Features: small and exquisite design; professional control IC provides low voltage; overload protection to solar panel and storage battery; used for lighting; camera; recorder; etc...; easy installation and operation; for use with: SOL5N; SOL6N; SOL8; output DC voltage: 13.0V ¦ 10%; output DC current: 4A max.; optimal input voltage (battery): 13.5V ¦ 10%; over-discharge protection voltage: <= 10.5V; overcharge protection voltage: >= 15V; solar panel: working current: <= 5A; open voltage: 21 ~ 24V; suggested type of rechargeable battery: 12V / 10 ~ 40Ah sealed lead acid battery; working temperature: +14¦F ~ +107¦F; humidity : <= 80%; dimensions: 4.7" x 3.1" x 0.9.