The less upfront cost of balcony solar system can save your electricity bill compared to a rooftop PV array, which the power cannot be stored and will mostly be used in your home’s appliances. Reasonable allocation of electricity consumption time can effectively save electricity bills.
It can be carried when moving or camping. Small solar panel and microinverter are both portable, you can put them in the trunk of your car and travel with you.
There is no need for a large roof of the self-built house, just a spacious balcony with sufficient light; no need to hire professionals to install, but realize plug-and-play by yourself, saving installation costs.