What defines a smart water heater?

A smart water heater is defined by its ability to allow remote monitoring and control of hot water usage, which reflects advancements in technology that enhance convenience and efficiency. This capability enables users to adjust settings and monitor energy usage via smartphone apps or web interfaces, providing greater control over hot water availability and consumption. It often incorporates features such as scheduling, usage reports, and alerts, which contribute to energy savings and proactive maintenance.

The other options do not accurately capture the essence of a smart water heater. Conventional energy sources alone do not imply smart technology, and the absence of user interaction contradicts the core idea of connectivity and control. Furthermore, operating without a thermostat is not a characteristic of smart water heaters; rather, they typically include advanced thermostatic controls to maintain optimal temperatures effectively.