As one of the most important components for the solar pv systems or solar power products, the quality and function of the controller will determine the working efficiency and quality of the complete system, also the lifetime of solar panels and batteries.
There are several technical data’s to be cleared before choosing the right type controller, such as the system voltage ( the system voltage of the solar panels ), max current of the battery lines and the solar panels lines, inlet of the cables, the protection functions of the controller, etc.
Based on the voltage of the system, there are :
12/24V series, 5A-10A, mostly used for solar light systems, and other smaller solar pv systems.
48V series, 30A-60A, best for some domestic solar pv systems
110V series, 30A-200A, best for both domestic solar pv systems and commercial systems.
220V series50A-200A and 360V series 100A-300A, all can be sued for both domestic systems and commercial projects.
Popular protection functions of controllers:
Protective and alarm function of photovoltaic battery array counter connection, counter charge at night, storage battery overcharge, storage battery over discharge, overload, short cirucit, etc.