A pure sine wave inverter that provides uninterrupted AC power for up to two ½ HP gate operators and their access control accessories in case of a power failure. It also features an ac/battery priority dip-switch function, allowing users to select whether to prioritize using AC power or battery power. Additionally, the inverter has built-in auto-open relays for gate operators, making it well-suited for use in automated gate systems. Lastly, this inverter has a built-in battery charger and LCD display to show the status of the inverter and battery.