**3.2 Household appliance consumption periodicity**

Similar ideas can work for matching electronics appliances consumption and wind or solar energy output. Energy consumption of most appliances like dish washer/dryer have relatively constant frequencies and phases—although these may vary from family to family—since most people have the habit of washing their dishes and clothes at regular time of every week. This gives us the idea to describe the energy consumption of different electronics appliances with pulses of different frequencies and phases uniformly distributed over their respective ranges.

For a typical American family of four people, we have the room properties as in Table 3. In Fig. 9 we have shown the energy consumption distribution. We represent the energy consumption of the electronics applicants of each family with rectangle pulse train, and Fig. 10 gives the combination results of energy consumption of 100, 000 families.

So long as the total production from wind or solar as the renewable source equals consumption from the appliances within the period of consideration—-such as a few hours or a day—- it is theoretically possible, via pricing, to match supply and demand.
