A typical 400–800 watt (W) balcony solar system costs $500–$1,500 and can shave roughly $15–$50 per month off your electric bill, depending on your location and utility rate.
Balcony solar — also called plug-in solar, micro solar, or plug-in photovoltaics (PIPV) — refers to compact solar panel systems of one to four panels (200W–1,200W total) 6 paired with a microinverter that converts DC power to AC 7 and plugs directly into a standard 120V.
Balconies are not storage units, and most leases say so explicitly. Keeping boxes, bicycles, spare furniture, or other clutter on your balcony typically violates your lease for two reasons: it looks bad from the outside, and loose items become projectiles in a storm.