Solar power is catching on but it does not work on all roofs in all locations and I am curious if companies pushing home roof top installations are upfront with

Solar power is catching on but it does not work on all roofs in all locations and I am curious if companies pushing home roof top installations are upfront with their numbers. I know our local energy co-op lets you "invest" into a facility they have constructed where they are adding panels as demand increases. The logic here is, not outlay of funds by the home owners, maintenance needs are consolidated to one location, and it can be ideally situated. Until panel installs become near maintenance free and service technicians are common where inspections are fast and cheap its not going to solve our problems. I am hoping TESLA's previous announcement related to solar shingles and such plays out well. It needs to become cheap enough that even if your system is not ideally situated its cheap enough to be economical.