Is it normal to read a voltage lower than that indicated on the Powered Anode rectifier?

The voltage automatically adjusts based on the resistance of your water. If there’s a very low voltage, it suggests that your water is highly conductive. In such situations, the anode doesn’t require a large current to ensure adequate protection. The key factor to consider is the mA level within the water heater. Importantly, there’s no need to measure the voltage; if any issue arises, the Corro-Protec power supply’s green light will turn off. This light is designed to illuminate only when a specific current threshold is achieved, indicating that the protection mechanism is operational.