I think that solar cells in general are not a promising direction in the future
Are you serious? I think you were not interested in this topic. At the moment, the Ta'u Island has already been completely transferred to solar energy by Tesla.
It has already been proven that solar panels are cost-effective even in small quantities.
An important factor is the lifetime of individual components. Photo panels suggest a decline in productivity to 80% in the 20th year, although they can work for 25 years
However, the performance is extremely high.
it is cool, however, that it is alarming the fact that Inverters generally serve 10-15 years, and the warranty period is set to 5 years.
The first step is to compile the specification, that is, the technical description of the system. First you need to make a list of all electrical appliances in the house, to find out their power and list them. And then you will be happy with the result