An inverter is a technology that allows the compressor's output in a heat pump to be continuously regulated. Unlike conventional models, which only operate in "on/off" mode at full power, an inverter compressor adjusts its speed to the current need. For rapid water heating, it runs at maximum, but for maintaining temperature, it reduces its output and runs continuously at low speed. This prevents repetitive, energy-intensive starts, leading to lower electricity consumption. This mode of operation is also significantly quieter, ensures a more stable water temperature, and thanks to the gradual start-up, it does not strain the electrical grid with sudden current draws.