The smart switch was installed to replace the original switch in the camper van setup. It functions as a relay that can be remotely triggered on and off using Tuya via its Wi-Fi version. The device is versatile because it works for both DC low and AC and accepts an input voltage from the range of 7 to 32 volts. Its purpose is to manage the inverter's connection to the battery. When the load output disables the relay, the inverter also stops.

The Tuya smart switch accepts an input voltage from the range of 7 to 32 volts. This voltage serves as the controller voltage for the device. It does not matter what the polarity is when connecting to this input. This allows the switch to function as a controller for the inverter.

You can remotely enable or disable the inverter by using an app. Alternatively, you also have the option to start it directly from the device. The inverter starts because the relay is connected to a normally opened socket. Once it starts, the power goes to the charger to begin charging the banks.

When the battery voltage drops to 11 volts, the load disables the entire 12V power line. This action turns off devices such as the router and surveillance cameras. The relay itself will also be disabled at this voltage level. Because the inverter is connected directly to the batteries, it is also normally disabled. Although the inverter has its own protection at about 10.5 volts, it cannot be remotely controlled using an internet connection.

The smart switch has a maximum load capacity of 200 watts. The overall power of the device is approximately 300 W. Because of these power limits, you cannot connect a high power inverter directly to this load. The device is a very small controller that features passive cooling to ensure there is no noise.