Lak has it covered nicely.
The only add I would offer is that if your system is quite a distance from your service box, you may consider having them run a 50 or 60 amp sub-panel, positioned somewhere nearer to your system and then all your individual circuits would run out of the sub-panel.
The only add I would offer is that if your system is quite a distance from your service box, you may consider having them run a 50 or 60 amp sub-panel, positioned somewhere nearer to your system and then all your individual circuits would run out of the sub-panel.