Total cost of solar energy
The market became accustomed to treating solar energy in a way that was widely accepted.
The criteria used in negotiations between sellers and buyers are very simple and easy to understand. It’s the “baker’s bill” (a Brazilian expression to designate a very simple and rudimentary calculation).:
* Investment in the system is identified
* Calculate the monthly savings you will make
* Divide one by the other and that’s it!
The result is the number of months to pay off the investment. From this month onwards, energy is “free”.
This is the sellers’ narrative and super palatable (and acceptable) for buyers.
However, I prefer to consider the following costs:
* Remuneration of invested capital (interest)
* Predictive and corrective maintenance
What do you want to use:: “baker’s bill” or the full bill?