Setting up a backup power system with a generator or solar inverter? This 63A automatic transfer switch (ATS) is your brains of the operation. It automatically switches your load between the main utility power (L1), a generator (L2), and an inverter (L3) based on a priority logic you set. If the grid fails, it seamlessly kicks in the backup. It has built-in protection against overvoltage, undervoltage, and overcurrent to keep your sensitive electronics safe. The clear LED display shows real-time voltage and current. It’s designed for easy DIN rail mounting in your electrical panel. Perfect for homes, small businesses, workshops, or telecom setups that need reliable, hands-off power switching. Comes with a manual for setup.