What is an AC Transfer Switch?

INTELLI-WAVE AC TRANSFER SWITCH

Projecta 2000 Watt Pure Sine Wave Inverters include a built in automatic AC Transfer Switch. The switch allows an appliance to be powered from either mains power or the inverter (battery power). The inclusion of the AC transfer switch makes it ideal for permanent installation in caravans, motor homes, work vehicles etc ensuring continuous and uninterrupted AC power when switching from battery power to mains power and vice versa. The automatic change-over function means there is no need to manually swap over AC plugs or switch dials between the two power sources.
To ensure a continuous flow of power to the appliance when switching to mains power supply, the IP2000 range has been engineered to wait 3 seconds for the power to be steady before switching in a super fast 20 millisecond (0.02 seconds) change-over. This guarantees smooth change over and means no interruption when running appliances, e.g. computers won’t reboot, TVs won’t switch off etc. The IP2000 inverter offers a number of advantages over a typical inverter/charger combination. Keeping the two units independent of one another allows you to combine the IP2000 with any size battery charger for the ultimate tailor made set-up, and because they are two separate units, either can operate without the other in the event that one fails. When mains power is available, the battery charger charges the battery and the mains power passes through the inverter and powers the accessories directly. When the mains is disconnected the battery charger stops working and the appliance automatically switches across to inverter power.