The fastest way to a working system is the desk in your city. They already stock the line, they know the local load-shedding, and they are the people who will see you again after the box is opened.
Bring three things: the loads you care about, the roof or courtyard you can use for panels, and whether this is a home, a shop, or a site that cannot go dark. A good desk will not start with a price list. They will start with that list.
Ask who does the install, what the first service visit looks like, and how a warranty claim moves. Repair and replacement go through the service centre — not a number that forwards to someone else.
If your city does not have a desk yet, that is an opening, not a dead end. The requirements are public: time in solar, a proper shop floor, a first order, and clear payment terms. Search the city on this site and the next step is already written.