The solar module inverter links the each PV module to a inverter, while each component has a separate maximum power peak tracking, so that the PV module is better matched with the inverter. Usually used for 50W to the 400W photovoltaic power generation station, the total efficiency is lower than the string inverter. Since the communication is in parallel, this increases the complexity of the connection of the AC side, and difficult to maintain. Another problem need to be solved is that how to connected with power grid more effectively, the simple way is to connect directly through the common AC socket. Thus can reduce the cost and simplify the equipment installation, but usually the grid safety standards of different cities may not be allowed to do so, the power company may against power devices directly connect to ordinary home users’ sockets. Another security related factor is whether or not to use the isolation transformer (high frequency or low frequency), or to allow the use of non transformer type inverter. This inverter is widely used in glass curtain wall.