The cost of intermittence (Brazil)
A house that installs a photovoltaic solar system, can practically zero its electric bill before the local electric utility company.
The logic is simple. During the day the production excess is exported to the grid. At night the house receives back the necessary volume, importing from the local utility company. The accounting between import and exports may even zero and.... everything is great!
 For this household , everything is cool!
The electrical system stops or severely drops supplying during the day. Therefore, it reduces its sales, for the same investment in generation, transmission and distribution.
Result? Tariffs have to be raised to make up the difference. That's how regulation works.
Bottom line. It's those who don't install solar who pay the bill.
Rafael Herzberg
Expert Member
Top Contributor