed by an appliance whose power is 1 Kw (1,000 watts), for one hour, or by an appliance consuming 0.5 Kw (500 watts) for 2 hours. We can know the electrical energy consumed by each device, in Kw.h multiplying its power (in Kw) by the hours it is plugged in:
Energy (Kw.h) = Power (Kw) . Time (hours)
Thus, a 50 w (0.05 Kw) bulb connected for 5 hours, will consume: 0.05 X 5 = 0.25 Kw.h
When the house is inhabited only on the weekend, you can estimate a consumption equal to a third of what it would have if it were permanently inhabited.
The electrical energy is of high quality, and its uses must also be. Therefore, we will not use electricity to transform it into heat (heating, cooking), unless we have overproduction. Electricity transformed into heat does not spread much. One Kw.h is equivalent to 860 Kcal, while one kilogram of firewood has more than 4,000 Kcal (about 5 Kw.h).
There are certain appliances such as plates, welders, etc., where electricity is necessary to heat, but this does not suppose a significant consumption for the few hours of use. Even these activities can be reserved for windy days if needed. We do more by not spending than by producing. Although the sun, water or wind are free, it is not about reproducing the consumerist habits of our society.
Authors: Val
