I researched, specified and fitted four solar panels to our boat 10 years ago, (so, my needs then were very different from domestic requirements today and for the foreseeable future - and technology has moved apace too)
However, the principles are similar. One needs to determine the likely available level of light available in each given location, the type of panel most suitable for that location, how and when you wish to use the power, the capacity of your battery bank (and the optimum is relevant to all the previously listed parameters AND the cost/charging rate of the various battery types, and the most efficient controllers to drive it all.
The process can be complicated, and there are many (energy vs cost) variables, so please don't scrimp with your research, (and do NOT accept initial quotes)
Also be prepared to accept that maximum power is provided when you need it least (bright summer days) and comparatively little is available when you need it most (winter)