You should check out some of the solutions they have for RV's. Those are pretty portable. You could set it out on your balcony then pull it back in so no one would complain. They usually work with a power bank or battery and then you would just plug your stuff into that. It wouldn't let you feed back into the grid, but it would be a small easy way to get started. I have considered buying a system myself. We were driving through the "rustic" area of a campground the other weekend and quite a few people had small portable panels set out on their campsite.