Photovoltaic grid connection box is a photovoltaic power station built near the user's site, operating in a self use and excess electricity gnid mode on theuser's side; A photovoltaic grid connected distribution box designed to maximize the sale operation of the system, ensure the sale coordination between theinverter and the municipal power grid, improve system relablility and energy metering, This product has the characteristics of high protection level, long servicelife,and convenient instalation and operation.ltsfunctions include isolation protection, overload protection,short circuit protection, surge grounding protectionovervoltage and undervoltage protection, post recovery reclosing, and power generation energy metering