TLDR: considering the solar panel in the photo, I would like to have as much information as possible regarding this type of photovoltaic solar panel for home use.

In case you're interested to know why, here's why: about four years ago, my local government installed free solar panels for hot water use in several homes, and I decided to sign up. Since they installed it, my gas bill has dropped significantly.
They are now promoting a similar project with electric solar panels, also for free, for those who qualify. I searched the municipality's website and found information related to how to apply for the benefit (which is helpful because I consider to sign up) but I found no technical information about the panel itself. Fortunately, the site does show the name of the company that installs the panels, and upon entering this company's site I found this photo. It makes sense that these are the type of panels they will install in our homes that sign up for the project, sincethey're using the picture to illustrate their services.
Based on this photo, what is a reasonable expectation I should have for when the panel is operational?
I imagine it requires a battery, right? I don't think it's direct electricity from the panel to the home's electrical grid. I know basically nothing about these, and I wanna know as much as possible before I sign up.