Hello @emiliomoron
Here in Bogota, especially north of the city, there are houses that work with photovoltaic energy, because here really the services are super expensive, especially towards the north.
That should help them save a lot of money annually, but I know that it is expensive to install this system of electricity production, in addition to the fact that in Bogota is not always sunny, in fact, the weather is quite cold and often spend several days of rain. But, as in everything, it is necessary to adapt. What I can say is that the services rarely fail, they work quite well, hence the high cost.