With Shelly 1PM Gen3, you can effortlessly automate and control your water heater, ensuring optimal energy usage and hot water exactly when you need it. By integrating Shelly 1PM Gen3 with your water heater, you can monitor energy consumption, set schedules, and remotely control it from your smartphone or smart home system. By using smart schedules, you can program your water heater to turn on during cheaper, off-peak hours, ensuring hot water is ready for morning showers while reducing energy costs. Additionally, you can connect it to Shelly Plus Add-on with a DS18B20 sensor and measure the temperature of the water inside.