The ACOS enable for smart switching between different electrical power sources (GRID, GENERATOR SET & SOLAR INVERTER). It eradicate the need for a conventional manual switching between different sources.The ACOS is electricaly made with industrial touch which allow for durability and a longer spanThe SS Bi-Rly 63A can swiftly switch between two electrical power sources while the SS Tri-Rly 63A can swiftly switch between three electrical power sources conveniently?The ACOS is ready to feed your home and office with the next available power source within microsecond without delay and interruption in service, meeting, work and entertainment.